[PATCHv5 0/8] Display Global Histogram

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* [PATCHv5 0/8] Display Global Histogram
@ 2024-11-19 10:45 Arun R Murthy
  2024-11-19 10:45 ` [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram Arun R Murthy
                   ` (10 more replies)
  0 siblings, 11 replies; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

Display histogram is a hardware functionality where a statistics for 'x'
number of frames is generated to form a histogram data. This is notified
to the user via histogram event. Compositor will then upon sensing the
histogram event will read the histogram data from KMD via crtc property.
A library can be developed to take this generated histogram as an
input and apply some algorithm to generate an Image EnhancemenT(IET).
This is further fed back to the KMD via crtc property. KMD will use this
IET as a multiplicand factor to multiply with the incoming pixels at the
end of the pipe which is then pushed onto the display.

One such library Global Histogram Enhancement(GHE) will take the histogram
as input and applied the algorithm to enhance the density and then
return the enhanced factor. This library can be located @
https://github.com/intel/ghe

The corresponding mutter changes to enable/disable histogram, read the
histogram data, communicate with the library and write the enhanced data
back to the KMD is also pushed for review at https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3873
The IGT changes for validating the histogram event and reading the
histogram is also pushed for review at https://patchwork.freedesktop.org/series/135789/

Test-with: 20240705091333.328322-1-mohammed.thasleem@intel.com

Arun R Murthy (8):
  drm/i915/histogram: Define registers for histogram
  drm/i915/histogram: Add support for histogram
  drm/xe: Add histogram support to Xe builds
  drm/i915/histogram: histogram interrupt handling
  drm/i915/histogram: Add crtc properties for global histogram
  drm/i915/histogram: histogram delay counter doesnt reset
  drm/i915/histogram: Histogram changes for Display 20+
  drm/i915/histogram: Enable pipe dithering

 drivers/gpu/drm/i915/Makefile                 |   1 +
 drivers/gpu/drm/i915/display/intel_atomic.c   |   5 +
 drivers/gpu/drm/i915/display/intel_crtc.c     | 168 +++++++-
 drivers/gpu/drm/i915/display/intel_crtc.h     |   5 +
 drivers/gpu/drm/i915/display/intel_display.c  |  18 +
 .../gpu/drm/i915/display/intel_display_irq.c  |   6 +-
 .../drm/i915/display/intel_display_types.h    |  15 +
 .../gpu/drm/i915/display/intel_histogram.c    | 370 ++++++++++++++++++
 .../gpu/drm/i915/display/intel_histogram.h    |  38 ++
 .../drm/i915/display/intel_histogram_regs.h   |  74 ++++
 drivers/gpu/drm/i915/i915_reg.h               |   5 +-
 drivers/gpu/drm/xe/Makefile                   |   1 +
 12 files changed, 702 insertions(+), 4 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.c
 create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.h
 create mode 100644 drivers/gpu/drm/i915/display/intel_histogram_regs.h

-- 
2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-20  7:17   ` Kandpal, Suraj
  2024-11-19 10:45 ` [PATCHv4 2/8] drm/i915/histogram: Add support " Arun R Murthy
                   ` (9 subsequent siblings)
  10 siblings, 1 reply; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

Add the register/bit definitions for global histogram.

v2: Intended the register contents, removed unused regs (Jani)

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 .../drm/i915/display/intel_histogram_regs.h   | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 drivers/gpu/drm/i915/display/intel_histogram_regs.h

diff --git a/drivers/gpu/drm/i915/display/intel_histogram_regs.h b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
new file mode 100644
index 000000000000..1252b4f339a6
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef __INTEL_HISTOGRAM_REGS_H__
+#define __INTEL_HISTOGRAM_REGS_H__
+
+#include "intel_display_reg_defs.h"
+
+/* GLOBAL_HIST related registers */
+#define _DPST_CTL_A					0x490C0
+#define _DPST_CTL_B					0x491C0
+#define DPST_CTL(pipe)					_MMIO_PIPE(pipe, _DPST_CTL_A, _DPST_CTL_B)
+#define  DPST_CTL_IE_HIST_EN				REG_BIT(31)
+#define  DPST_CTL_RESTORE				REG_BIT(28)
+#define  DPST_CTL_IE_MODI_TABLE_EN			REG_BIT(27)
+#define  DPST_CTL_HIST_MODE				REG_BIT(24)
+#define  DPST_CTL_ENHANCEMENT_MODE_MASK			REG_GENMASK(14, 13)
+#define  DPST_CTL_EN_MULTIPLICATIVE			REG_FIELD_PREP(DPST_CTL_ENHANCEMENT_MODE_MASK, 2)
+#define  DPST_CTL_IE_TABLE_VALUE_FORMAT			REG_BIT(15)
+#define  DPST_CTL_BIN_REG_FUNC_SEL			REG_BIT(11)
+#define  DPST_CTL_BIN_REG_FUNC_TC			REG_FIELD_PREP(DPST_CTL_BIN_REG_FUNC_SEL, 0)
+#define  DPST_CTL_BIN_REG_FUNC_IE			REG_FIELD_PREP(DPST_CTL_BIN_REG_FUNC_SEL, 1)
+#define  DPST_CTL_BIN_REG_MASK				REG_GENMASK(6, 0)
+#define  DPST_CTL_BIN_REG_CLEAR				REG_FIELD_PREP(DPST_CTL_BIN_REG_MASK, 0)
+#define  DPST_CTL_IE_TABLE_VALUE_FORMAT_2INT_8FRAC	REG_FIELD_PREP(DPST_CTL_IE_TABLE_VALUE_FORMAT, 1)
+#define  DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC	REG_FIELD_PREP(DPST_CTL_IE_TABLE_VALUE_FORMAT, 0)
+#define  DPST_CTL_HIST_MODE_YUV				REG_FIELD_PREP(DPST_CTL_HIST_MODE, 0)
+#define  DPST_CTL_HIST_MODE_HSV				REG_FIELD_PREP(DPST_CTL_HIST_MODE, 1)
+
+#define _DPST_GUARD_A					0x490C8
+#define _DPST_GUARD_B					0x491C8
+#define DPST_GUARD(pipe)				_MMIO_PIPE(pipe, _DPST_GUARD_A, _DPST_GUARD_B)
+#define  DPST_GUARD_HIST_INT_EN				REG_BIT(31)
+#define  DPST_GUARD_HIST_EVENT_STATUS			REG_BIT(30)
+#define  DPST_GUARD_INTERRUPT_DELAY_MASK			REG_GENMASK(29, 22)
+#define  DPST_GUARD_INTERRUPT_DELAY(val)			REG_FIELD_PREP(DPST_GUARD_INTERRUPT_DELAY_MASK, val)
+#define  DPST_GUARD_THRESHOLD_GB_MASK			REG_GENMASK(21, 0)
+#define  DPST_GUARD_THRESHOLD_GB(val)			REG_FIELD_PREP(DPST_GUARD_THRESHOLD_GB_MASK, val)
+
+#define _DPST_BIN_A					0x490C4
+#define _DPST_BIN_B					0x491C4
+#define DPST_BIN(pipe)					_MMIO_PIPE(pipe, _DPST_BIN_A, _DPST_BIN_B)
+#define  DPST_BIN_DATA_MASK				REG_GENMASK(23, 0)
+#define  DPST_BIN_BUSY					REG_BIT(31)
+
+#endif /* __INTEL_HISTOGRAM_REGS_H__ */
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCHv4 2/8] drm/i915/histogram: Add support for histogram
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
  2024-11-19 10:45 ` [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-20  8:13   ` Kandpal, Suraj
  2024-11-19 10:45 ` [PATCH 3/8] drm/xe: Add histogram support to Xe builds Arun R Murthy
                   ` (8 subsequent siblings)
  10 siblings, 1 reply; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

Statistics is generated from the image frame that is coming to display
and an event is sent to user after reading this histogram data.
This statistics/histogram is then shared with the user upon getting a
request from user. User can then use this histogram and generate an
enhancement factor. This enhancement factor can be multiplied/added with
the incoming pixel data frame.

v2: forward declaration in header file along with error handling (Jani)
v3: Replaced i915 with intel_display (Suraj)
v4: Removed dithering enable/disable (Vandita)
    New patch for histogram register definitions (Suraj)

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 drivers/gpu/drm/i915/Makefile                 |   1 +
 .../drm/i915/display/intel_display_types.h    |   2 +
 .../gpu/drm/i915/display/intel_histogram.c    | 195 ++++++++++++++++++
 .../gpu/drm/i915/display/intel_histogram.h    |  35 ++++
 4 files changed, 233 insertions(+)
 create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.c
 create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index e465828d748f..97141b4def3b 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -267,6 +267,7 @@ i915-y += \
 	display/intel_hdcp.o \
 	display/intel_hdcp_gsc.o \
 	display/intel_hdcp_gsc_message.o \
+	display/intel_histogram.o \
 	display/intel_hotplug.o \
 	display/intel_hotplug_irq.o \
 	display/intel_hti.o \
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 339e4b0f7698..351441efd10a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1414,6 +1414,8 @@ struct intel_crtc {
 	/* for loading single buffered registers during vblank */
 	struct pm_qos_request vblank_pm_qos;
 
+	struct intel_histogram *histogram;
+
 #ifdef CONFIG_DEBUG_FS
 	struct intel_pipe_crc pipe_crc;
 #endif
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
new file mode 100644
index 000000000000..e751977fc6f7
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#include <drm/drm_device.h>
+#include <drm/drm_file.h>
+#include <drm/drm_vblank.h>
+
+#include "i915_reg.h"
+#include "i915_drv.h"
+#include "intel_display.h"
+#include "intel_histogram_regs.h"
+#include "intel_histogram.h"
+#include "intel_display_types.h"
+#include "intel_de.h"
+
+#define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300    // 3.0% of the pipe's current pixel count.
+#define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000   // Precision factor for threshold guardband.
+#define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04
+
+struct intel_histogram {
+	struct intel_crtc *crtc;
+	struct delayed_work work;
+	bool enable;
+	bool can_enable;
+	u32 bin_data[HISTOGRAM_BIN_COUNT];
+};
+
+int intel_histogram_atomic_check(struct intel_crtc *intel_crtc)
+{
+	struct intel_histogram *histogram = intel_crtc->histogram;
+
+	/* TODO: Restrictions for enabling histogram */
+	histogram->can_enable = true;
+
+	return 0;
+}
+
+static int intel_histogram_enable(struct intel_crtc *intel_crtc)
+{
+	struct intel_display *display = to_intel_display(intel_crtc);
+	struct intel_histogram *histogram = intel_crtc->histogram;
+	int pipe = intel_crtc->pipe;
+	u64 res;
+	u32 gbandthreshold;
+
+	if (!histogram)
+		return -EINVAL;
+
+	if (!histogram->can_enable)
+		return -EINVAL;
+
+	if (histogram->enable)
+		return 0;
+
+	 /* enable histogram, clear DPST_BIN reg and select TC function */
+	intel_de_rmw(display, DPST_CTL(pipe),
+		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
+		     DPST_CTL_HIST_MODE | DPST_CTL_IE_TABLE_VALUE_FORMAT,
+		     DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
+		     DPST_CTL_HIST_MODE_HSV |
+		     DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
+
+	/* Re-Visit: check if wait for one vblank is required */
+	drm_crtc_wait_one_vblank(&intel_crtc->base);
+
+	/*
+	 * TODO: one time programming: Program GuardBand Threshold.
+	 * To be moved to modeset path
+	 */
+	res = (intel_crtc->config->hw.adjusted_mode.vtotal *
+	       intel_crtc->config->hw.adjusted_mode.htotal);
+
+	gbandthreshold = (res *	HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT) /
+			  HISTOGRAM_GUARDBAND_PRECISION_FACTOR;
+
+	/* Enable histogram interrupt mode */
+	intel_de_rmw(display, DPST_GUARD(pipe),
+		     DPST_GUARD_THRESHOLD_GB_MASK |
+		     DPST_GUARD_INTERRUPT_DELAY_MASK | DPST_GUARD_HIST_INT_EN,
+		     DPST_GUARD_THRESHOLD_GB(gbandthreshold) |
+		     DPST_GUARD_INTERRUPT_DELAY(HISTOGRAM_DEFAULT_GUARDBAND_DELAY) |
+		     DPST_GUARD_HIST_INT_EN);
+
+	/* Clear pending interrupts has to be done on separate write */
+	intel_de_rmw(display, DPST_GUARD(pipe),
+		     DPST_GUARD_HIST_EVENT_STATUS, 1);
+
+	histogram->enable = true;
+
+	return 0;
+}
+
+static void intel_histogram_disable(struct intel_crtc *intel_crtc)
+{
+	struct intel_display *display = to_intel_display(intel_crtc);
+	struct intel_histogram *histogram = intel_crtc->histogram;
+	int pipe = intel_crtc->pipe;
+
+	if (!histogram)
+		return;
+
+	/* If already disabled return */
+	if (histogram->enable)
+		return;
+
+	/* Clear pending interrupts and disable interrupts */
+	intel_de_rmw(display, DPST_GUARD(pipe),
+		     DPST_GUARD_HIST_INT_EN | DPST_GUARD_HIST_EVENT_STATUS, 0);
+
+	/* disable DPST_CTL Histogram mode */
+	intel_de_rmw(display, DPST_CTL(pipe),
+		     DPST_CTL_IE_HIST_EN, 0);
+
+	histogram->enable = false;
+}
+
+int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable)
+{
+	if (enable)
+		return intel_histogram_enable(intel_crtc);
+
+	intel_histogram_disable(intel_crtc);
+	return 0;
+}
+
+int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data)
+{
+	struct intel_histogram *histogram = intel_crtc->histogram;
+	struct intel_display *display = to_intel_display(intel_crtc);
+	int pipe = intel_crtc->pipe;
+	int i = 0;
+
+	if (!histogram)
+		return -EINVAL;
+
+	if (!histogram->enable) {
+		drm_err(display->drm, "histogram not enabled");
+		return -EINVAL;
+	}
+
+	if (!data) {
+		drm_err(display->drm, "enhancement LUT data is NULL");
+		return -EINVAL;
+	}
+
+	/*
+	 * Set DPST_CTL Bin Reg function select to IE
+	 * Set DPST_CTL Bin Register Index to 0
+	 */
+	intel_de_rmw(display, DPST_CTL(pipe),
+		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK,
+		     DPST_CTL_BIN_REG_FUNC_IE | DPST_CTL_BIN_REG_CLEAR);
+
+	for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
+		intel_de_rmw(display, DPST_BIN(pipe),
+			     DPST_BIN_DATA_MASK, data[i]);
+		drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i, data[i]);
+	}
+
+	intel_de_rmw(display, DPST_CTL(pipe),
+		     DPST_CTL_ENHANCEMENT_MODE_MASK | DPST_CTL_IE_MODI_TABLE_EN,
+		     DPST_CTL_EN_MULTIPLICATIVE | DPST_CTL_IE_MODI_TABLE_EN);
+
+	/* Once IE is applied, change DPST CTL to TC */
+	intel_de_rmw(display, DPST_CTL(pipe),
+		     DPST_CTL_BIN_REG_FUNC_SEL, DPST_CTL_BIN_REG_FUNC_TC);
+
+	return 0;
+}
+
+void intel_histogram_finish(struct intel_crtc *intel_crtc)
+{
+	struct intel_histogram *histogram = intel_crtc->histogram;
+
+	kfree(histogram);
+}
+
+int intel_histogram_init(struct intel_crtc *intel_crtc)
+{
+	struct intel_histogram *histogram;
+
+	/* Allocate histogram internal struct */
+	histogram = kzalloc(sizeof(*histogram), GFP_KERNEL);
+	if (!histogram) {
+		return -ENOMEM;
+	}
+
+	intel_crtc->histogram = histogram;
+	histogram->crtc = intel_crtc;
+	histogram->can_enable = false;
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h b/drivers/gpu/drm/i915/display/intel_histogram.h
new file mode 100644
index 000000000000..9d66724f9c53
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_histogram.h
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef __INTEL_HISTOGRAM_H__
+#define __INTEL_HISTOGRAM_H__
+
+#include <linux/types.h>
+
+struct intel_crtc;
+
+#define HISTOGRAM_BIN_COUNT                    32
+#define HISTOGRAM_IET_LENGTH                   33
+
+enum intel_global_hist_status {
+	INTEL_HISTOGRAM_ENABLE,
+	INTEL_HISTOGRAM_DISABLE,
+};
+
+enum intel_global_histogram {
+	INTEL_HISTOGRAM,
+};
+
+enum intel_global_hist_lut {
+	INTEL_HISTOGRAM_PIXEL_FACTOR,
+};
+
+int intel_histogram_atomic_check(struct intel_crtc *intel_crtc);
+int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable);
+int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data);
+int intel_histogram_init(struct intel_crtc *intel_crtc);
+void intel_histogram_finish(struct intel_crtc *intel_crtc);
+
+#endif /* __INTEL_HISTOGRAM_H__ */
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCH 3/8] drm/xe: Add histogram support to Xe builds
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
  2024-11-19 10:45 ` [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram Arun R Murthy
  2024-11-19 10:45 ` [PATCHv4 2/8] drm/i915/histogram: Add support " Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-19 10:45 ` [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling Arun R Murthy
                   ` (7 subsequent siblings)
  10 siblings, 0 replies; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy, Suraj Kandpal

Histogram added as part of i915/display driver. Adding the same for xe
as well.

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/xe/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index a93e6fcc0ad9..d383b0d35d8e 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -245,6 +245,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
 	i915-display/intel_hdcp.o \
 	i915-display/intel_hdcp_gsc_message.o \
 	i915-display/intel_hdmi.o \
+	i915-display/intel_histogram.o \
 	i915-display/intel_hotplug.o \
 	i915-display/intel_hotplug_irq.o \
 	i915-display/intel_hti.o \
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (2 preceding siblings ...)
  2024-11-19 10:45 ` [PATCH 3/8] drm/xe: Add histogram support to Xe builds Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-19 11:36   ` Jani Nikula
  2024-11-19 10:45 ` [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram Arun R Murthy
                   ` (6 subsequent siblings)
  10 siblings, 1 reply; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

Upon enabling histogram an interrupt is trigerred after the generation
of the statistics. This patch registers the histogram interrupt and
handles the interrupt.

v2: Added intel_crtc backpointer to intel_histogram struct (Jani)
    Removed histogram_wq and instead use dev_priv->unodered_eq (Jani)
v3: Replaced drm_i915_private with intel_display (Suraj)
    Refactored the histogram read code (Jani)
v4: Rebased after addressing comments on patch 1

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 .../gpu/drm/i915/display/intel_display_irq.c  |  6 +-
 .../gpu/drm/i915/display/intel_histogram.c    | 93 +++++++++++++++++++
 .../gpu/drm/i915/display/intel_histogram.h    |  3 +
 drivers/gpu/drm/i915/i915_reg.h               |  5 +-
 4 files changed, 104 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c b/drivers/gpu/drm/i915/display/intel_display_irq.c
index f0d3bdb5fc60..cb60c9db4418 100644
--- a/drivers/gpu/drm/i915/display/intel_display_irq.c
+++ b/drivers/gpu/drm/i915/display/intel_display_irq.c
@@ -20,6 +20,7 @@
 #include "intel_fdi_regs.h"
 #include "intel_fifo_underrun.h"
 #include "intel_gmbus.h"
+#include "intel_histogram.h"
 #include "intel_hotplug_irq.h"
 #include "intel_pipe_crc_regs.h"
 #include "intel_pmdemand.h"
@@ -1179,6 +1180,9 @@ void gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
 		if (iir & GEN8_PIPE_FIFO_UNDERRUN)
 			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
 
+		if (iir & GEN9_PIPE_HISTOGRAM_EVENT)
+			intel_histogram_irq_handler(display, pipe);
+
 		fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv);
 		if (fault_errors)
 			drm_err_ratelimited(&dev_priv->drm,
@@ -1764,7 +1768,7 @@ void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
 	struct intel_uncore *uncore = &dev_priv->uncore;
 
 	u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) |
-		GEN8_PIPE_CDCLK_CRC_DONE;
+		GEN8_PIPE_CDCLK_CRC_DONE | GEN9_PIPE_HISTOGRAM_EVENT;
 	u32 de_pipe_enables;
 	u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
 	u32 de_port_enables;
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index e751977fc6f7..16f29923ef10 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -18,6 +18,8 @@
 #define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300    // 3.0% of the pipe's current pixel count.
 #define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000   // Precision factor for threshold guardband.
 #define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04
+#define HISTOGRAM_BIN_READ_RETRY_COUNT 5
+#define HISTOGRAM_BIN_READ_DELAY 2
 
 struct intel_histogram {
 	struct intel_crtc *crtc;
@@ -27,6 +29,92 @@ struct intel_histogram {
 	u32 bin_data[HISTOGRAM_BIN_COUNT];
 };
 
+static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
+{
+	struct intel_display *display = to_intel_display(intel_crtc);
+	struct intel_histogram *histogram = intel_crtc->histogram;
+	u8 index, retry_count;
+	u32 dpstbin;
+
+	index = 0;
+	retry_count = 0;
+
+	while (index < HISTOGRAM_BIN_COUNT) {
+		dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe));
+		if (!(dpstbin & DPST_BIN_BUSY)) {
+			histogram->bin_data[index] = dpstbin & DPST_BIN_DATA_MASK;
+			index++;
+		} else {
+			/*
+			 * If DPST_BIN busy bit is set, then set the
+			 * DPST_CTL bin reg index to 0 and proceed
+			 * from beginning.
+			 */
+			retry_count++;
+			if (retry_count > HISTOGRAM_BIN_READ_RETRY_COUNT) {
+				drm_err(display->drm, "Histogram bin read failed with max retry\n");
+				return false;
+			}
+			/* Add a delay before retrying */
+			fsleep(HISTOGRAM_BIN_READ_DELAY);
+			index = 0;
+			intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
+				     DPST_CTL_BIN_REG_FUNC_SEL |
+				     DPST_CTL_BIN_REG_MASK, 0);
+		}
+	}
+	return true;
+}
+
+static void intel_histogram_handle_int_work(struct work_struct *work)
+{
+	struct intel_histogram *histogram = container_of(work,
+		struct intel_histogram, work.work);
+	struct intel_crtc *intel_crtc = histogram->crtc;
+	struct intel_display *display = to_intel_display(intel_crtc);
+	char *histogram_event[] = {"HISTOGRAM=1", NULL};
+
+	/*
+	 * TODO: PSR to be exited while reading the Histogram data
+	 * Set DPST_CTL Bin Reg function select to TC
+	 * Set DPST_CTL Bin Register Index to 0
+	 */
+	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
+		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
+	if (intel_histogram_get_data(intel_crtc)) {
+		/* Notify user for Histogram rediness */
+		if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
+				       KOBJ_CHANGE, histogram_event))
+			drm_err(display->drm,
+				"sending HISTOGRAM event failed\n");
+	}
+
+	/* Enable histogram interrupt */
+	intel_de_rmw(display, DPST_GUARD(intel_crtc->pipe), DPST_GUARD_HIST_INT_EN,
+		     DPST_GUARD_HIST_INT_EN);
+
+	/* Clear histogram interrupt by setting histogram interrupt status bit*/
+	intel_de_rmw(display, DPST_GUARD(intel_crtc->pipe),
+		     DPST_GUARD_HIST_EVENT_STATUS, 1);
+}
+
+void intel_histogram_irq_handler(struct intel_display *display, enum pipe pipe)
+{
+	struct intel_crtc *intel_crtc =
+		to_intel_crtc(drm_crtc_from_index(display->drm, pipe));
+	struct intel_histogram *histogram = intel_crtc->histogram;
+	struct drm_i915_private *i915 = to_i915(intel_crtc->base.dev);
+
+	if (!histogram->enable) {
+		drm_err(display->drm,
+			"spurious interrupt, histogram not enabled\n");
+		return;
+	}
+
+	queue_delayed_work(i915->unordered_wq,
+			   &histogram->work, 0);
+}
+
 int intel_histogram_atomic_check(struct intel_crtc *intel_crtc)
 {
 	struct intel_histogram *histogram = intel_crtc->histogram;
@@ -113,6 +201,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc)
 	intel_de_rmw(display, DPST_CTL(pipe),
 		     DPST_CTL_IE_HIST_EN, 0);
 
+	cancel_delayed_work(&histogram->work);
 	histogram->enable = false;
 }
 
@@ -174,6 +263,7 @@ void intel_histogram_finish(struct intel_crtc *intel_crtc)
 {
 	struct intel_histogram *histogram = intel_crtc->histogram;
 
+	cancel_delayed_work_sync(&histogram->work);
 	kfree(histogram);
 }
 
@@ -191,5 +281,8 @@ int intel_histogram_init(struct intel_crtc *intel_crtc)
 	histogram->crtc = intel_crtc;
 	histogram->can_enable = false;
 
+	INIT_DEFERRABLE_WORK(&histogram->work,
+			     intel_histogram_handle_int_work);
+
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h b/drivers/gpu/drm/i915/display/intel_histogram.h
index 9d66724f9c53..14f2425e3038 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.h
+++ b/drivers/gpu/drm/i915/display/intel_histogram.h
@@ -9,6 +9,8 @@
 #include <linux/types.h>
 
 struct intel_crtc;
+struct intel_display;
+enum pipe;
 
 #define HISTOGRAM_BIN_COUNT                    32
 #define HISTOGRAM_IET_LENGTH                   33
@@ -27,6 +29,7 @@ enum intel_global_hist_lut {
 };
 
 int intel_histogram_atomic_check(struct intel_crtc *intel_crtc);
+void intel_histogram_irq_handler(struct intel_display *display, enum pipe pipe);
 int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable);
 int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data);
 int intel_histogram_init(struct intel_crtc *intel_crtc);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7a35be56b7ef..40a7c6a77bcc 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1605,7 +1605,7 @@
 #define   PIPE_HOTPLUG_INTERRUPT_ENABLE		(1UL << 26)
 #define   PIPE_VSYNC_INTERRUPT_ENABLE		(1UL << 25)
 #define   PIPE_DISPLAY_LINE_COMPARE_ENABLE	(1UL << 24)
-#define   PIPE_DPST_EVENT_ENABLE		(1UL << 23)
+#define   PIPE_HISTOGRAM_EVENT_ENABLE		(1UL << 23)
 #define   SPRITE0_FLIP_DONE_INT_EN_VLV		(1UL << 22)
 #define   PIPE_LEGACY_BLC_EVENT_ENABLE		(1UL << 22)
 #define   PIPE_ODD_FIELD_INTERRUPT_ENABLE	(1UL << 21)
@@ -1628,7 +1628,7 @@
 #define   PIPE_HOTPLUG_INTERRUPT_STATUS		(1UL << 10)
 #define   PIPE_VSYNC_INTERRUPT_STATUS		(1UL << 9)
 #define   PIPE_DISPLAY_LINE_COMPARE_STATUS	(1UL << 8)
-#define   PIPE_DPST_EVENT_STATUS		(1UL << 7)
+#define   PIPE_HISTOGRAM_EVENT_STATUS		(1UL << 7)
 #define   PIPE_A_PSR_STATUS_VLV			(1UL << 6)
 #define   PIPE_LEGACY_BLC_EVENT_STATUS		(1UL << 6)
 #define   PIPE_ODD_FIELD_INTERRUPT_STATUS	(1UL << 5)
@@ -2470,6 +2470,7 @@
 #define  GEN12_DSB_1_INT		REG_BIT(14) /* tgl+ */
 #define  GEN12_DSB_0_INT		REG_BIT(13) /* tgl+ */
 #define  GEN12_DSB_INT(dsb_id)		REG_BIT(13 + (dsb_id))
+#define  GEN9_PIPE_HISTOGRAM_EVENT	REG_BIT(12) /* skl+ */
 #define  GEN9_PIPE_CURSOR_FAULT		REG_BIT(11) /* skl+ */
 #define  GEN9_PIPE_PLANE4_FAULT		REG_BIT(10) /* skl+ */
 #define  GEN8_PIPE_CURSOR_FAULT		REG_BIT(10) /* bdw */
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (3 preceding siblings ...)
  2024-11-19 10:45 ` [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-19 11:41   ` Jani Nikula
  2024-11-20  8:33   ` Kandpal, Suraj
  2024-11-19 10:45 ` [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset Arun R Murthy
                   ` (5 subsequent siblings)
  10 siblings, 2 replies; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

CRTC properties have been added for enable/disable histogram, reading
the histogram data and writing the IET data.
"HISTOGRAM_EN" is the crtc property to enable/disable the global
histogram and takes a value 0/1 accordingly.
"Histogram" is a crtc property to read the binary histogram data.
"Global IET" is a crtc property to write the IET binary LUT data.

v2: Read the histogram blob data before sending uevent (Jani)
v3: use drm_property_replace_blob_from_id (Vandita)
    Add substruct for histogram in intel_crtc_state (Jani)
v4:  Rebased after addressing comments on patch 1
v5: histogram check with old/new crtc_state (Suraj)

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 drivers/gpu/drm/i915/display/intel_atomic.c   |   5 +
 drivers/gpu/drm/i915/display/intel_crtc.c     | 168 +++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_crtc.h     |   5 +
 drivers/gpu/drm/i915/display/intel_display.c  |  18 ++
 .../drm/i915/display/intel_display_types.h    |  13 ++
 .../gpu/drm/i915/display/intel_histogram.c    |   6 +
 6 files changed, 214 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index 03dc54c802d3..a0d64a20b01e 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -246,6 +246,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
 
 	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->uapi);
 
+	if (crtc_state->histogram.global_iet)
+		drm_property_blob_get(crtc_state->histogram.global_iet);
 	/* copy color blobs */
 	if (crtc_state->hw.degamma_lut)
 		drm_property_blob_get(crtc_state->hw.degamma_lut);
@@ -278,6 +280,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
 	crtc_state->dsb_color_vblank = NULL;
 	crtc_state->dsb_commit = NULL;
 	crtc_state->use_dsb = false;
+	crtc_state->histogram.histogram_enable_changed = false;
 
 	return &crtc_state->uapi;
 }
@@ -314,6 +317,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
 	drm_WARN_ON(crtc->dev, crtc_state->dsb_color_vblank);
 	drm_WARN_ON(crtc->dev, crtc_state->dsb_commit);
 
+	if (crtc_state->histogram.global_iet)
+		drm_property_blob_put(crtc_state->histogram.global_iet);
 	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
 	intel_crtc_free_hw_state(crtc_state);
 	if (crtc_state->dp_tunnel_ref.tunnel)
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
index a2c528d707f4..3be81a5a789b 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -11,6 +11,7 @@
 #include <drm/drm_plane.h>
 #include <drm/drm_vblank.h>
 #include <drm/drm_vblank_work.h>
+#include <drm/drm_atomic_uapi.h>
 
 #include "i915_vgpu.h"
 #include "i9xx_plane.h"
@@ -27,6 +28,7 @@
 #include "intel_drrs.h"
 #include "intel_dsi.h"
 #include "intel_fifo_underrun.h"
+#include "intel_histogram.h"
 #include "intel_pipe_crc.h"
 #include "intel_psr.h"
 #include "intel_sprite.h"
@@ -210,6 +212,7 @@ static struct intel_crtc *intel_crtc_alloc(void)
 static void intel_crtc_free(struct intel_crtc *crtc)
 {
 	intel_crtc_destroy_state(&crtc->base, crtc->base.state);
+	intel_histogram_finish(crtc);
 	kfree(crtc);
 }
 
@@ -229,6 +232,66 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
 	return 0;
 }
 
+static int intel_crtc_get_property(struct drm_crtc *crtc,
+				   const struct drm_crtc_state *state,
+				   struct drm_property *property,
+				   uint64_t *val)
+{
+	struct drm_i915_private *i915 = to_i915(crtc->dev);
+	const struct intel_crtc_state *intel_crtc_state =
+		to_intel_crtc_state(state);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	if (property == intel_crtc->histogram_en_property) {
+		*val = intel_crtc_state->histogram.histogram_enable;
+	} else if (property == intel_crtc->global_iet_property) {
+		*val = (intel_crtc_state->histogram.global_iet) ?
+			intel_crtc_state->histogram.global_iet->base.id : 0;
+	} else if (property == intel_crtc->histogram_property) {
+		*val = (intel_crtc_state->histogram.histogram) ?
+			intel_crtc_state->histogram.histogram->base.id : 0;
+	} else {
+		drm_err(&i915->drm,
+			"Unknown property [PROP:%d:%s]\n",
+			property->base.id, property->name);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int intel_crtc_set_property(struct drm_crtc *crtc,
+				   struct drm_crtc_state *state,
+				   struct drm_property *property,
+				   u64 val)
+{
+	struct drm_i915_private *i915 = to_i915(crtc->dev);
+	struct intel_crtc_state *intel_crtc_state =
+		to_intel_crtc_state(state);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	bool replaced = false;
+
+	if (property == intel_crtc->histogram_en_property) {
+		intel_crtc_state->histogram.histogram_enable = val;
+		return 0;
+	}
+
+	if (property == intel_crtc->global_iet_property) {
+		drm_property_replace_blob_from_id(crtc->dev,
+						  &intel_crtc_state->histogram.global_iet,
+						  val,
+						  sizeof(uint32_t) * HISTOGRAM_IET_LENGTH,
+						  -1, &replaced);
+		if (replaced)
+			intel_crtc_state->histogram.global_iet_changed = true;
+		return 0;
+	}
+
+	drm_dbg_atomic(&i915->drm, "Unknown property [PROP:%d:%s]\n",
+		       property->base.id, property->name);
+	return -EINVAL;
+}
+
 #define INTEL_CRTC_FUNCS \
 	.set_config = drm_atomic_helper_set_config, \
 	.destroy = intel_crtc_destroy, \
@@ -238,7 +301,9 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
 	.set_crc_source = intel_crtc_set_crc_source, \
 	.verify_crc_source = intel_crtc_verify_crc_source, \
 	.get_crc_sources = intel_crtc_get_crc_sources, \
-	.late_register = intel_crtc_late_register
+	.late_register = intel_crtc_late_register, \
+	.atomic_set_property = intel_crtc_set_property, \
+	.atomic_get_property = intel_crtc_get_property
 
 static const struct drm_crtc_funcs bdw_crtc_funcs = {
 	INTEL_CRTC_FUNCS,
@@ -383,6 +448,10 @@ int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
 	intel_color_crtc_init(crtc);
 	intel_drrs_crtc_init(crtc);
 	intel_crtc_crc_init(crtc);
+	intel_histogram_init(crtc);
+
+	/* Initialize crtc properties */
+	intel_crtc_add_property(crtc);
 
 	cpu_latency_qos_add_request(&crtc->vblank_pm_qos, PM_QOS_DEFAULT_VALUE);
 
@@ -737,3 +806,100 @@ void intel_pipe_update_end(struct intel_atomic_state *state,
 out:
 	intel_psr_unlock(new_crtc_state);
 }
+
+static const struct drm_prop_enum_list histogram_enable_names[] = {
+	{ INTEL_HISTOGRAM_DISABLE, "Disable" },
+	{ INTEL_HISTOGRAM_ENABLE, "Enable" },
+};
+
+/**
+ * intel_attach_histogram_en_property() - add property to enable/disable histogram
+ * @intel_crtc: pointer to the struct intel_crtc on which the global histogram is to
+ *		be enabled/disabled
+ *
+ * "HISTOGRAM_EN" is the crtc propety to enable/disable global histogram
+ */
+void intel_attach_histogram_en_property(struct intel_crtc *intel_crtc)
+{
+	struct drm_crtc *crtc = &intel_crtc->base;
+	struct drm_device *dev = crtc->dev;
+	struct drm_property *prop;
+
+	prop = intel_crtc->histogram_en_property;
+	if (!prop) {
+		prop = drm_property_create_enum(dev, 0,
+						"Histogram_Enable",
+						histogram_enable_names,
+						ARRAY_SIZE(histogram_enable_names));
+		if (!prop)
+			return;
+
+		intel_crtc->histogram_en_property = prop;
+	}
+
+	drm_object_attach_property(&crtc->base, prop, 0);
+}
+
+/**
+ * intel_attach_global_iet_property() - add property to write Image Enhancement data
+ * @intel_crtc: pointer to the struct intel_crtc on which global histogram is enabled
+ *
+ * "Global IET" is the crtc property to write the Image Enhancement LUT binary data
+ */
+void intel_attach_global_iet_property(struct intel_crtc *intel_crtc)
+{
+	struct drm_crtc *crtc = &intel_crtc->base;
+	struct drm_device *dev = crtc->dev;
+	struct drm_property *prop;
+
+	prop = intel_crtc->global_iet_property;
+	if (!prop) {
+		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | DRM_MODE_PROP_ATOMIC,
+					   "Global IET", 0);
+		if (!prop)
+			return;
+
+		intel_crtc->global_iet_property = prop;
+	}
+
+	drm_object_attach_property(&crtc->base, prop, 0);
+}
+
+/**
+ * intel_attach_histogram_property() - crtc property to read the histogram.
+ * @intel_crtc: pointer to the struct intel_crtc on which the global histogram
+ *		was enabled.
+ * "Global Histogram" is the crtc property to read the binary histogram data.
+ */
+void intel_attach_histogram_property(struct intel_crtc *intel_crtc)
+{
+	struct drm_crtc *crtc = &intel_crtc->base;
+	struct drm_device *dev = crtc->dev;
+	struct drm_property *prop;
+	struct drm_property_blob *blob;
+
+	prop = intel_crtc->histogram_property;
+	if (!prop) {
+		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
+					   DRM_MODE_PROP_ATOMIC |
+					   DRM_MODE_PROP_IMMUTABLE,
+					   "Global Histogram", 0);
+		if (!prop)
+			return;
+
+		intel_crtc->histogram_property = prop;
+	}
+	blob = drm_property_create_blob(dev, sizeof(uint32_t) * HISTOGRAM_BIN_COUNT, NULL);
+	intel_crtc->config->histogram.histogram = blob;
+
+	drm_object_attach_property(&crtc->base, prop, blob->base.id);
+}
+
+int intel_crtc_add_property(struct intel_crtc *intel_crtc)
+{
+	intel_attach_histogram_en_property(intel_crtc);
+	intel_attach_histogram_property(intel_crtc);
+	intel_attach_global_iet_property(intel_crtc);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.h b/drivers/gpu/drm/i915/display/intel_crtc.h
index de54ae1deedf..4e0a3c43d4f8 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.h
+++ b/drivers/gpu/drm/i915/display/intel_crtc.h
@@ -7,6 +7,7 @@
 #define _INTEL_CRTC_H_
 
 #include <linux/types.h>
+#include <drm/drm_crtc.h>
 
 enum i9xx_plane_id;
 enum pipe;
@@ -59,4 +60,8 @@ void intel_wait_for_vblank_if_active(struct drm_i915_private *i915,
 				     enum pipe pipe);
 void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
 
+int intel_crtc_add_property(struct intel_crtc *intel_crtc);
+void intel_attach_histogram_en_property(struct intel_crtc *intel_crtc);
+void intel_attach_global_iet_property(struct intel_crtc *intel_crtc);
+void intel_attach_histogram_property(struct intel_crtc *intel_crtc);
 #endif
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e790a2de5b3d..0c3008a2d774 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -93,6 +93,7 @@
 #include "intel_fifo_underrun.h"
 #include "intel_frontbuffer.h"
 #include "intel_hdmi.h"
+#include "intel_histogram.h"
 #include "intel_hotplug.h"
 #include "intel_link_bw.h"
 #include "intel_lvds.h"
@@ -4607,6 +4608,10 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
 	if (ret)
 		return ret;
 
+	/* HISTOGRAM changed */
+	if (crtc_state->histogram.histogram_enable_changed)
+		return intel_histogram_atomic_check(crtc);
+
 	return 0;
 }
 
@@ -6826,6 +6831,11 @@ int intel_atomic_check(struct drm_device *dev,
 		if (new_crtc_state->uapi.scaling_filter !=
 		    old_crtc_state->uapi.scaling_filter)
 			new_crtc_state->uapi.mode_changed = true;
+
+		/* Histogram updates */
+		if (old_crtc_state->histogram.histogram_enable !=
+		    new_crtc_state->histogram.histogram_enable)
+			new_crtc_state->histogram.histogram_enable_changed = true;
 	}
 
 	intel_vrr_check_modeset(state);
@@ -7892,6 +7902,14 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 		 */
 		old_crtc_state->dsb_color_vblank = fetch_and_zero(&new_crtc_state->dsb_color_vblank);
 		old_crtc_state->dsb_commit = fetch_and_zero(&new_crtc_state->dsb_commit);
+
+		/* Re-Visit: HISTOGRAM related stuff */
+		if (new_crtc_state->histogram.histogram_enable_changed)
+			intel_histogram_update(crtc,
+					       new_crtc_state->histogram.histogram_enable);
+		if (new_crtc_state->histogram.global_iet_changed)
+			intel_histogram_set_iet_lut(crtc,
+						    (u32 *)new_crtc_state->histogram.global_iet->data);
 	}
 
 	/* Underruns don't always raise interrupts, so check manually */
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 351441efd10a..300e90998463 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1306,6 +1306,15 @@ struct intel_crtc_state {
 
 	/* LOBF flag */
 	bool has_lobf;
+
+	/* Histogram data */
+	struct {
+		int histogram_enable;
+		struct drm_property_blob *global_iet;
+		struct drm_property_blob *histogram;
+		bool global_iet_changed;
+		bool histogram_enable_changed;
+	} histogram;
 };
 
 enum intel_pipe_crc_source {
@@ -1415,6 +1424,10 @@ struct intel_crtc {
 	struct pm_qos_request vblank_pm_qos;
 
 	struct intel_histogram *histogram;
+	/* HISTOGRAM properties */
+	struct drm_property *histogram_en_property;
+	struct drm_property *global_iet_property;
+	struct drm_property *histogram_property;
 
 #ifdef CONFIG_DEBUG_FS
 	struct intel_pipe_crc pipe_crc;
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index 16f29923ef10..cba65f4260cd 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -82,6 +82,11 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
 	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
 		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
 	if (intel_histogram_get_data(intel_crtc)) {
+		drm_property_replace_global_blob(display->drm,
+				&intel_crtc->config->histogram.histogram,
+				sizeof(histogram->bin_data),
+				histogram->bin_data, &intel_crtc->base.base,
+				intel_crtc->histogram_property);
 		/* Notify user for Histogram rediness */
 		if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
 				       KOBJ_CHANGE, histogram_event))
@@ -203,6 +208,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc)
 
 	cancel_delayed_work(&histogram->work);
 	histogram->enable = false;
+	intel_crtc->config->histogram.histogram_enable = false;
 }
 
 int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable)
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (4 preceding siblings ...)
  2024-11-19 10:45 ` [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-20  9:09   ` Kandpal, Suraj
  2024-11-19 10:45 ` [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+ Arun R Murthy
                   ` (4 subsequent siblings)
  10 siblings, 1 reply; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

The delay counter for histogram does not reset and as a result the
histogram bin never gets updated. Workaround would be to use save and
restore histogram register.
Wa: 14014889975

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 drivers/gpu/drm/i915/display/intel_histogram.c  | 17 +++++++++++++++++
 .../gpu/drm/i915/display/intel_histogram_regs.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index cba65f4260cd..fdcc64677e96 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -74,6 +74,11 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
 	struct intel_display *display = to_intel_display(intel_crtc);
 	char *histogram_event[] = {"HISTOGRAM=1", NULL};
 
+	/* Wa: 14014889975 */
+	if (IS_DISPLAY_VER(display, 12, 13))
+		intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
+			     DPST_CTL_RESTORE, 0);
+
 	/*
 	 * TODO: PSR to be exited while reading the Histogram data
 	 * Set DPST_CTL Bin Reg function select to TC
@@ -94,6 +99,12 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
 				"sending HISTOGRAM event failed\n");
 	}
 
+	/* Wa: 14014889975 */
+	if (IS_DISPLAY_VER(display, 12, 13))
+		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt Delay Counter(bit 23:16) */
+		intel_de_write(display, DPST_CTL(intel_crtc->pipe), intel_de_read(display,
+			       DPST_CTL(intel_crtc->pipe)) | DPST_CTL_RESTORE);
+
 	/* Enable histogram interrupt */
 	intel_de_rmw(display, DPST_GUARD(intel_crtc->pipe), DPST_GUARD_HIST_INT_EN,
 		     DPST_GUARD_HIST_INT_EN);
@@ -240,6 +251,12 @@ int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data)
 		return -EINVAL;
 	}
 
+	/* Wa: 14014889975 */
+	if (IS_DISPLAY_VER(display, 12, 13))
+		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt Delay Counter(bit 23:16) */
+		intel_de_write(display, DPST_CTL(intel_crtc->pipe), intel_de_read(display,
+			       DPST_CTL(intel_crtc->pipe)) | DPST_CTL_RESTORE);
+
 	/*
 	 * Set DPST_CTL Bin Reg function select to IE
 	 * Set DPST_CTL Bin Register Index to 0
diff --git a/drivers/gpu/drm/i915/display/intel_histogram_regs.h b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
index 1252b4f339a6..e50b1448bd40 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
@@ -16,6 +16,7 @@
 #define  DPST_CTL_RESTORE				REG_BIT(28)
 #define  DPST_CTL_IE_MODI_TABLE_EN			REG_BIT(27)
 #define  DPST_CTL_HIST_MODE				REG_BIT(24)
+#define  DPST_CTL_GUARDBAND_INTERRUPT_DELAY_CNT		REG_GENMASK(23, 16)
 #define  DPST_CTL_ENHANCEMENT_MODE_MASK			REG_GENMASK(14, 13)
 #define  DPST_CTL_EN_MULTIPLICATIVE			REG_FIELD_PREP(DPST_CTL_ENHANCEMENT_MODE_MASK, 2)
 #define  DPST_CTL_IE_TABLE_VALUE_FORMAT			REG_BIT(15)
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (5 preceding siblings ...)
  2024-11-19 10:45 ` [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-20 10:25   ` Kandpal, Suraj
  2024-11-19 10:45 ` [PATCH 8/8] drm/i915/histogram: Enable pipe dithering Arun R Murthy
                   ` (3 subsequent siblings)
  10 siblings, 1 reply; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

In Display 20+, new registers are added for setting index, reading
histogram and writing the IET.

v2: Removed duplicate code (Jani)
v3: Moved histogram core changes to earlier patches (Jani/Suraj)
v4: Rebased after addressing comments on patch 1

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 .../gpu/drm/i915/display/intel_histogram.c    | 111 +++++++++++++-----
 .../drm/i915/display/intel_histogram_regs.h   |  25 ++++
 2 files changed, 105 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index fdcc64677e96..beaad9256e01 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -29,6 +29,51 @@ struct intel_histogram {
 	u32 bin_data[HISTOGRAM_BIN_COUNT];
 };
 
+static void set_bin_index_0(struct intel_display *display, enum pipe pipe)
+{
+	if (DISPLAY_VER(display) >= 20)
+		intel_de_rmw(display, DPST_IE_INDEX(pipe),
+			     DPST_IE_BIN_INDEX_MASK, DPST_IE_BIN_INDEX(0));
+	else
+		intel_de_rmw(display, DPST_CTL(pipe),
+			     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK,
+			     DPST_CTL_BIN_REG_FUNC_IE | DPST_CTL_BIN_REG_CLEAR);
+}
+
+static void write_iet(struct intel_display *display, enum pipe pipe,
+			      u32 *data)
+{
+	int i;
+
+	if (DISPLAY_VER(display) >= 20) {
+		for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
+			intel_de_rmw(display, DPST_IE_BIN(pipe),
+				     DPST_IE_BIN_DATA_MASK,
+				     DPST_IE_BIN_DATA(data[i]));
+			drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
+				       i, data[i]);
+		}
+	} else {
+		for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
+			intel_de_rmw(display, DPST_BIN(pipe),
+				     DPST_BIN_DATA_MASK, data[i]);
+			drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
+				       i, data[i]);
+		}
+	}
+}
+
+static void set_histogram_index_0(struct intel_display *display, enum pipe pipe)
+{
+	if (DISPLAY_VER(display) >= 20)
+		intel_de_rmw(display, DPST_HIST_INDEX(pipe),
+			     DPST_HIST_BIN_INDEX_MASK,
+			     DPST_HIST_BIN_INDEX(0));
+	else
+		intel_de_rmw(display, DPST_CTL(pipe),
+			     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
+}
+
 static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
 {
 	struct intel_display *display = to_intel_display(intel_crtc);
@@ -40,9 +85,13 @@ static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
 	retry_count = 0;
 
 	while (index < HISTOGRAM_BIN_COUNT) {
-		dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe));
+		dpstbin = intel_de_read(display, (DISPLAY_VER(display) >= 20 ?
+					DPST_HIST_BIN(intel_crtc->pipe) :
+					DPST_BIN(intel_crtc->pipe)));
 		if (!(dpstbin & DPST_BIN_BUSY)) {
-			histogram->bin_data[index] = dpstbin & DPST_BIN_DATA_MASK;
+			histogram->bin_data[index] = dpstbin & (DISPLAY_VER(display) >= 20 ?
+							        DPST_HIST_BIN_DATA_MASK :
+							        DPST_BIN_DATA_MASK);
 			index++;
 		} else {
 			/*
@@ -58,9 +107,7 @@ static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
 			/* Add a delay before retrying */
 			fsleep(HISTOGRAM_BIN_READ_DELAY);
 			index = 0;
-			intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
-				     DPST_CTL_BIN_REG_FUNC_SEL |
-				     DPST_CTL_BIN_REG_MASK, 0);
+			set_histogram_index_0(display, intel_crtc->pipe);
 		}
 	}
 	return true;
@@ -84,8 +131,8 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
 	 * Set DPST_CTL Bin Reg function select to TC
 	 * Set DPST_CTL Bin Register Index to 0
 	 */
-	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
-		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
+	set_histogram_index_0(display, intel_crtc->pipe);
+
 	if (intel_histogram_get_data(intel_crtc)) {
 		drm_property_replace_global_blob(display->drm,
 				&intel_crtc->config->histogram.histogram,
@@ -158,13 +205,20 @@ static int intel_histogram_enable(struct intel_crtc *intel_crtc)
 	if (histogram->enable)
 		return 0;
 
-	 /* enable histogram, clear DPST_BIN reg and select TC function */
-	intel_de_rmw(display, DPST_CTL(pipe),
-		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
-		     DPST_CTL_HIST_MODE | DPST_CTL_IE_TABLE_VALUE_FORMAT,
-		     DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
-		     DPST_CTL_HIST_MODE_HSV |
-		     DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
+	if (DISPLAY_VER(display) >= 20)
+		intel_de_rmw(display, DPST_CTL(pipe),
+			     DPST_CTL_IE_HIST_EN |
+			     DPST_CTL_HIST_MODE,
+			     DPST_CTL_IE_HIST_EN |
+			     DPST_CTL_HIST_MODE_HSV);
+	else
+		 /* enable histogram, clear DPST_BIN reg and select TC function */
+		intel_de_rmw(display, DPST_CTL(pipe),
+			     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
+			     DPST_CTL_HIST_MODE | DPST_CTL_IE_TABLE_VALUE_FORMAT,
+			     DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
+			     DPST_CTL_HIST_MODE_HSV |
+			     DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
 
 	/* Re-Visit: check if wait for one vblank is required */
 	drm_crtc_wait_one_vblank(&intel_crtc->base);
@@ -236,7 +290,6 @@ int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data)
 	struct intel_histogram *histogram = intel_crtc->histogram;
 	struct intel_display *display = to_intel_display(intel_crtc);
 	int pipe = intel_crtc->pipe;
-	int i = 0;
 
 	if (!histogram)
 		return -EINVAL;
@@ -261,24 +314,20 @@ int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data)
 	 * Set DPST_CTL Bin Reg function select to IE
 	 * Set DPST_CTL Bin Register Index to 0
 	 */
-	intel_de_rmw(display, DPST_CTL(pipe),
-		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK,
-		     DPST_CTL_BIN_REG_FUNC_IE | DPST_CTL_BIN_REG_CLEAR);
-
-	for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
-		intel_de_rmw(display, DPST_BIN(pipe),
-			     DPST_BIN_DATA_MASK, data[i]);
-		drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i, data[i]);
+	set_bin_index_0(display, pipe);
+	write_iet(display, pipe, data);
+	if (DISPLAY_VER(display) < 20) {
+		intel_de_rmw(display, DPST_CTL(pipe),
+			     DPST_CTL_ENHANCEMENT_MODE_MASK |
+			     DPST_CTL_IE_MODI_TABLE_EN,
+			     DPST_CTL_EN_MULTIPLICATIVE |
+			     DPST_CTL_IE_MODI_TABLE_EN);
+		/* Once IE is applied, change DPST CTL to TC */
+		intel_de_rmw(display, DPST_CTL(pipe),
+			     DPST_CTL_BIN_REG_FUNC_SEL,
+			     DPST_CTL_BIN_REG_FUNC_TC);
 	}
 
-	intel_de_rmw(display, DPST_CTL(pipe),
-		     DPST_CTL_ENHANCEMENT_MODE_MASK | DPST_CTL_IE_MODI_TABLE_EN,
-		     DPST_CTL_EN_MULTIPLICATIVE | DPST_CTL_IE_MODI_TABLE_EN);
-
-	/* Once IE is applied, change DPST CTL to TC */
-	intel_de_rmw(display, DPST_CTL(pipe),
-		     DPST_CTL_BIN_REG_FUNC_SEL, DPST_CTL_BIN_REG_FUNC_TC);
-
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_histogram_regs.h b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
index e50b1448bd40..2a52ac9282c1 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
@@ -44,6 +44,31 @@
 #define _DPST_BIN_B					0x491C4
 #define DPST_BIN(pipe)					_MMIO_PIPE(pipe, _DPST_BIN_A, _DPST_BIN_B)
 #define  DPST_BIN_DATA_MASK				REG_GENMASK(23, 0)
+#define  DPST_BIN_DATA					REG_FIELD_PREP(DPST_BIN_DATA_MASK, val)
 #define  DPST_BIN_BUSY					REG_BIT(31)
 
+#define _DPST_HIST_INDEX_A				0x490D8
+#define _DPST_HIST_INDEX_B				0x491D8
+#define DPST_HIST_INDEX(pipe)				_MMIO_PIPE(pipe, _DPST_HIST_INDEX_A, _DPST_HIST_INDEX_B)
+#define  DPST_HIST_BIN_INDEX_MASK			REG_GENMASK(4, 0)
+#define  DPST_HIST_BIN_INDEX(val)			REG_FIELD_PREP(DPST_HIST_BIN_INDEX_MASK, val)
+
+#define _DPST_HIST_BIN_A				0x490C4
+#define _DPST_HIST_BIN_B				0x491C4
+#define DPST_HIST_BIN(pipe)				_MMIO_PIPE(pipe, _DPST_HIST_BIN_A, _DPST_HIST_BIN_B)
+#define  DPST_HIST_BIN_BUSY				REG_BIT(31)
+#define  DPST_HIST_BIN_DATA_MASK				REG_GENMASK(30, 0)
+
+#define _DPST_IE_BIN_A					0x490CC
+#define _DPST_IE_BIN_B					0x491CC
+#define DPST_IE_BIN(pipe)				_MMIO_PIPE(pipe, _DPST_IE_BIN_A, _DPST_IE_BIN_B)
+#define	 DPST_IE_BIN_DATA_MASK				REG_GENMASK(9, 0)
+#define  DPST_IE_BIN_DATA(val)				REG_FIELD_PREP(DPST_IE_BIN_DATA_MASK, val)
+
+#define _DPST_IE_INDEX_A				0x490DC
+#define _DPST_IE_INDEX_B				0x491DC
+#define DPST_IE_INDEX(pipe)				_MMIO_PIPE(pipe, _DPST_IE_INDEX_A, _DPST_IE_INDEX_B)
+#define  DPST_IE_BIN_INDEX_MASK				REG_GENMASK(6, 0)
+#define  DPST_IE_BIN_INDEX(val)				REG_FIELD_PREP(DPST_IE_BIN_INDEX_MASK, val)
+
 #endif /* __INTEL_HISTOGRAM_REGS_H__ */
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* [PATCH 8/8] drm/i915/histogram: Enable pipe dithering
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (6 preceding siblings ...)
  2024-11-19 10:45 ` [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+ Arun R Murthy
@ 2024-11-19 10:45 ` Arun R Murthy
  2024-11-20  9:13   ` Kandpal, Suraj
  2024-11-19 11:33 ` ✗ Fi.CI.CHECKPATCH: warning for Display Global Histogram (rev6) Patchwork
                   ` (2 subsequent siblings)
  10 siblings, 1 reply; 28+ messages in thread
From: Arun R Murthy @ 2024-11-19 10:45 UTC (permalink / raw)
  To: intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

Enable pipe dithering while enabling histogram to overcome some
atrifacts seen on the screen.

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
---
 drivers/gpu/drm/i915/display/intel_histogram.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index beaad9256e01..d3c63da7e491 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -29,6 +29,13 @@ struct intel_histogram {
 	u32 bin_data[HISTOGRAM_BIN_COUNT];
 };
 
+static void intel_histogram_enable_dithering(struct intel_display *display,
+					     enum pipe pipe)
+{
+	intel_de_rmw(display, PIPE_MISC(pipe), PIPE_MISC_DITHER_ENABLE,
+		     PIPE_MISC_DITHER_ENABLE);
+}
+
 static void set_bin_index_0(struct intel_display *display, enum pipe pipe)
 {
 	if (DISPLAY_VER(display) >= 20)
@@ -205,6 +212,9 @@ static int intel_histogram_enable(struct intel_crtc *intel_crtc)
 	if (histogram->enable)
 		return 0;
 
+	/* Pipe Dithering should be enabled with histogram */
+	intel_histogram_enable_dithering(display, pipe);
+
 	if (DISPLAY_VER(display) >= 20)
 		intel_de_rmw(display, DPST_CTL(pipe),
 			     DPST_CTL_IE_HIST_EN |
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 28+ messages in thread

* ✗ Fi.CI.CHECKPATCH: warning for Display Global Histogram (rev6)
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (7 preceding siblings ...)
  2024-11-19 10:45 ` [PATCH 8/8] drm/i915/histogram: Enable pipe dithering Arun R Murthy
@ 2024-11-19 11:33 ` Patchwork
  2024-11-19 11:33 ` ✗ Fi.CI.SPARSE: " Patchwork
  2024-11-19 12:39 ` [PATCHv5 0/8] Display Global Histogram Daniel Stone
  10 siblings, 0 replies; 28+ messages in thread
From: Patchwork @ 2024-11-19 11:33 UTC (permalink / raw)
  To: Arun R Murthy; +Cc: intel-gfx

== Series Details ==

Series: Display Global Histogram (rev6)
URL   : https://patchwork.freedesktop.org/series/135793/
State : warning

== Summary ==

Error: dim checkpatch failed
ea9d7335b8ed drm/i915/histogram: Define registers for histogram
-:13: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#13: 
new file mode 100644

-:18: WARNING:SPDX_LICENSE_TAG: Improper SPDX comment style for 'drivers/gpu/drm/i915/display/intel_histogram_regs.h', please use '/*' instead
#18: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:1:
+// SPDX-License-Identifier: MIT

-:18: WARNING:SPDX_LICENSE_TAG: Missing or malformed SPDX-License-Identifier tag in line 1
#18: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:1:
+// SPDX-License-Identifier: MIT

-:37: WARNING:LONG_LINE: line length of 105 exceeds 100 columns
#37: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:20:
+#define  DPST_CTL_EN_MULTIPLICATIVE			REG_FIELD_PREP(DPST_CTL_ENHANCEMENT_MODE_MASK, 2)

-:44: WARNING:LONG_LINE: line length of 105 exceeds 100 columns
#44: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:27:
+#define  DPST_CTL_IE_TABLE_VALUE_FORMAT_2INT_8FRAC	REG_FIELD_PREP(DPST_CTL_IE_TABLE_VALUE_FORMAT, 1)

-:45: WARNING:LONG_LINE: line length of 105 exceeds 100 columns
#45: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:28:
+#define  DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC	REG_FIELD_PREP(DPST_CTL_IE_TABLE_VALUE_FORMAT, 0)

-:51: WARNING:LONG_LINE: line length of 102 exceeds 100 columns
#51: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:34:
+#define DPST_GUARD(pipe)				_MMIO_PIPE(pipe, _DPST_GUARD_A, _DPST_GUARD_B)

-:55: WARNING:LONG_LINE: line length of 116 exceeds 100 columns
#55: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:38:
+#define  DPST_GUARD_INTERRUPT_DELAY(val)			REG_FIELD_PREP(DPST_GUARD_INTERRUPT_DELAY_MASK, val)

-:57: WARNING:LONG_LINE: line length of 105 exceeds 100 columns
#57: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:40:
+#define  DPST_GUARD_THRESHOLD_GB(val)			REG_FIELD_PREP(DPST_GUARD_THRESHOLD_GB_MASK, val)

total: 0 errors, 9 warnings, 0 checks, 48 lines checked
f2d78cdc8a07 drm/i915/histogram: Add support for histogram
-:46: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#46: 
new file mode 100644

-:236: WARNING:BRACES: braces {} are not necessary for single statement blocks
#236: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:186:
+	if (!histogram) {
+		return -ENOMEM;
+	}

-:252: WARNING:SPDX_LICENSE_TAG: Improper SPDX comment style for 'drivers/gpu/drm/i915/display/intel_histogram.h', please use '/*' instead
#252: FILE: drivers/gpu/drm/i915/display/intel_histogram.h:1:
+// SPDX-License-Identifier: MIT

-:252: WARNING:SPDX_LICENSE_TAG: Missing or malformed SPDX-License-Identifier tag in line 1
#252: FILE: drivers/gpu/drm/i915/display/intel_histogram.h:1:
+// SPDX-License-Identifier: MIT

total: 0 errors, 4 warnings, 0 checks, 245 lines checked
f303a335aa40 drm/xe: Add histogram support to Xe builds
02b2ba5e8080 drm/i915/histogram: histogram interrupt handling
-:6: WARNING:TYPO_SPELLING: 'trigerred' may be misspelled - perhaps 'triggered'?
#6: 
Upon enabling histogram an interrupt is trigerred after the generation
                                        ^^^^^^^^^

-:109: WARNING:STATIC_CONST_CHAR_ARRAY: char * array declaration might be better as static const
#109: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:75:
+	char *histogram_event[] = {"HISTOGRAM=1", NULL};

total: 0 errors, 2 warnings, 0 checks, 184 lines checked
fb80f196e567 drm/i915/histogram: Add crtc properties for global histogram
-:336: WARNING:LONG_LINE: line length of 103 exceeds 100 columns
#336: FILE: drivers/gpu/drm/i915/display/intel_display.c:7917:
+						    (u32 *)new_crtc_state->histogram.global_iet->data);

-:380: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#380: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:86:
+		drm_property_replace_global_blob(display->drm,
+				&intel_crtc->config->histogram.histogram,

total: 0 errors, 1 warnings, 1 checks, 330 lines checked
507a7e9a2ee8 drm/i915/histogram: histogram delay counter doesnt reset
-:4: WARNING:TYPO_SPELLING: 'doesnt' may be misspelled - perhaps 'doesn't'?
#4: 
Subject: [PATCH] drm/i915/histogram: histogram delay counter doesnt reset
                                                             ^^^^^^

-:35: WARNING:LONG_LINE_COMMENT: line length of 103 exceeds 100 columns
#35: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:104:
+		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt Delay Counter(bit 23:16) */

-:37: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#37: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:106:
+		intel_de_write(display, DPST_CTL(intel_crtc->pipe), intel_de_read(display,
+			       DPST_CTL(intel_crtc->pipe)) | DPST_CTL_RESTORE);

-:48: WARNING:LONG_LINE_COMMENT: line length of 103 exceeds 100 columns
#48: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:256:
+		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt Delay Counter(bit 23:16) */

-:50: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#50: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:258:
+		intel_de_write(display, DPST_CTL(intel_crtc->pipe), intel_de_read(display,
+			       DPST_CTL(intel_crtc->pipe)) | DPST_CTL_RESTORE);

total: 0 errors, 3 warnings, 2 checks, 42 lines checked
d53808ff25bd drm/i915/histogram: Histogram changes for Display 20+
-:35: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#35: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:44:
+static void write_iet(struct intel_display *display, enum pipe pipe,
+			      u32 *data)

-:82: ERROR:CODE_INDENT: code indent should use tabs where possible
#82: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:93:
+^I^I^I^I^I^I^I        DPST_HIST_BIN_DATA_MASK :$

-:83: ERROR:CODE_INDENT: code indent should use tabs where possible
#83: FILE: drivers/gpu/drm/i915/display/intel_histogram.c:94:
+^I^I^I^I^I^I^I        DPST_BIN_DATA_MASK);$

-:195: WARNING:LONG_LINE: line length of 112 exceeds 100 columns
#195: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:52:
+#define DPST_HIST_INDEX(pipe)				_MMIO_PIPE(pipe, _DPST_HIST_INDEX_A, _DPST_HIST_INDEX_B)

-:197: WARNING:LONG_LINE: line length of 101 exceeds 100 columns
#197: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:54:
+#define  DPST_HIST_BIN_INDEX(val)			REG_FIELD_PREP(DPST_HIST_BIN_INDEX_MASK, val)

-:201: WARNING:LONG_LINE: line length of 108 exceeds 100 columns
#201: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:58:
+#define DPST_HIST_BIN(pipe)				_MMIO_PIPE(pipe, _DPST_HIST_BIN_A, _DPST_HIST_BIN_B)

-:207: WARNING:LONG_LINE: line length of 104 exceeds 100 columns
#207: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:64:
+#define DPST_IE_BIN(pipe)				_MMIO_PIPE(pipe, _DPST_IE_BIN_A, _DPST_IE_BIN_B)

-:213: WARNING:LONG_LINE: line length of 108 exceeds 100 columns
#213: FILE: drivers/gpu/drm/i915/display/intel_histogram_regs.h:70:
+#define DPST_IE_INDEX(pipe)				_MMIO_PIPE(pipe, _DPST_IE_INDEX_A, _DPST_IE_INDEX_B)

total: 2 errors, 5 warnings, 1 checks, 187 lines checked
e138a9cfa004 drm/i915/histogram: Enable pipe dithering



^ permalink raw reply	[flat|nested] 28+ messages in thread

* ✗ Fi.CI.SPARSE: warning for Display Global Histogram (rev6)
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (8 preceding siblings ...)
  2024-11-19 11:33 ` ✗ Fi.CI.CHECKPATCH: warning for Display Global Histogram (rev6) Patchwork
@ 2024-11-19 11:33 ` Patchwork
  2024-11-19 12:39 ` [PATCHv5 0/8] Display Global Histogram Daniel Stone
  10 siblings, 0 replies; 28+ messages in thread
From: Patchwork @ 2024-11-19 11:33 UTC (permalink / raw)
  To: Arun R Murthy; +Cc: intel-gfx

== Series Details ==

Series: Display Global Histogram (rev6)
URL   : https://patchwork.freedesktop.org/series/135793/
State : warning

== Summary ==

Error: dim sparse failed
Sparse version: v0.6.2
Fast mode used, each commit won't be checked separately.
-
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:116:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:147:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:149:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:153:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:155:16: warning: unreplaced symbol 'oldbit'



^ permalink raw reply	[flat|nested] 28+ messages in thread

* Re: [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling
  2024-11-19 10:45 ` [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling Arun R Murthy
@ 2024-11-19 11:36   ` Jani Nikula
  2024-11-21  3:08     ` Murthy, Arun R
  0 siblings, 1 reply; 28+ messages in thread
From: Jani Nikula @ 2024-11-19 11:36 UTC (permalink / raw)
  To: Arun R Murthy, intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

On Tue, 19 Nov 2024, Arun R Murthy <arun.r.murthy@intel.com> wrote:
> Upon enabling histogram an interrupt is trigerred after the generation
> of the statistics. This patch registers the histogram interrupt and
> handles the interrupt.
>
> v2: Added intel_crtc backpointer to intel_histogram struct (Jani)
>     Removed histogram_wq and instead use dev_priv->unodered_eq (Jani)
> v3: Replaced drm_i915_private with intel_display (Suraj)
>     Refactored the histogram read code (Jani)
> v4: Rebased after addressing comments on patch 1
>
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  .../gpu/drm/i915/display/intel_display_irq.c  |  6 +-
>  .../gpu/drm/i915/display/intel_histogram.c    | 93 +++++++++++++++++++
>  .../gpu/drm/i915/display/intel_histogram.h    |  3 +
>  drivers/gpu/drm/i915/i915_reg.h               |  5 +-
>  4 files changed, 104 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c b/drivers/gpu/drm/i915/display/intel_display_irq.c
> index f0d3bdb5fc60..cb60c9db4418 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_irq.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c
> @@ -20,6 +20,7 @@
>  #include "intel_fdi_regs.h"
>  #include "intel_fifo_underrun.h"
>  #include "intel_gmbus.h"
> +#include "intel_histogram.h"
>  #include "intel_hotplug_irq.h"
>  #include "intel_pipe_crc_regs.h"
>  #include "intel_pmdemand.h"
> @@ -1179,6 +1180,9 @@ void gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
>  		if (iir & GEN8_PIPE_FIFO_UNDERRUN)
>  			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
>  
> +		if (iir & GEN9_PIPE_HISTOGRAM_EVENT)
> +			intel_histogram_irq_handler(display, pipe);
> +
>  		fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv);
>  		if (fault_errors)
>  			drm_err_ratelimited(&dev_priv->drm,
> @@ -1764,7 +1768,7 @@ void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
>  	struct intel_uncore *uncore = &dev_priv->uncore;
>  
>  	u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) |
> -		GEN8_PIPE_CDCLK_CRC_DONE;
> +		GEN8_PIPE_CDCLK_CRC_DONE | GEN9_PIPE_HISTOGRAM_EVENT;
>  	u32 de_pipe_enables;
>  	u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
>  	u32 de_port_enables;
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
> index e751977fc6f7..16f29923ef10 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -18,6 +18,8 @@
>  #define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300    // 3.0% of the pipe's current pixel count.
>  #define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000   // Precision factor for threshold guardband.
>  #define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04
> +#define HISTOGRAM_BIN_READ_RETRY_COUNT 5
> +#define HISTOGRAM_BIN_READ_DELAY 2

The above are only used once each. Please just put the values
inline. Here, you don't even know what "2" means without looking up the
code.

>  
>  struct intel_histogram {
>  	struct intel_crtc *crtc;
> @@ -27,6 +29,92 @@ struct intel_histogram {
>  	u32 bin_data[HISTOGRAM_BIN_COUNT];
>  };
>  
> +static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
> +{
> +	struct intel_display *display = to_intel_display(intel_crtc);
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +	u8 index, retry_count;

These should be ints.

> +	u32 dpstbin;
> +
> +	index = 0;
> +	retry_count = 0;
> +
> +	while (index < HISTOGRAM_BIN_COUNT) {

This should be a for loop

	for (index = 0; index < ARRAY_SIZE(histogram->bin_data); i++)

Any retries should be handled in a separate loop instead of abusing the
top level loop for two things.

Based on how this is now, looks like the retry loop should be outside of
this function altogether? I.e. a single busy response leads to retry
from start?

> +		dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe));
> +		if (!(dpstbin & DPST_BIN_BUSY)) {
> +			histogram->bin_data[index] = dpstbin & DPST_BIN_DATA_MASK;
> +			index++;
> +		} else {
> +			/*
> +			 * If DPST_BIN busy bit is set, then set the
> +			 * DPST_CTL bin reg index to 0 and proceed
> +			 * from beginning.
> +			 */

That's just saying the same thing as the code in English. What's the
point?

> +			retry_count++;
> +			if (retry_count > HISTOGRAM_BIN_READ_RETRY_COUNT) {
> +				drm_err(display->drm, "Histogram bin read failed with max retry\n");
> +				return false;
> +			}
> +			/* Add a delay before retrying */

The comment says the same thing as the code.

> +			fsleep(HISTOGRAM_BIN_READ_DELAY);
> +			index = 0;
> +			intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> +				     DPST_CTL_BIN_REG_FUNC_SEL |
> +				     DPST_CTL_BIN_REG_MASK, 0);

This is duplicated; see the retry loop placement.

> +		}
> +	}
> +	return true;
> +}
> +
> +static void intel_histogram_handle_int_work(struct work_struct *work)
> +{
> +	struct intel_histogram *histogram = container_of(work,
> +		struct intel_histogram, work.work);
> +	struct intel_crtc *intel_crtc = histogram->crtc;
> +	struct intel_display *display = to_intel_display(intel_crtc);
> +	char *histogram_event[] = {"HISTOGRAM=1", NULL};

Not sure it's great that this is a global uevent instead of having more
detailed information. Maybe it should have the CRTC details?

> +
> +	/*
> +	 * TODO: PSR to be exited while reading the Histogram data
> +	 * Set DPST_CTL Bin Reg function select to TC
> +	 * Set DPST_CTL Bin Register Index to 0
> +	 */
> +	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> +		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
> +	if (intel_histogram_get_data(intel_crtc)) {
> +		/* Notify user for Histogram rediness */
> +		if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
> +				       KOBJ_CHANGE, histogram_event))
> +			drm_err(display->drm,
> +				"sending HISTOGRAM event failed\n");
> +	}

So you probably want to add the retry loop here. This avoids duplicating
the DPST_CTL rmw.

> +
> +	/* Enable histogram interrupt */
> +	intel_de_rmw(display, DPST_GUARD(intel_crtc->pipe), DPST_GUARD_HIST_INT_EN,
> +		     DPST_GUARD_HIST_INT_EN);
> +
> +	/* Clear histogram interrupt by setting histogram interrupt status bit*/
> +	intel_de_rmw(display, DPST_GUARD(intel_crtc->pipe),
> +		     DPST_GUARD_HIST_EVENT_STATUS, 1);
> +}
> +
> +void intel_histogram_irq_handler(struct intel_display *display, enum pipe pipe)
> +{
> +	struct intel_crtc *intel_crtc =
> +		to_intel_crtc(drm_crtc_from_index(display->drm, pipe));
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +	struct drm_i915_private *i915 = to_i915(intel_crtc->base.dev);
> +
> +	if (!histogram->enable) {
> +		drm_err(display->drm,
> +			"spurious interrupt, histogram not enabled\n");
> +		return;
> +	}
> +
> +	queue_delayed_work(i915->unordered_wq,
> +			   &histogram->work, 0);
> +}
> +
>  int intel_histogram_atomic_check(struct intel_crtc *intel_crtc)
>  {
>  	struct intel_histogram *histogram = intel_crtc->histogram;
> @@ -113,6 +201,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc)
>  	intel_de_rmw(display, DPST_CTL(pipe),
>  		     DPST_CTL_IE_HIST_EN, 0);
>  
> +	cancel_delayed_work(&histogram->work);
>  	histogram->enable = false;
>  }
>  
> @@ -174,6 +263,7 @@ void intel_histogram_finish(struct intel_crtc *intel_crtc)
>  {
>  	struct intel_histogram *histogram = intel_crtc->histogram;
>  
> +	cancel_delayed_work_sync(&histogram->work);
>  	kfree(histogram);
>  }
>  
> @@ -191,5 +281,8 @@ int intel_histogram_init(struct intel_crtc *intel_crtc)
>  	histogram->crtc = intel_crtc;
>  	histogram->can_enable = false;
>  
> +	INIT_DEFERRABLE_WORK(&histogram->work,
> +			     intel_histogram_handle_int_work);
> +
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h b/drivers/gpu/drm/i915/display/intel_histogram.h
> index 9d66724f9c53..14f2425e3038 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.h
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.h
> @@ -9,6 +9,8 @@
>  #include <linux/types.h>
>  
>  struct intel_crtc;
> +struct intel_display;
> +enum pipe;
>  
>  #define HISTOGRAM_BIN_COUNT                    32
>  #define HISTOGRAM_IET_LENGTH                   33
> @@ -27,6 +29,7 @@ enum intel_global_hist_lut {
>  };
>  
>  int intel_histogram_atomic_check(struct intel_crtc *intel_crtc);
> +void intel_histogram_irq_handler(struct intel_display *display, enum pipe pipe);
>  int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable);
>  int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data);
>  int intel_histogram_init(struct intel_crtc *intel_crtc);
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 7a35be56b7ef..40a7c6a77bcc 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -1605,7 +1605,7 @@
>  #define   PIPE_HOTPLUG_INTERRUPT_ENABLE		(1UL << 26)
>  #define   PIPE_VSYNC_INTERRUPT_ENABLE		(1UL << 25)
>  #define   PIPE_DISPLAY_LINE_COMPARE_ENABLE	(1UL << 24)
> -#define   PIPE_DPST_EVENT_ENABLE		(1UL << 23)
> +#define   PIPE_HISTOGRAM_EVENT_ENABLE		(1UL << 23)
>  #define   SPRITE0_FLIP_DONE_INT_EN_VLV		(1UL << 22)
>  #define   PIPE_LEGACY_BLC_EVENT_ENABLE		(1UL << 22)
>  #define   PIPE_ODD_FIELD_INTERRUPT_ENABLE	(1UL << 21)
> @@ -1628,7 +1628,7 @@
>  #define   PIPE_HOTPLUG_INTERRUPT_STATUS		(1UL << 10)
>  #define   PIPE_VSYNC_INTERRUPT_STATUS		(1UL << 9)
>  #define   PIPE_DISPLAY_LINE_COMPARE_STATUS	(1UL << 8)
> -#define   PIPE_DPST_EVENT_STATUS		(1UL << 7)
> +#define   PIPE_HISTOGRAM_EVENT_STATUS		(1UL << 7)
>  #define   PIPE_A_PSR_STATUS_VLV			(1UL << 6)
>  #define   PIPE_LEGACY_BLC_EVENT_STATUS		(1UL << 6)
>  #define   PIPE_ODD_FIELD_INTERRUPT_STATUS	(1UL << 5)
> @@ -2470,6 +2470,7 @@
>  #define  GEN12_DSB_1_INT		REG_BIT(14) /* tgl+ */
>  #define  GEN12_DSB_0_INT		REG_BIT(13) /* tgl+ */
>  #define  GEN12_DSB_INT(dsb_id)		REG_BIT(13 + (dsb_id))
> +#define  GEN9_PIPE_HISTOGRAM_EVENT	REG_BIT(12) /* skl+ */
>  #define  GEN9_PIPE_CURSOR_FAULT		REG_BIT(11) /* skl+ */
>  #define  GEN9_PIPE_PLANE4_FAULT		REG_BIT(10) /* skl+ */
>  #define  GEN8_PIPE_CURSOR_FAULT		REG_BIT(10) /* bdw */

-- 
Jani Nikula, Intel

^ permalink raw reply	[flat|nested] 28+ messages in thread

* Re: [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram
  2024-11-19 10:45 ` [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram Arun R Murthy
@ 2024-11-19 11:41   ` Jani Nikula
  2024-11-20  8:33   ` Kandpal, Suraj
  1 sibling, 0 replies; 28+ messages in thread
From: Jani Nikula @ 2024-11-19 11:41 UTC (permalink / raw)
  To: Arun R Murthy, intel-xe, intel-gfx, dri-devel; +Cc: Arun R Murthy

On Tue, 19 Nov 2024, Arun R Murthy <arun.r.murthy@intel.com> wrote:
> CRTC properties have been added for enable/disable histogram, reading
> the histogram data and writing the IET data.
> "HISTOGRAM_EN" is the crtc property to enable/disable the global
> histogram and takes a value 0/1 accordingly.
> "Histogram" is a crtc property to read the binary histogram data.
> "Global IET" is a crtc property to write the IET binary LUT data.
>
> v2: Read the histogram blob data before sending uevent (Jani)
> v3: use drm_property_replace_blob_from_id (Vandita)
>     Add substruct for histogram in intel_crtc_state (Jani)
> v4:  Rebased after addressing comments on patch 1
> v5: histogram check with old/new crtc_state (Suraj)
>
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_atomic.c   |   5 +
>  drivers/gpu/drm/i915/display/intel_crtc.c     | 168 +++++++++++++++++-
>  drivers/gpu/drm/i915/display/intel_crtc.h     |   5 +
>  drivers/gpu/drm/i915/display/intel_display.c  |  18 ++
>  .../drm/i915/display/intel_display_types.h    |  13 ++
>  .../gpu/drm/i915/display/intel_histogram.c    |   6 +
>  6 files changed, 214 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> index 03dc54c802d3..a0d64a20b01e 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -246,6 +246,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
>  
>  	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->uapi);
>  
> +	if (crtc_state->histogram.global_iet)
> +		drm_property_blob_get(crtc_state->histogram.global_iet);
>  	/* copy color blobs */
>  	if (crtc_state->hw.degamma_lut)
>  		drm_property_blob_get(crtc_state->hw.degamma_lut);
> @@ -278,6 +280,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
>  	crtc_state->dsb_color_vblank = NULL;
>  	crtc_state->dsb_commit = NULL;
>  	crtc_state->use_dsb = false;
> +	crtc_state->histogram.histogram_enable_changed = false;
>  
>  	return &crtc_state->uapi;
>  }
> @@ -314,6 +317,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
>  	drm_WARN_ON(crtc->dev, crtc_state->dsb_color_vblank);
>  	drm_WARN_ON(crtc->dev, crtc_state->dsb_commit);
>  
> +	if (crtc_state->histogram.global_iet)
> +		drm_property_blob_put(crtc_state->histogram.global_iet);
>  	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
>  	intel_crtc_free_hw_state(crtc_state);
>  	if (crtc_state->dp_tunnel_ref.tunnel)
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
> index a2c528d707f4..3be81a5a789b 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> @@ -11,6 +11,7 @@
>  #include <drm/drm_plane.h>
>  #include <drm/drm_vblank.h>
>  #include <drm/drm_vblank_work.h>
> +#include <drm/drm_atomic_uapi.h>
>  
>  #include "i915_vgpu.h"
>  #include "i9xx_plane.h"
> @@ -27,6 +28,7 @@
>  #include "intel_drrs.h"
>  #include "intel_dsi.h"
>  #include "intel_fifo_underrun.h"
> +#include "intel_histogram.h"
>  #include "intel_pipe_crc.h"
>  #include "intel_psr.h"
>  #include "intel_sprite.h"
> @@ -210,6 +212,7 @@ static struct intel_crtc *intel_crtc_alloc(void)
>  static void intel_crtc_free(struct intel_crtc *crtc)
>  {
>  	intel_crtc_destroy_state(&crtc->base, crtc->base.state);
> +	intel_histogram_finish(crtc);
>  	kfree(crtc);
>  }
>  
> @@ -229,6 +232,66 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
>  	return 0;
>  }
>  
> +static int intel_crtc_get_property(struct drm_crtc *crtc,
> +				   const struct drm_crtc_state *state,
> +				   struct drm_property *property,
> +				   uint64_t *val)
> +{
> +	struct drm_i915_private *i915 = to_i915(crtc->dev);

Please use intel_display, you don't need i915 for anything.

> +	const struct intel_crtc_state *intel_crtc_state =
> +		to_intel_crtc_state(state);
> +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +
> +	if (property == intel_crtc->histogram_en_property) {
> +		*val = intel_crtc_state->histogram.histogram_enable;
> +	} else if (property == intel_crtc->global_iet_property) {
> +		*val = (intel_crtc_state->histogram.global_iet) ?
> +			intel_crtc_state->histogram.global_iet->base.id : 0;
> +	} else if (property == intel_crtc->histogram_property) {
> +		*val = (intel_crtc_state->histogram.histogram) ?
> +			intel_crtc_state->histogram.histogram->base.id : 0;
> +	} else {
> +		drm_err(&i915->drm,
> +			"Unknown property [PROP:%d:%s]\n",
> +			property->base.id, property->name);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int intel_crtc_set_property(struct drm_crtc *crtc,
> +				   struct drm_crtc_state *state,
> +				   struct drm_property *property,
> +				   u64 val)
> +{
> +	struct drm_i915_private *i915 = to_i915(crtc->dev);

Ditto.

> +	struct intel_crtc_state *intel_crtc_state =
> +		to_intel_crtc_state(state);
> +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +	bool replaced = false;
> +
> +	if (property == intel_crtc->histogram_en_property) {
> +		intel_crtc_state->histogram.histogram_enable = val;
> +		return 0;
> +	}
> +
> +	if (property == intel_crtc->global_iet_property) {
> +		drm_property_replace_blob_from_id(crtc->dev,
> +						  &intel_crtc_state->histogram.global_iet,
> +						  val,
> +						  sizeof(uint32_t) * HISTOGRAM_IET_LENGTH,
> +						  -1, &replaced);
> +		if (replaced)
> +			intel_crtc_state->histogram.global_iet_changed = true;
> +		return 0;
> +	}
> +
> +	drm_dbg_atomic(&i915->drm, "Unknown property [PROP:%d:%s]\n",
> +		       property->base.id, property->name);
> +	return -EINVAL;
> +}
> +
>  #define INTEL_CRTC_FUNCS \
>  	.set_config = drm_atomic_helper_set_config, \
>  	.destroy = intel_crtc_destroy, \
> @@ -238,7 +301,9 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
>  	.set_crc_source = intel_crtc_set_crc_source, \
>  	.verify_crc_source = intel_crtc_verify_crc_source, \
>  	.get_crc_sources = intel_crtc_get_crc_sources, \
> -	.late_register = intel_crtc_late_register
> +	.late_register = intel_crtc_late_register, \
> +	.atomic_set_property = intel_crtc_set_property, \
> +	.atomic_get_property = intel_crtc_get_property
>  
>  static const struct drm_crtc_funcs bdw_crtc_funcs = {
>  	INTEL_CRTC_FUNCS,
> @@ -383,6 +448,10 @@ int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
>  	intel_color_crtc_init(crtc);
>  	intel_drrs_crtc_init(crtc);
>  	intel_crtc_crc_init(crtc);
> +	intel_histogram_init(crtc);
> +
> +	/* Initialize crtc properties */
> +	intel_crtc_add_property(crtc);
>  
>  	cpu_latency_qos_add_request(&crtc->vblank_pm_qos, PM_QOS_DEFAULT_VALUE);
>  
> @@ -737,3 +806,100 @@ void intel_pipe_update_end(struct intel_atomic_state *state,
>  out:
>  	intel_psr_unlock(new_crtc_state);
>  }
> +
> +static const struct drm_prop_enum_list histogram_enable_names[] = {
> +	{ INTEL_HISTOGRAM_DISABLE, "Disable" },
> +	{ INTEL_HISTOGRAM_ENABLE, "Enable" },
> +};
> +
> +/**
> + * intel_attach_histogram_en_property() - add property to enable/disable histogram
> + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram is to
> + *		be enabled/disabled
> + *
> + * "HISTOGRAM_EN" is the crtc propety to enable/disable global histogram

The old saying goes, if the code and comments disagree, both are wrong.

> + */
> +void intel_attach_histogram_en_property(struct intel_crtc *intel_crtc)
> +{
> +	struct drm_crtc *crtc = &intel_crtc->base;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_property *prop;
> +
> +	prop = intel_crtc->histogram_en_property;
> +	if (!prop) {
> +		prop = drm_property_create_enum(dev, 0,
> +						"Histogram_Enable",
> +						histogram_enable_names,
> +						ARRAY_SIZE(histogram_enable_names));
> +		if (!prop)
> +			return;
> +
> +		intel_crtc->histogram_en_property = prop;
> +	}
> +
> +	drm_object_attach_property(&crtc->base, prop, 0);
> +}
> +
> +/**
> + * intel_attach_global_iet_property() - add property to write Image Enhancement data
> + * @intel_crtc: pointer to the struct intel_crtc on which global histogram is enabled
> + *
> + * "Global IET" is the crtc property to write the Image Enhancement LUT binary data
> + */
> +void intel_attach_global_iet_property(struct intel_crtc *intel_crtc)
> +{
> +	struct drm_crtc *crtc = &intel_crtc->base;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_property *prop;
> +
> +	prop = intel_crtc->global_iet_property;
> +	if (!prop) {
> +		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | DRM_MODE_PROP_ATOMIC,
> +					   "Global IET", 0);
> +		if (!prop)
> +			return;
> +
> +		intel_crtc->global_iet_property = prop;
> +	}
> +
> +	drm_object_attach_property(&crtc->base, prop, 0);
> +}
> +
> +/**
> + * intel_attach_histogram_property() - crtc property to read the histogram.
> + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram
> + *		was enabled.
> + * "Global Histogram" is the crtc property to read the binary histogram data.
> + */
> +void intel_attach_histogram_property(struct intel_crtc *intel_crtc)
> +{
> +	struct drm_crtc *crtc = &intel_crtc->base;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_property *prop;
> +	struct drm_property_blob *blob;
> +
> +	prop = intel_crtc->histogram_property;
> +	if (!prop) {
> +		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
> +					   DRM_MODE_PROP_ATOMIC |
> +					   DRM_MODE_PROP_IMMUTABLE,
> +					   "Global Histogram", 0);
> +		if (!prop)
> +			return;
> +
> +		intel_crtc->histogram_property = prop;
> +	}
> +	blob = drm_property_create_blob(dev, sizeof(uint32_t) * HISTOGRAM_BIN_COUNT, NULL);
> +	intel_crtc->config->histogram.histogram = blob;
> +
> +	drm_object_attach_property(&crtc->base, prop, blob->base.id);
> +}
> +
> +int intel_crtc_add_property(struct intel_crtc *intel_crtc)
> +{
> +	intel_attach_histogram_en_property(intel_crtc);
> +	intel_attach_histogram_property(intel_crtc);
> +	intel_attach_global_iet_property(intel_crtc);
> +
> +	return 0;
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.h b/drivers/gpu/drm/i915/display/intel_crtc.h
> index de54ae1deedf..4e0a3c43d4f8 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.h
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.h
> @@ -7,6 +7,7 @@
>  #define _INTEL_CRTC_H_
>  
>  #include <linux/types.h>
> +#include <drm/drm_crtc.h>

Do not include anything in headers unless you absolutely have to.

>  
>  enum i9xx_plane_id;
>  enum pipe;
> @@ -59,4 +60,8 @@ void intel_wait_for_vblank_if_active(struct drm_i915_private *i915,
>  				     enum pipe pipe);
>  void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
>  
> +int intel_crtc_add_property(struct intel_crtc *intel_crtc);
> +void intel_attach_histogram_en_property(struct intel_crtc *intel_crtc);
> +void intel_attach_global_iet_property(struct intel_crtc *intel_crtc);
> +void intel_attach_histogram_property(struct intel_crtc *intel_crtc);

Blank line missing here.

>  #endif
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index e790a2de5b3d..0c3008a2d774 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -93,6 +93,7 @@
>  #include "intel_fifo_underrun.h"
>  #include "intel_frontbuffer.h"
>  #include "intel_hdmi.h"
> +#include "intel_histogram.h"
>  #include "intel_hotplug.h"
>  #include "intel_link_bw.h"
>  #include "intel_lvds.h"
> @@ -4607,6 +4608,10 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
>  	if (ret)
>  		return ret;
>  
> +	/* HISTOGRAM changed */
> +	if (crtc_state->histogram.histogram_enable_changed)
> +		return intel_histogram_atomic_check(crtc);
> +
>  	return 0;
>  }
>  
> @@ -6826,6 +6831,11 @@ int intel_atomic_check(struct drm_device *dev,
>  		if (new_crtc_state->uapi.scaling_filter !=
>  		    old_crtc_state->uapi.scaling_filter)
>  			new_crtc_state->uapi.mode_changed = true;
> +
> +		/* Histogram updates */
> +		if (old_crtc_state->histogram.histogram_enable !=
> +		    new_crtc_state->histogram.histogram_enable)
> +			new_crtc_state->histogram.histogram_enable_changed = true;
>  	}
>  
>  	intel_vrr_check_modeset(state);
> @@ -7892,6 +7902,14 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
>  		 */
>  		old_crtc_state->dsb_color_vblank = fetch_and_zero(&new_crtc_state->dsb_color_vblank);
>  		old_crtc_state->dsb_commit = fetch_and_zero(&new_crtc_state->dsb_commit);
> +
> +		/* Re-Visit: HISTOGRAM related stuff */

What? Why?

> +		if (new_crtc_state->histogram.histogram_enable_changed)
> +			intel_histogram_update(crtc,
> +					       new_crtc_state->histogram.histogram_enable);
> +		if (new_crtc_state->histogram.global_iet_changed)
> +			intel_histogram_set_iet_lut(crtc,
> +						    (u32 *)new_crtc_state->histogram.global_iet->data);
>  	}
>  
>  	/* Underruns don't always raise interrupts, so check manually */
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 351441efd10a..300e90998463 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1306,6 +1306,15 @@ struct intel_crtc_state {
>  
>  	/* LOBF flag */
>  	bool has_lobf;
> +
> +	/* Histogram data */
> +	struct {
> +		int histogram_enable;
> +		struct drm_property_blob *global_iet;
> +		struct drm_property_blob *histogram;
> +		bool global_iet_changed;
> +		bool histogram_enable_changed;
> +	} histogram;
>  };
>  
>  enum intel_pipe_crc_source {
> @@ -1415,6 +1424,10 @@ struct intel_crtc {
>  	struct pm_qos_request vblank_pm_qos;
>  
>  	struct intel_histogram *histogram;
> +	/* HISTOGRAM properties */
> +	struct drm_property *histogram_en_property;
> +	struct drm_property *global_iet_property;
> +	struct drm_property *histogram_property;
>  
>  #ifdef CONFIG_DEBUG_FS
>  	struct intel_pipe_crc pipe_crc;
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
> index 16f29923ef10..cba65f4260cd 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -82,6 +82,11 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
>  	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
>  		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
>  	if (intel_histogram_get_data(intel_crtc)) {
> +		drm_property_replace_global_blob(display->drm,
> +				&intel_crtc->config->histogram.histogram,
> +				sizeof(histogram->bin_data),
> +				histogram->bin_data, &intel_crtc->base.base,
> +				intel_crtc->histogram_property);
>  		/* Notify user for Histogram rediness */
>  		if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
>  				       KOBJ_CHANGE, histogram_event))
> @@ -203,6 +208,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc)
>  
>  	cancel_delayed_work(&histogram->work);
>  	histogram->enable = false;
> +	intel_crtc->config->histogram.histogram_enable = false;
>  }
>  
>  int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable)

-- 
Jani Nikula, Intel

^ permalink raw reply	[flat|nested] 28+ messages in thread

* Re: [PATCHv5 0/8] Display Global Histogram
  2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
                   ` (9 preceding siblings ...)
  2024-11-19 11:33 ` ✗ Fi.CI.SPARSE: " Patchwork
@ 2024-11-19 12:39 ` Daniel Stone
  2024-11-19 14:39   ` Murthy, Arun R
  10 siblings, 1 reply; 28+ messages in thread
From: Daniel Stone @ 2024-11-19 12:39 UTC (permalink / raw)
  To: Arun R Murthy; +Cc: intel-xe, intel-gfx, dri-devel

Hi Arun,

On Tue, 19 Nov 2024 at 10:55, Arun R Murthy <arun.r.murthy@intel.com> wrote:
> The corresponding mutter changes to enable/disable histogram, read the
> histogram data, communicate with the library and write the enhanced data
> back to the KMD is also pushed for review at https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3873

The Mutter MR you linked does not actually write anything back to KMS.

Cheers,
Daniel

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv5 0/8] Display Global Histogram
  2024-11-19 12:39 ` [PATCHv5 0/8] Display Global Histogram Daniel Stone
@ 2024-11-19 14:39   ` Murthy, Arun R
  2024-11-19 15:18     ` Daniel Stone
  0 siblings, 1 reply; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-19 14:39 UTC (permalink / raw)
  To: Daniel Stone
  Cc: intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org

> On Tue, 19 Nov 2024 at 10:55, Arun R Murthy <arun.r.murthy@intel.com>
> wrote:
> > The corresponding mutter changes to enable/disable histogram, read the
> > histogram data, communicate with the library and write the enhanced
> > data back to the KMD is also pushed for review at
> > https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3873
> 
> The Mutter MR you linked does not actually write anything back to KMS.
> 

Yes, writing the IET LUT data back to KMD using a crtc blob property is pending in mutter and is commented in the mutter MR.

Thanks and Regards,
Arun R Murthy
--------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

* Re: [PATCHv5 0/8] Display Global Histogram
  2024-11-19 14:39   ` Murthy, Arun R
@ 2024-11-19 15:18     ` Daniel Stone
  0 siblings, 0 replies; 28+ messages in thread
From: Daniel Stone @ 2024-11-19 15:18 UTC (permalink / raw)
  To: Murthy, Arun R
  Cc: intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org

Hi Arun,

On Tue, 19 Nov 2024 at 14:39, Murthy, Arun R <arun.r.murthy@intel.com> wrote:
> > On Tue, 19 Nov 2024 at 10:55, Arun R Murthy <arun.r.murthy@intel.com>
> > wrote:
> > > The corresponding mutter changes to enable/disable histogram, read the
> > > histogram data, communicate with the library and write the enhanced
> > > data back to the KMD is also pushed for review at
> > > https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3873
> >
> > The Mutter MR you linked does not actually write anything back to KMS.
>
> Yes, writing the IET LUT data back to KMD using a crtc blob property is pending in mutter and is commented in the mutter MR.

Sure, that's fine, but until the actual userspace exists, this cannot
be meaningfully reviewed.

Cheers,
Daniel

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram
  2024-11-19 10:45 ` [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram Arun R Murthy
@ 2024-11-20  7:17   ` Kandpal, Suraj
  0 siblings, 0 replies; 28+ messages in thread
From: Kandpal, Suraj @ 2024-11-20  7:17 UTC (permalink / raw)
  To: Murthy, Arun R, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
  Cc: Murthy, Arun R



> -----Original Message-----
> From: Intel-xe <intel-xe-bounces@lists.freedesktop.org> On Behalf Of Arun R
> Murthy
> Sent: Tuesday, November 19, 2024 4:15 PM
> To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram
> 
> Add the register/bit definitions for global histogram.
> 
> v2: Intended the register contents, removed unused regs (Jani)

Adding Bpsec references for register definitions would help 
Other than that LGTM,
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>

> 
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  .../drm/i915/display/intel_histogram_regs.h   | 48 +++++++++++++++++++
>  1 file changed, 48 insertions(+)
>  create mode 100644 drivers/gpu/drm/i915/display/intel_histogram_regs.h
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> new file mode 100644
> index 000000000000..1252b4f339a6
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> @@ -0,0 +1,48 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2024 Intel Corporation
> + */
> +
> +#ifndef __INTEL_HISTOGRAM_REGS_H__
> +#define __INTEL_HISTOGRAM_REGS_H__
> +
> +#include "intel_display_reg_defs.h"
> +
> +/* GLOBAL_HIST related registers */
> +#define _DPST_CTL_A					0x490C0
> +#define _DPST_CTL_B					0x491C0
> +#define DPST_CTL(pipe)
> 	_MMIO_PIPE(pipe, _DPST_CTL_A, _DPST_CTL_B)
> +#define  DPST_CTL_IE_HIST_EN				REG_BIT(31)
> +#define  DPST_CTL_RESTORE				REG_BIT(28)
> +#define  DPST_CTL_IE_MODI_TABLE_EN			REG_BIT(27)
> +#define  DPST_CTL_HIST_MODE				REG_BIT(24)
> +#define  DPST_CTL_ENHANCEMENT_MODE_MASK
> 	REG_GENMASK(14, 13)
> +#define  DPST_CTL_EN_MULTIPLICATIVE
> 	REG_FIELD_PREP(DPST_CTL_ENHANCEMENT_MODE_MASK, 2)
> +#define  DPST_CTL_IE_TABLE_VALUE_FORMAT			REG_BIT(15)
> +#define  DPST_CTL_BIN_REG_FUNC_SEL			REG_BIT(11)
> +#define  DPST_CTL_BIN_REG_FUNC_TC
> 	REG_FIELD_PREP(DPST_CTL_BIN_REG_FUNC_SEL, 0)
> +#define  DPST_CTL_BIN_REG_FUNC_IE
> 	REG_FIELD_PREP(DPST_CTL_BIN_REG_FUNC_SEL, 1)
> +#define  DPST_CTL_BIN_REG_MASK
> 	REG_GENMASK(6, 0)
> +#define  DPST_CTL_BIN_REG_CLEAR
> 	REG_FIELD_PREP(DPST_CTL_BIN_REG_MASK, 0)
> +#define  DPST_CTL_IE_TABLE_VALUE_FORMAT_2INT_8FRAC
> 	REG_FIELD_PREP(DPST_CTL_IE_TABLE_VALUE_FORMAT, 1)
> +#define  DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC
> 	REG_FIELD_PREP(DPST_CTL_IE_TABLE_VALUE_FORMAT, 0)
> +#define  DPST_CTL_HIST_MODE_YUV
> 	REG_FIELD_PREP(DPST_CTL_HIST_MODE, 0)
> +#define  DPST_CTL_HIST_MODE_HSV
> 	REG_FIELD_PREP(DPST_CTL_HIST_MODE, 1)
> +
> +#define _DPST_GUARD_A					0x490C8
> +#define _DPST_GUARD_B					0x491C8
> +#define DPST_GUARD(pipe)				_MMIO_PIPE(pipe,
> _DPST_GUARD_A, _DPST_GUARD_B)
> +#define  DPST_GUARD_HIST_INT_EN				REG_BIT(31)
> +#define  DPST_GUARD_HIST_EVENT_STATUS			REG_BIT(30)
> +#define  DPST_GUARD_INTERRUPT_DELAY_MASK
> 	REG_GENMASK(29, 22)
> +#define  DPST_GUARD_INTERRUPT_DELAY(val)
> 	REG_FIELD_PREP(DPST_GUARD_INTERRUPT_DELAY_MASK, val)
> +#define  DPST_GUARD_THRESHOLD_GB_MASK
> 	REG_GENMASK(21, 0)
> +#define  DPST_GUARD_THRESHOLD_GB(val)
> 	REG_FIELD_PREP(DPST_GUARD_THRESHOLD_GB_MASK, val)
> +
> +#define _DPST_BIN_A					0x490C4
> +#define _DPST_BIN_B					0x491C4
> +#define DPST_BIN(pipe)
> 	_MMIO_PIPE(pipe, _DPST_BIN_A, _DPST_BIN_B)
> +#define  DPST_BIN_DATA_MASK
> 	REG_GENMASK(23, 0)
> +#define  DPST_BIN_BUSY					REG_BIT(31)
> +
> +#endif /* __INTEL_HISTOGRAM_REGS_H__ */
> --
> 2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv4 2/8] drm/i915/histogram: Add support for histogram
  2024-11-19 10:45 ` [PATCHv4 2/8] drm/i915/histogram: Add support " Arun R Murthy
@ 2024-11-20  8:13   ` Kandpal, Suraj
  2024-11-21  7:14     ` Murthy, Arun R
  0 siblings, 1 reply; 28+ messages in thread
From: Kandpal, Suraj @ 2024-11-20  8:13 UTC (permalink / raw)
  To: Murthy, Arun R, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
  Cc: Murthy, Arun R



> -----Original Message-----
> From: Intel-xe <intel-xe-bounces@lists.freedesktop.org> On Behalf Of Arun R
> Murthy
> Sent: Tuesday, November 19, 2024 4:15 PM
> To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: [PATCHv4 2/8] drm/i915/histogram: Add support for histogram
> 
> Statistics is generated from the image frame that is coming to display and an
> event is sent to user after reading this histogram data.
> This statistics/histogram is then shared with the user upon getting a request
> from user. User can then use this histogram and generate an enhancement
> factor. This enhancement factor can be multiplied/added with the incoming
> pixel data frame.
> 
> v2: forward declaration in header file along with error handling (Jani)
> v3: Replaced i915 with intel_display (Suraj)
> v4: Removed dithering enable/disable (Vandita)
>     New patch for histogram register definitions (Suraj)
> 

Mostly looks okay to me some minor comments and questions below

> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  drivers/gpu/drm/i915/Makefile                 |   1 +
>  .../drm/i915/display/intel_display_types.h    |   2 +
>  .../gpu/drm/i915/display/intel_histogram.c    | 195 ++++++++++++++++++
>  .../gpu/drm/i915/display/intel_histogram.h    |  35 ++++
>  4 files changed, 233 insertions(+)
>  create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.c
>  create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.h
> 
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index e465828d748f..97141b4def3b 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -267,6 +267,7 @@ i915-y += \
>  	display/intel_hdcp.o \
>  	display/intel_hdcp_gsc.o \
>  	display/intel_hdcp_gsc_message.o \
> +	display/intel_histogram.o \
>  	display/intel_hotplug.o \
>  	display/intel_hotplug_irq.o \
>  	display/intel_hti.o \
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 339e4b0f7698..351441efd10a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1414,6 +1414,8 @@ struct intel_crtc {
>  	/* for loading single buffered registers during vblank */
>  	struct pm_qos_request vblank_pm_qos;
> 
> +	struct intel_histogram *histogram;
> +
>  #ifdef CONFIG_DEBUG_FS
>  	struct intel_pipe_crc pipe_crc;
>  #endif
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> b/drivers/gpu/drm/i915/display/intel_histogram.c
> new file mode 100644
> index 000000000000..e751977fc6f7
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -0,0 +1,195 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2024 Intel Corporation
> + */
> +
> +#include <drm/drm_device.h>
> +#include <drm/drm_file.h>
> +#include <drm/drm_vblank.h>
> +
> +#include "i915_reg.h"
> +#include "i915_drv.h"
> +#include "intel_display.h"
> +#include "intel_histogram_regs.h"
> +#include "intel_histogram.h"
> +#include "intel_display_types.h"
> +#include "intel_de.h"

Rearrange the above definitions in alphabetical order so intel_de goes above intel display and
Display types comes under  intel_display

> +
> +#define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300    // 3.0% of
> the pipe's current pixel count.
> +#define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000   // Precision
> factor for threshold guardband.

Shouldn’t we be using /* xxxxx */ to make comments

> +#define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04
> +
> +struct intel_histogram {
> +	struct intel_crtc *crtc;
> +	struct delayed_work work;
> +	bool enable;
> +	bool can_enable;
> +	u32 bin_data[HISTOGRAM_BIN_COUNT];
> +};
> +
> +int intel_histogram_atomic_check(struct intel_crtc *intel_crtc) {
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +
> +	/* TODO: Restrictions for enabling histogram */

Should we at least add the restriction for the minimum  display version required to run DPST?

> +	histogram->can_enable = true;
> +
> +	return 0;
> +}
> +
> +static int intel_histogram_enable(struct intel_crtc *intel_crtc) {
> +	struct intel_display *display = to_intel_display(intel_crtc);
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +	int pipe = intel_crtc->pipe;
> +	u64 res;
> +	u32 gbandthreshold;
> +
> +	if (!histogram)
> +		return -EINVAL;
> +
> +	if (!histogram->can_enable)
> +		return -EINVAL;
> +
> +	if (histogram->enable)
> +		return 0;
> +
> +	 /* enable histogram, clear DPST_BIN reg and select TC function */

I think you mean "Clear DPST_CTL bin reg func select to TC"
Because that’s what I see on Bspec and also I don’t see you clearing DPST_BIN register
	
> +	intel_de_rmw(display, DPST_CTL(pipe),
> +		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
> +		     DPST_CTL_HIST_MODE |
> DPST_CTL_IE_TABLE_VALUE_FORMAT,
> +		     DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
> +		     DPST_CTL_HIST_MODE_HSV |
> +		     DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
> +
> +	/* Re-Visit: check if wait for one vblank is required */
> +	drm_crtc_wait_one_vblank(&intel_crtc->base);

Confused here so histogram will not be enabled for at least 2 vblanks and 3 vblanks for display 12-14 after writing enable
When enabled outside the active region so why just the single vblank wait ?

> +
> +	/*
> +	 * TODO: one time programming: Program GuardBand Threshold.
> +	 * To be moved to modeset path
> +	 */

The two : back to back seem dirty after the todo state in a single sentence what needs to be done

> +	res = (intel_crtc->config->hw.adjusted_mode.vtotal *
> +	       intel_crtc->config->hw.adjusted_mode.htotal);
> +
> +	gbandthreshold = (res *
> 	HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT) /
> +			  HISTOGRAM_GUARDBAND_PRECISION_FACTOR;

According to bspec this value i.e gbandthreshold "This value is shifted left 2 bits (multiplied by 4) for use with the 24 bit bin values."
I don’t see that happening here is that on purpose?
Also I don’t see any spec stating how you calculate this threshold can you point me to where this is written.

> +
> +	/* Enable histogram interrupt mode */
> +	intel_de_rmw(display, DPST_GUARD(pipe),
> +		     DPST_GUARD_THRESHOLD_GB_MASK |
> +		     DPST_GUARD_INTERRUPT_DELAY_MASK |
> DPST_GUARD_HIST_INT_EN,
> +		     DPST_GUARD_THRESHOLD_GB(gbandthreshold) |
> +
> DPST_GUARD_INTERRUPT_DELAY(HISTOGRAM_DEFAULT_GUARDBAND_DELA
> Y) |

Where do we get the HISTOGRAM_DEFAULT_GUARDBAND_DELAY from ?

> +		     DPST_GUARD_HIST_INT_EN);
> +
> +	/* Clear pending interrupts has to be done on separate write */
> +	intel_de_rmw(display, DPST_GUARD(pipe),
> +		     DPST_GUARD_HIST_EVENT_STATUS, 1);
> +
> +	histogram->enable = true;
> +
> +	return 0;
> +}
> +
> +static void intel_histogram_disable(struct intel_crtc *intel_crtc) {
> +	struct intel_display *display = to_intel_display(intel_crtc);
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +	int pipe = intel_crtc->pipe;
> +
> +	if (!histogram)
> +		return;
> +
> +	/* If already disabled return */
> +	if (histogram->enable)
> +		return;
> +
> +	/* Clear pending interrupts and disable interrupts */
> +	intel_de_rmw(display, DPST_GUARD(pipe),
> +		     DPST_GUARD_HIST_INT_EN |
> DPST_GUARD_HIST_EVENT_STATUS, 0);
> +
> +	/* disable DPST_CTL Histogram mode */
> +	intel_de_rmw(display, DPST_CTL(pipe),
> +		     DPST_CTL_IE_HIST_EN, 0);
> +
> +	histogram->enable = false;
> +}
> +
> +int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable)
> +{
> +	if (enable)
> +		return intel_histogram_enable(intel_crtc);
> +
> +	intel_histogram_disable(intel_crtc);
> +	return 0;
> +}
> +
> +int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32
> +*data) {
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +	struct intel_display *display = to_intel_display(intel_crtc);
> +	int pipe = intel_crtc->pipe;
> +	int i = 0;
> +
> +	if (!histogram)
> +		return -EINVAL;
> +
> +	if (!histogram->enable) {
> +		drm_err(display->drm, "histogram not enabled");
> +		return -EINVAL;
> +	}
> +
> +	if (!data) {
> +		drm_err(display->drm, "enhancement LUT data is NULL");
> +		return -EINVAL;
> +	}
> +
> +	/*
> +	 * Set DPST_CTL Bin Reg function select to IE
> +	 * Set DPST_CTL Bin Register Index to 0
> +	 */
> +	intel_de_rmw(display, DPST_CTL(pipe),
> +		     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK,
> +		     DPST_CTL_BIN_REG_FUNC_IE |
> DPST_CTL_BIN_REG_CLEAR);
> +
> +	for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> +		intel_de_rmw(display, DPST_BIN(pipe),
> +			     DPST_BIN_DATA_MASK, data[i]);
> +		drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i,
> data[i]);
> +	}
> +
> +	intel_de_rmw(display, DPST_CTL(pipe),
> +		     DPST_CTL_ENHANCEMENT_MODE_MASK |
> DPST_CTL_IE_MODI_TABLE_EN,
> +		     DPST_CTL_EN_MULTIPLICATIVE |
> DPST_CTL_IE_MODI_TABLE_EN);

According to Bspec we follow the below steps
" 
1)Set DPST_CTL Bin Register Function Select to IE
2)Wait for vertical blank for switch to IE mode, can skip if step 1 was done more than 1 vblank previously
3)Set DPST_CTL Bin Register Index to 0
4)Write enhancement factor to DPST_BIN Data
4)Go to step 4 until all 33 entries are written
"
The sequence in code seems reversed.
Also I don’t see the vblank wait that need to be done after switching to IE mode.


> +
> +	/* Once IE is applied, change DPST CTL to TC */
> +	intel_de_rmw(display, DPST_CTL(pipe),
> +		     DPST_CTL_BIN_REG_FUNC_SEL,
> DPST_CTL_BIN_REG_FUNC_TC);
> +
> +	return 0;
> +}
> +
> +void intel_histogram_finish(struct intel_crtc *intel_crtc) {
> +	struct intel_histogram *histogram = intel_crtc->histogram;
> +
> +	kfree(histogram);
> +}
> +
> +int intel_histogram_init(struct intel_crtc *intel_crtc) {
> +	struct intel_histogram *histogram;
> +
> +	/* Allocate histogram internal struct */
> +	histogram = kzalloc(sizeof(*histogram), GFP_KERNEL);
> +	if (!histogram) {
> +		return -ENOMEM;
> +	}

No need for extra brackets

Regards,
Suraj Kandpal

> +
> +	intel_crtc->histogram = histogram;
> +	histogram->crtc = intel_crtc;
> +	histogram->can_enable = false;
> +
> +	return 0;
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.h
> b/drivers/gpu/drm/i915/display/intel_histogram.h
> new file mode 100644
> index 000000000000..9d66724f9c53
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.h
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2024 Intel Corporation
> + */
> +
> +#ifndef __INTEL_HISTOGRAM_H__
> +#define __INTEL_HISTOGRAM_H__
> +
> +#include <linux/types.h>
> +
> +struct intel_crtc;
> +
> +#define HISTOGRAM_BIN_COUNT                    32
> +#define HISTOGRAM_IET_LENGTH                   33
> +
> +enum intel_global_hist_status {
> +	INTEL_HISTOGRAM_ENABLE,
> +	INTEL_HISTOGRAM_DISABLE,
> +};
> +
> +enum intel_global_histogram {
> +	INTEL_HISTOGRAM,
> +};
> +
> +enum intel_global_hist_lut {
> +	INTEL_HISTOGRAM_PIXEL_FACTOR,
> +};
> +
> +int intel_histogram_atomic_check(struct intel_crtc *intel_crtc); int
> +intel_histogram_update(struct intel_crtc *intel_crtc, bool enable); int
> +intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32 *data);
> +int intel_histogram_init(struct intel_crtc *intel_crtc); void
> +intel_histogram_finish(struct intel_crtc *intel_crtc);
> +
> +#endif /* __INTEL_HISTOGRAM_H__ */
> --
> 2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram
  2024-11-19 10:45 ` [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram Arun R Murthy
  2024-11-19 11:41   ` Jani Nikula
@ 2024-11-20  8:33   ` Kandpal, Suraj
  2024-11-21  7:19     ` Murthy, Arun R
  1 sibling, 1 reply; 28+ messages in thread
From: Kandpal, Suraj @ 2024-11-20  8:33 UTC (permalink / raw)
  To: Murthy, Arun R, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
  Cc: Murthy, Arun R



> -----Original Message-----
> From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of
> Arun R Murthy
> Sent: Tuesday, November 19, 2024 4:15 PM
> To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global
> histogram
> 
> CRTC properties have been added for enable/disable histogram, reading the
> histogram data and writing the IET data.
> "HISTOGRAM_EN" is the crtc property to enable/disable the global histogram
> and takes a value 0/1 accordingly.
> "Histogram" is a crtc property to read the binary histogram data.
> "Global IET" is a crtc property to write the IET binary LUT data.
> 
> v2: Read the histogram blob data before sending uevent (Jani)
> v3: use drm_property_replace_blob_from_id (Vandita)
>     Add substruct for histogram in intel_crtc_state (Jani)
> v4:  Rebased after addressing comments on patch 1
> v5: histogram check with old/new crtc_state (Suraj)
> 
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_atomic.c   |   5 +
>  drivers/gpu/drm/i915/display/intel_crtc.c     | 168 +++++++++++++++++-
>  drivers/gpu/drm/i915/display/intel_crtc.h     |   5 +
>  drivers/gpu/drm/i915/display/intel_display.c  |  18 ++
>  .../drm/i915/display/intel_display_types.h    |  13 ++
>  .../gpu/drm/i915/display/intel_histogram.c    |   6 +
>  6 files changed, 214 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
> b/drivers/gpu/drm/i915/display/intel_atomic.c
> index 03dc54c802d3..a0d64a20b01e 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -246,6 +246,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
> 
>  	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->uapi);
> 
> +	if (crtc_state->histogram.global_iet)
> +		drm_property_blob_get(crtc_state->histogram.global_iet);
>  	/* copy color blobs */
>  	if (crtc_state->hw.degamma_lut)
>  		drm_property_blob_get(crtc_state->hw.degamma_lut);
> @@ -278,6 +280,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
>  	crtc_state->dsb_color_vblank = NULL;
>  	crtc_state->dsb_commit = NULL;
>  	crtc_state->use_dsb = false;
> +	crtc_state->histogram.histogram_enable_changed = false;
> 
>  	return &crtc_state->uapi;
>  }
> @@ -314,6 +317,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
>  	drm_WARN_ON(crtc->dev, crtc_state->dsb_color_vblank);
>  	drm_WARN_ON(crtc->dev, crtc_state->dsb_commit);
> 
> +	if (crtc_state->histogram.global_iet)
> +		drm_property_blob_put(crtc_state->histogram.global_iet);
>  	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
>  	intel_crtc_free_hw_state(crtc_state);
>  	if (crtc_state->dp_tunnel_ref.tunnel)
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
> b/drivers/gpu/drm/i915/display/intel_crtc.c
> index a2c528d707f4..3be81a5a789b 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> @@ -11,6 +11,7 @@
>  #include <drm/drm_plane.h>
>  #include <drm/drm_vblank.h>
>  #include <drm/drm_vblank_work.h>
> +#include <drm/drm_atomic_uapi.h>
> 
>  #include "i915_vgpu.h"
>  #include "i9xx_plane.h"
> @@ -27,6 +28,7 @@
>  #include "intel_drrs.h"
>  #include "intel_dsi.h"
>  #include "intel_fifo_underrun.h"
> +#include "intel_histogram.h"
>  #include "intel_pipe_crc.h"
>  #include "intel_psr.h"
>  #include "intel_sprite.h"
> @@ -210,6 +212,7 @@ static struct intel_crtc *intel_crtc_alloc(void)  static
> void intel_crtc_free(struct intel_crtc *crtc)  {
>  	intel_crtc_destroy_state(&crtc->base, crtc->base.state);
> +	intel_histogram_finish(crtc);
>  	kfree(crtc);
>  }
> 
> @@ -229,6 +232,66 @@ static int intel_crtc_late_register(struct drm_crtc
> *crtc)
>  	return 0;
>  }
> 
> +static int intel_crtc_get_property(struct drm_crtc *crtc,
> +				   const struct drm_crtc_state *state,
> +				   struct drm_property *property,
> +				   uint64_t *val)
> +{
> +	struct drm_i915_private *i915 = to_i915(crtc->dev);
> +	const struct intel_crtc_state *intel_crtc_state =
> +		to_intel_crtc_state(state);
> +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +
> +	if (property == intel_crtc->histogram_en_property) {
> +		*val = intel_crtc_state->histogram.histogram_enable;
> +	} else if (property == intel_crtc->global_iet_property) {
> +		*val = (intel_crtc_state->histogram.global_iet) ?
> +			intel_crtc_state->histogram.global_iet->base.id : 0;
> +	} else if (property == intel_crtc->histogram_property) {
> +		*val = (intel_crtc_state->histogram.histogram) ?
> +			intel_crtc_state->histogram.histogram->base.id : 0;
> +	} else {
> +		drm_err(&i915->drm,
> +			"Unknown property [PROP:%d:%s]\n",
> +			property->base.id, property->name);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int intel_crtc_set_property(struct drm_crtc *crtc,
> +				   struct drm_crtc_state *state,
> +				   struct drm_property *property,
> +				   u64 val)
> +{
> +	struct drm_i915_private *i915 = to_i915(crtc->dev);
> +	struct intel_crtc_state *intel_crtc_state =
> +		to_intel_crtc_state(state);
> +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +	bool replaced = false;
> +
> +	if (property == intel_crtc->histogram_en_property) {
> +		intel_crtc_state->histogram.histogram_enable = val;
> +		return 0;
> +	}
> +
> +	if (property == intel_crtc->global_iet_property) {
> +		drm_property_replace_blob_from_id(crtc->dev,
> +						  &intel_crtc_state-
> >histogram.global_iet,
> +						  val,
> +						  sizeof(uint32_t) *
> HISTOGRAM_IET_LENGTH,
> +						  -1, &replaced);
> +		if (replaced)
> +			intel_crtc_state->histogram.global_iet_changed =
> true;
> +		return 0;
> +	}
> +
> +	drm_dbg_atomic(&i915->drm, "Unknown property [PROP:%d:%s]\n",
> +		       property->base.id, property->name);
> +	return -EINVAL;
> +}
> +
>  #define INTEL_CRTC_FUNCS \
>  	.set_config = drm_atomic_helper_set_config, \
>  	.destroy = intel_crtc_destroy, \
> @@ -238,7 +301,9 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
>  	.set_crc_source = intel_crtc_set_crc_source, \
>  	.verify_crc_source = intel_crtc_verify_crc_source, \
>  	.get_crc_sources = intel_crtc_get_crc_sources, \
> -	.late_register = intel_crtc_late_register
> +	.late_register = intel_crtc_late_register, \
> +	.atomic_set_property = intel_crtc_set_property, \
> +	.atomic_get_property = intel_crtc_get_property
> 
>  static const struct drm_crtc_funcs bdw_crtc_funcs = {
>  	INTEL_CRTC_FUNCS,
> @@ -383,6 +448,10 @@ int intel_crtc_init(struct drm_i915_private *dev_priv,
> enum pipe pipe)
>  	intel_color_crtc_init(crtc);
>  	intel_drrs_crtc_init(crtc);
>  	intel_crtc_crc_init(crtc);
> +	intel_histogram_init(crtc);
> +
> +	/* Initialize crtc properties */
> +	intel_crtc_add_property(crtc);
> 
>  	cpu_latency_qos_add_request(&crtc->vblank_pm_qos,
> PM_QOS_DEFAULT_VALUE);
> 
> @@ -737,3 +806,100 @@ void intel_pipe_update_end(struct
> intel_atomic_state *state,
>  out:
>  	intel_psr_unlock(new_crtc_state);
>  }
> +
> +static const struct drm_prop_enum_list histogram_enable_names[] = {
> +	{ INTEL_HISTOGRAM_DISABLE, "Disable" },
> +	{ INTEL_HISTOGRAM_ENABLE, "Enable" },
> +};
> +
> +/**
> + * intel_attach_histogram_en_property() - add property to
> +enable/disable histogram
> + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram
> is to
> + *		be enabled/disabled
> + *
> + * "HISTOGRAM_EN" is the crtc propety to enable/disable global
> +histogram  */ void intel_attach_histogram_en_property(struct intel_crtc
> +*intel_crtc) {
> +	struct drm_crtc *crtc = &intel_crtc->base;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_property *prop;
> +
> +	prop = intel_crtc->histogram_en_property;
> +	if (!prop) {
> +		prop = drm_property_create_enum(dev, 0,
> +						"Histogram_Enable",
> +						histogram_enable_names,
> +
> 	ARRAY_SIZE(histogram_enable_names));
> +		if (!prop)
> +			return;
> +
> +		intel_crtc->histogram_en_property = prop;
> +	}
> +
> +	drm_object_attach_property(&crtc->base, prop, 0); }
> +
> +/**
> + * intel_attach_global_iet_property() - add property to write Image
> +Enhancement data
> + * @intel_crtc: pointer to the struct intel_crtc on which global
> +histogram is enabled
> + *
> + * "Global IET" is the crtc property to write the Image Enhancement LUT
> +binary data  */ void intel_attach_global_iet_property(struct intel_crtc
> +*intel_crtc) {
> +	struct drm_crtc *crtc = &intel_crtc->base;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_property *prop;
> +
> +	prop = intel_crtc->global_iet_property;
> +	if (!prop) {
> +		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
> DRM_MODE_PROP_ATOMIC,
> +					   "Global IET", 0);
> +		if (!prop)
> +			return;
> +
> +		intel_crtc->global_iet_property = prop;
> +	}
> +
> +	drm_object_attach_property(&crtc->base, prop, 0); }
> +
> +/**
> + * intel_attach_histogram_property() - crtc property to read the histogram.
> + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram
> + *		was enabled.
> + * "Global Histogram" is the crtc property to read the binary histogram data.
> + */
> +void intel_attach_histogram_property(struct intel_crtc *intel_crtc) {
> +	struct drm_crtc *crtc = &intel_crtc->base;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_property *prop;
> +	struct drm_property_blob *blob;
> +
> +	prop = intel_crtc->histogram_property;
> +	if (!prop) {
> +		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
> +					   DRM_MODE_PROP_ATOMIC |
> +					   DRM_MODE_PROP_IMMUTABLE,
> +					   "Global Histogram", 0);
> +		if (!prop)
> +			return;
> +
> +		intel_crtc->histogram_property = prop;
> +	}
> +	blob = drm_property_create_blob(dev, sizeof(uint32_t) *
> HISTOGRAM_BIN_COUNT, NULL);
> +	intel_crtc->config->histogram.histogram = blob;
> +
> +	drm_object_attach_property(&crtc->base, prop, blob->base.id); }
> +
> +int intel_crtc_add_property(struct intel_crtc *intel_crtc) {
> +	intel_attach_histogram_en_property(intel_crtc);
> +	intel_attach_histogram_property(intel_crtc);
> +	intel_attach_global_iet_property(intel_crtc);
> +
> +	return 0;
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.h
> b/drivers/gpu/drm/i915/display/intel_crtc.h
> index de54ae1deedf..4e0a3c43d4f8 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.h
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.h
> @@ -7,6 +7,7 @@
>  #define _INTEL_CRTC_H_
> 
>  #include <linux/types.h>
> +#include <drm/drm_crtc.h>
> 
>  enum i9xx_plane_id;
>  enum pipe;
> @@ -59,4 +60,8 @@ void intel_wait_for_vblank_if_active(struct
> drm_i915_private *i915,
>  				     enum pipe pipe);
>  void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
> 
> +int intel_crtc_add_property(struct intel_crtc *intel_crtc); void
> +intel_attach_histogram_en_property(struct intel_crtc *intel_crtc); void
> +intel_attach_global_iet_property(struct intel_crtc *intel_crtc); void
> +intel_attach_histogram_property(struct intel_crtc *intel_crtc);
>  #endif
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index e790a2de5b3d..0c3008a2d774 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -93,6 +93,7 @@
>  #include "intel_fifo_underrun.h"
>  #include "intel_frontbuffer.h"
>  #include "intel_hdmi.h"
> +#include "intel_histogram.h"
>  #include "intel_hotplug.h"
>  #include "intel_link_bw.h"
>  #include "intel_lvds.h"
> @@ -4607,6 +4608,10 @@ static int intel_crtc_atomic_check(struct
> intel_atomic_state *state,
>  	if (ret)
>  		return ret;
> 
> +	/* HISTOGRAM changed */

No need for the above comment 

Regards,
Suraj Kandpal
> +	if (crtc_state->histogram.histogram_enable_changed)
> +		return intel_histogram_atomic_check(crtc);
> +
>  	return 0;
>  }
> 
> @@ -6826,6 +6831,11 @@ int intel_atomic_check(struct drm_device *dev,
>  		if (new_crtc_state->uapi.scaling_filter !=
>  		    old_crtc_state->uapi.scaling_filter)
>  			new_crtc_state->uapi.mode_changed = true;
> +
> +		/* Histogram updates */
> +		if (old_crtc_state->histogram.histogram_enable !=
> +		    new_crtc_state->histogram.histogram_enable)
> +			new_crtc_state-
> >histogram.histogram_enable_changed = true;
>  	}
> 
>  	intel_vrr_check_modeset(state);
> @@ -7892,6 +7902,14 @@ static void intel_atomic_commit_tail(struct
> intel_atomic_state *state)
>  		 */
>  		old_crtc_state->dsb_color_vblank =
> fetch_and_zero(&new_crtc_state->dsb_color_vblank);
>  		old_crtc_state->dsb_commit =
> fetch_and_zero(&new_crtc_state->dsb_commit);
> +
> +		/* Re-Visit: HISTOGRAM related stuff */
> +		if (new_crtc_state->histogram.histogram_enable_changed)
> +			intel_histogram_update(crtc,
> +					       new_crtc_state-
> >histogram.histogram_enable);
> +		if (new_crtc_state->histogram.global_iet_changed)
> +			intel_histogram_set_iet_lut(crtc,
> +						    (u32 *)new_crtc_state-
> >histogram.global_iet->data);
>  	}
> 
>  	/* Underruns don't always raise interrupts, so check manually */ diff -
> -git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 351441efd10a..300e90998463 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1306,6 +1306,15 @@ struct intel_crtc_state {
> 
>  	/* LOBF flag */
>  	bool has_lobf;
> +
> +	/* Histogram data */
> +	struct {
> +		int histogram_enable;
> +		struct drm_property_blob *global_iet;
> +		struct drm_property_blob *histogram;
> +		bool global_iet_changed;
> +		bool histogram_enable_changed;
> +	} histogram;
>  };
> 
>  enum intel_pipe_crc_source {
> @@ -1415,6 +1424,10 @@ struct intel_crtc {
>  	struct pm_qos_request vblank_pm_qos;
> 
>  	struct intel_histogram *histogram;
> +	/* HISTOGRAM properties */
> +	struct drm_property *histogram_en_property;
> +	struct drm_property *global_iet_property;
> +	struct drm_property *histogram_property;
> 
>  #ifdef CONFIG_DEBUG_FS
>  	struct intel_pipe_crc pipe_crc;
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> b/drivers/gpu/drm/i915/display/intel_histogram.c
> index 16f29923ef10..cba65f4260cd 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -82,6 +82,11 @@ static void intel_histogram_handle_int_work(struct
> work_struct *work)
>  	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
>  		     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK, 0);
>  	if (intel_histogram_get_data(intel_crtc)) {
> +		drm_property_replace_global_blob(display->drm,
> +				&intel_crtc->config->histogram.histogram,
> +				sizeof(histogram->bin_data),
> +				histogram->bin_data, &intel_crtc->base.base,
> +				intel_crtc->histogram_property);
>  		/* Notify user for Histogram rediness */
>  		if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
>  				       KOBJ_CHANGE, histogram_event)) @@ -
> 203,6 +208,7 @@ static void intel_histogram_disable(struct intel_crtc
> *intel_crtc)
> 
>  	cancel_delayed_work(&histogram->work);
>  	histogram->enable = false;
> +	intel_crtc->config->histogram.histogram_enable = false;
>  }
> 
>  int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable)
> --
> 2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset
  2024-11-19 10:45 ` [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset Arun R Murthy
@ 2024-11-20  9:09   ` Kandpal, Suraj
  2024-11-21 12:04     ` Murthy, Arun R
  0 siblings, 1 reply; 28+ messages in thread
From: Kandpal, Suraj @ 2024-11-20  9:09 UTC (permalink / raw)
  To: Murthy, Arun R, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
  Cc: Murthy, Arun R



> -----Original Message-----
> From: Intel-xe <intel-xe-bounces@lists.freedesktop.org> On Behalf Of Arun R
> Murthy
> Sent: Tuesday, November 19, 2024 4:15 PM
> To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt
> reset
> 
> The delay counter for histogram does not reset and as a result the histogram
> bin never gets updated. Workaround would be to use save and restore
> histogram register.
> Wa: 14014889975

This should be above the Signed-off-by

> 
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_histogram.c  | 17 +++++++++++++++++
> .../gpu/drm/i915/display/intel_histogram_regs.h |  1 +
>  2 files changed, 18 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> b/drivers/gpu/drm/i915/display/intel_histogram.c
> index cba65f4260cd..fdcc64677e96 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -74,6 +74,11 @@ static void intel_histogram_handle_int_work(struct
> work_struct *work)
>  	struct intel_display *display = to_intel_display(intel_crtc);
>  	char *histogram_event[] = {"HISTOGRAM=1", NULL};
> 
> +	/* Wa: 14014889975 */
> +	if (IS_DISPLAY_VER(display, 12, 13))

We have shifted to using is_display_verx100 so you can use that instead
Also there is no display ver 13 just 12 and then 14 so maybe this should be just display_ver == 12


> +		intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> +			     DPST_CTL_RESTORE, 0);
> +
>  	/*
>  	 * TODO: PSR to be exited while reading the Histogram data
>  	 * Set DPST_CTL Bin Reg function select to TC @@ -94,6 +99,12 @@
> static void intel_histogram_handle_int_work(struct work_struct *work)
>  				"sending HISTOGRAM event failed\n");
>  	}
> 
> +	/* Wa: 14014889975 */
> +	if (IS_DISPLAY_VER(display, 12, 13))
> +		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt
> Delay Counter(bit 23:16) */
> +		intel_de_write(display, DPST_CTL(intel_crtc->pipe),
> intel_de_read(display,
> +			       DPST_CTL(intel_crtc->pipe)) |
> DPST_CTL_RESTORE);
> +

From the WA it seems we need to write 0 in the above Guardband Interrupt Delay Counter (bits 23:16) when servicing interrupts
And only write value read from dpst_ctl when enabling  dpst_config or doing an adjustment

Regards,
Suraj Kandpal

>  	/* Enable histogram interrupt */
>  	intel_de_rmw(display, DPST_GUARD(intel_crtc->pipe),
> DPST_GUARD_HIST_INT_EN,
>  		     DPST_GUARD_HIST_INT_EN);
> @@ -240,6 +251,12 @@ int intel_histogram_set_iet_lut(struct intel_crtc
> *intel_crtc, u32 *data)
>  		return -EINVAL;
>  	}
> 
> +	/* Wa: 14014889975 */
> +	if (IS_DISPLAY_VER(display, 12, 13))
> +		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt
> Delay Counter(bit 23:16) */
> +		intel_de_write(display, DPST_CTL(intel_crtc->pipe),
> intel_de_read(display,
> +			       DPST_CTL(intel_crtc->pipe)) |
> DPST_CTL_RESTORE);
> +
>  	/*
>  	 * Set DPST_CTL Bin Reg function select to IE
>  	 * Set DPST_CTL Bin Register Index to 0 diff --git
> a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> index 1252b4f339a6..e50b1448bd40 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> @@ -16,6 +16,7 @@
>  #define  DPST_CTL_RESTORE				REG_BIT(28)
>  #define  DPST_CTL_IE_MODI_TABLE_EN			REG_BIT(27)
>  #define  DPST_CTL_HIST_MODE				REG_BIT(24)
> +#define  DPST_CTL_GUARDBAND_INTERRUPT_DELAY_CNT
> 	REG_GENMASK(23, 16)
>  #define  DPST_CTL_ENHANCEMENT_MODE_MASK
> 	REG_GENMASK(14, 13)
>  #define  DPST_CTL_EN_MULTIPLICATIVE
> 	REG_FIELD_PREP(DPST_CTL_ENHANCEMENT_MODE_MASK, 2)
>  #define  DPST_CTL_IE_TABLE_VALUE_FORMAT			REG_BIT(15)
> --
> 2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCH 8/8] drm/i915/histogram: Enable pipe dithering
  2024-11-19 10:45 ` [PATCH 8/8] drm/i915/histogram: Enable pipe dithering Arun R Murthy
@ 2024-11-20  9:13   ` Kandpal, Suraj
  2024-11-21 12:22     ` Murthy, Arun R
  0 siblings, 1 reply; 28+ messages in thread
From: Kandpal, Suraj @ 2024-11-20  9:13 UTC (permalink / raw)
  To: Murthy, Arun R, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
  Cc: Murthy, Arun R



> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of Arun
> R Murthy
> Sent: Tuesday, November 19, 2024 4:15 PM
> To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: [PATCH 8/8] drm/i915/histogram: Enable pipe dithering
> 
> Enable pipe dithering while enabling histogram to overcome some atrifacts
> seen on the screen.

Where does it say this. I don't see it in the bspec.
Is this from testing that this was concluded in that case we perhaps need to make sure
that the bspec captures this

Regards,
Suraj Kandpal

> 
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_histogram.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> b/drivers/gpu/drm/i915/display/intel_histogram.c
> index beaad9256e01..d3c63da7e491 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -29,6 +29,13 @@ struct intel_histogram {
>  	u32 bin_data[HISTOGRAM_BIN_COUNT];
>  };
> 
> +static void intel_histogram_enable_dithering(struct intel_display *display,
> +					     enum pipe pipe)
> +{
> +	intel_de_rmw(display, PIPE_MISC(pipe), PIPE_MISC_DITHER_ENABLE,
> +		     PIPE_MISC_DITHER_ENABLE);
> +}
> +
>  static void set_bin_index_0(struct intel_display *display, enum pipe pipe)  {
>  	if (DISPLAY_VER(display) >= 20)
> @@ -205,6 +212,9 @@ static int intel_histogram_enable(struct intel_crtc
> *intel_crtc)
>  	if (histogram->enable)
>  		return 0;
> 
> +	/* Pipe Dithering should be enabled with histogram */
> +	intel_histogram_enable_dithering(display, pipe);
> +
>  	if (DISPLAY_VER(display) >= 20)
>  		intel_de_rmw(display, DPST_CTL(pipe),
>  			     DPST_CTL_IE_HIST_EN |
> --
> 2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+
  2024-11-19 10:45 ` [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+ Arun R Murthy
@ 2024-11-20 10:25   ` Kandpal, Suraj
  2024-11-21 12:20     ` Murthy, Arun R
  0 siblings, 1 reply; 28+ messages in thread
From: Kandpal, Suraj @ 2024-11-20 10:25 UTC (permalink / raw)
  To: Murthy, Arun R, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
  Cc: Murthy, Arun R



> -----Original Message-----
> From: Intel-xe <intel-xe-bounces@lists.freedesktop.org> On Behalf Of Arun R
> Murthy
> Sent: Tuesday, November 19, 2024 4:15 PM
> To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display
> 20+
> 
> In Display 20+, new registers are added for setting index, reading histogram
> and writing the IET.

Bspec reference for new registers being added please

> 
> v2: Removed duplicate code (Jani)
> v3: Moved histogram core changes to earlier patches (Jani/Suraj)
> v4: Rebased after addressing comments on patch 1
> 
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  .../gpu/drm/i915/display/intel_histogram.c    | 111 +++++++++++++-----
>  .../drm/i915/display/intel_histogram_regs.h   |  25 ++++
>  2 files changed, 105 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> b/drivers/gpu/drm/i915/display/intel_histogram.c
> index fdcc64677e96..beaad9256e01 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -29,6 +29,51 @@ struct intel_histogram {
>  	u32 bin_data[HISTOGRAM_BIN_COUNT];
>  };
> 
> +static void set_bin_index_0(struct intel_display *display, enum pipe
> +pipe) {
> +	if (DISPLAY_VER(display) >= 20)
> +		intel_de_rmw(display, DPST_IE_INDEX(pipe),
> +			     DPST_IE_BIN_INDEX_MASK,
> DPST_IE_BIN_INDEX(0));
> +	else
> +		intel_de_rmw(display, DPST_CTL(pipe),
> +			     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK,
> +			     DPST_CTL_BIN_REG_FUNC_IE |
> DPST_CTL_BIN_REG_CLEAR); }
> +
> +static void write_iet(struct intel_display *display, enum pipe pipe,
> +			      u32 *data)
> +{
> +	int i;
> +
> +	if (DISPLAY_VER(display) >= 20) {
> +		for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> +			intel_de_rmw(display, DPST_IE_BIN(pipe),
> +				     DPST_IE_BIN_DATA_MASK,
> +				     DPST_IE_BIN_DATA(data[i]));
> +			drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
> +				       i, data[i]);
> +		}
> +	} else {
> +		for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> +			intel_de_rmw(display, DPST_BIN(pipe),
> +				     DPST_BIN_DATA_MASK, data[i]);
> +			drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
> +				       i, data[i]);
> +		}
> +	}
> +}

The above code can be configured as shown below

int i;
int register_base, data_mask;

if (DISPLAY_VER(display) >= 20) {
    register_base = DPST_IE_BIN(pipe);
    data_mask = DPST_IE_BIN_DATA_MASK;
} else {
    register_base = DPST_BIN(pipe);
    data_mask = DPST_BIN_DATA_MASK;
}

for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
    intel_de_rmw(display, register_base, data_mask, data[i]);
    drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i, data[i]);
}

Regards,
Suraj Kandpal

> +
> +static void set_histogram_index_0(struct intel_display *display, enum
> +pipe pipe) {
> +	if (DISPLAY_VER(display) >= 20)
> +		intel_de_rmw(display, DPST_HIST_INDEX(pipe),
> +			     DPST_HIST_BIN_INDEX_MASK,
> +			     DPST_HIST_BIN_INDEX(0));
> +	else
> +		intel_de_rmw(display, DPST_CTL(pipe),
> +			     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK, 0); }
> +
>  static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)  {
>  	struct intel_display *display = to_intel_display(intel_crtc); @@ -40,9
> +85,13 @@ static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
>  	retry_count = 0;
> 
>  	while (index < HISTOGRAM_BIN_COUNT) {
> -		dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe));
> +		dpstbin = intel_de_read(display, (DISPLAY_VER(display) >= 20
> ?
> +					DPST_HIST_BIN(intel_crtc->pipe) :
> +					DPST_BIN(intel_crtc->pipe)));
>  		if (!(dpstbin & DPST_BIN_BUSY)) {
> -			histogram->bin_data[index] = dpstbin &
> DPST_BIN_DATA_MASK;
> +			histogram->bin_data[index] = dpstbin &
> (DISPLAY_VER(display) >= 20 ?
> +
> DPST_HIST_BIN_DATA_MASK :
> +
> DPST_BIN_DATA_MASK);
>  			index++;
>  		} else {
>  			/*
> @@ -58,9 +107,7 @@ static bool intel_histogram_get_data(struct intel_crtc
> *intel_crtc)
>  			/* Add a delay before retrying */
>  			fsleep(HISTOGRAM_BIN_READ_DELAY);
>  			index = 0;
> -			intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> -				     DPST_CTL_BIN_REG_FUNC_SEL |
> -				     DPST_CTL_BIN_REG_MASK, 0);
> +			set_histogram_index_0(display, intel_crtc->pipe);
>  		}
>  	}
>  	return true;
> @@ -84,8 +131,8 @@ static void intel_histogram_handle_int_work(struct
> work_struct *work)
>  	 * Set DPST_CTL Bin Reg function select to TC
>  	 * Set DPST_CTL Bin Register Index to 0
>  	 */
> -	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> -		     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK, 0);
> +	set_histogram_index_0(display, intel_crtc->pipe);
> +
>  	if (intel_histogram_get_data(intel_crtc)) {
>  		drm_property_replace_global_blob(display->drm,
>  				&intel_crtc->config->histogram.histogram,
> @@ -158,13 +205,20 @@ static int intel_histogram_enable(struct intel_crtc
> *intel_crtc)
>  	if (histogram->enable)
>  		return 0;
> 
> -	 /* enable histogram, clear DPST_BIN reg and select TC function */
> -	intel_de_rmw(display, DPST_CTL(pipe),
> -		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
> -		     DPST_CTL_HIST_MODE |
> DPST_CTL_IE_TABLE_VALUE_FORMAT,
> -		     DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
> -		     DPST_CTL_HIST_MODE_HSV |
> -		     DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
> +	if (DISPLAY_VER(display) >= 20)
> +		intel_de_rmw(display, DPST_CTL(pipe),
> +			     DPST_CTL_IE_HIST_EN |
> +			     DPST_CTL_HIST_MODE,
> +			     DPST_CTL_IE_HIST_EN |
> +			     DPST_CTL_HIST_MODE_HSV);
> +	else
> +		 /* enable histogram, clear DPST_BIN reg and select TC
> function */
> +		intel_de_rmw(display, DPST_CTL(pipe),
> +			     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_IE_HIST_EN |
> +			     DPST_CTL_HIST_MODE |
> DPST_CTL_IE_TABLE_VALUE_FORMAT,
> +			     DPST_CTL_BIN_REG_FUNC_TC |
> DPST_CTL_IE_HIST_EN |
> +			     DPST_CTL_HIST_MODE_HSV |
> +
> DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
> 
>  	/* Re-Visit: check if wait for one vblank is required */
>  	drm_crtc_wait_one_vblank(&intel_crtc->base);
> @@ -236,7 +290,6 @@ int intel_histogram_set_iet_lut(struct intel_crtc
> *intel_crtc, u32 *data)
>  	struct intel_histogram *histogram = intel_crtc->histogram;
>  	struct intel_display *display = to_intel_display(intel_crtc);
>  	int pipe = intel_crtc->pipe;
> -	int i = 0;
> 
>  	if (!histogram)
>  		return -EINVAL;
> @@ -261,24 +314,20 @@ int intel_histogram_set_iet_lut(struct intel_crtc
> *intel_crtc, u32 *data)
>  	 * Set DPST_CTL Bin Reg function select to IE
>  	 * Set DPST_CTL Bin Register Index to 0
>  	 */
> -	intel_de_rmw(display, DPST_CTL(pipe),
> -		     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK,
> -		     DPST_CTL_BIN_REG_FUNC_IE |
> DPST_CTL_BIN_REG_CLEAR);
> -
> -	for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> -		intel_de_rmw(display, DPST_BIN(pipe),
> -			     DPST_BIN_DATA_MASK, data[i]);
> -		drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i,
> data[i]);
> +	set_bin_index_0(display, pipe);
> +	write_iet(display, pipe, data);
> +	if (DISPLAY_VER(display) < 20) {
> +		intel_de_rmw(display, DPST_CTL(pipe),
> +			     DPST_CTL_ENHANCEMENT_MODE_MASK |
> +			     DPST_CTL_IE_MODI_TABLE_EN,
> +			     DPST_CTL_EN_MULTIPLICATIVE |
> +			     DPST_CTL_IE_MODI_TABLE_EN);
> +		/* Once IE is applied, change DPST CTL to TC */
> +		intel_de_rmw(display, DPST_CTL(pipe),
> +			     DPST_CTL_BIN_REG_FUNC_SEL,
> +			     DPST_CTL_BIN_REG_FUNC_TC);
>  	}
> 
> -	intel_de_rmw(display, DPST_CTL(pipe),
> -		     DPST_CTL_ENHANCEMENT_MODE_MASK |
> DPST_CTL_IE_MODI_TABLE_EN,
> -		     DPST_CTL_EN_MULTIPLICATIVE |
> DPST_CTL_IE_MODI_TABLE_EN);
> -
> -	/* Once IE is applied, change DPST CTL to TC */
> -	intel_de_rmw(display, DPST_CTL(pipe),
> -		     DPST_CTL_BIN_REG_FUNC_SEL,
> DPST_CTL_BIN_REG_FUNC_TC);
> -
>  	return 0;
>  }
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> index e50b1448bd40..2a52ac9282c1 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
> @@ -44,6 +44,31 @@
>  #define _DPST_BIN_B					0x491C4
>  #define DPST_BIN(pipe)
> 	_MMIO_PIPE(pipe, _DPST_BIN_A, _DPST_BIN_B)
>  #define  DPST_BIN_DATA_MASK
> 	REG_GENMASK(23, 0)
> +#define  DPST_BIN_DATA
> 	REG_FIELD_PREP(DPST_BIN_DATA_MASK, val)
>  #define  DPST_BIN_BUSY					REG_BIT(31)
> 
> +#define _DPST_HIST_INDEX_A				0x490D8
> +#define _DPST_HIST_INDEX_B				0x491D8
> +#define DPST_HIST_INDEX(pipe)
> 	_MMIO_PIPE(pipe, _DPST_HIST_INDEX_A, _DPST_HIST_INDEX_B)
> +#define  DPST_HIST_BIN_INDEX_MASK
> 	REG_GENMASK(4, 0)
> +#define  DPST_HIST_BIN_INDEX(val)
> 	REG_FIELD_PREP(DPST_HIST_BIN_INDEX_MASK, val)
> +
> +#define _DPST_HIST_BIN_A				0x490C4
> +#define _DPST_HIST_BIN_B				0x491C4
> +#define DPST_HIST_BIN(pipe)				_MMIO_PIPE(pipe,
> _DPST_HIST_BIN_A, _DPST_HIST_BIN_B)
> +#define  DPST_HIST_BIN_BUSY				REG_BIT(31)
> +#define  DPST_HIST_BIN_DATA_MASK
> 	REG_GENMASK(30, 0)
> +
> +#define _DPST_IE_BIN_A					0x490CC
> +#define _DPST_IE_BIN_B					0x491CC
> +#define DPST_IE_BIN(pipe)				_MMIO_PIPE(pipe,
> _DPST_IE_BIN_A, _DPST_IE_BIN_B)
> +#define	 DPST_IE_BIN_DATA_MASK
> 	REG_GENMASK(9, 0)
> +#define  DPST_IE_BIN_DATA(val)
> 	REG_FIELD_PREP(DPST_IE_BIN_DATA_MASK, val)
> +
> +#define _DPST_IE_INDEX_A				0x490DC
> +#define _DPST_IE_INDEX_B				0x491DC
> +#define DPST_IE_INDEX(pipe)				_MMIO_PIPE(pipe,
> _DPST_IE_INDEX_A, _DPST_IE_INDEX_B)
> +#define  DPST_IE_BIN_INDEX_MASK
> 	REG_GENMASK(6, 0)
> +#define  DPST_IE_BIN_INDEX(val)
> 	REG_FIELD_PREP(DPST_IE_BIN_INDEX_MASK, val)
> +
>  #endif /* __INTEL_HISTOGRAM_REGS_H__ */
> --
> 2.25.1


^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling
  2024-11-19 11:36   ` Jani Nikula
@ 2024-11-21  3:08     ` Murthy, Arun R
  0 siblings, 0 replies; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-21  3:08 UTC (permalink / raw)
  To: Jani Nikula, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org

> On Tue, 19 Nov 2024, Arun R Murthy <arun.r.murthy@intel.com> wrote:
> > Upon enabling histogram an interrupt is trigerred after the generation
> > of the statistics. This patch registers the histogram interrupt and
> > handles the interrupt.
> >
> > v2: Added intel_crtc backpointer to intel_histogram struct (Jani)
> >     Removed histogram_wq and instead use dev_priv->unodered_eq (Jani)
> > v3: Replaced drm_i915_private with intel_display (Suraj)
> >     Refactored the histogram read code (Jani)
> > v4: Rebased after addressing comments on patch 1
> >
> > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> > ---
> >  .../gpu/drm/i915/display/intel_display_irq.c  |  6 +-
> >  .../gpu/drm/i915/display/intel_histogram.c    | 93 +++++++++++++++++++
> >  .../gpu/drm/i915/display/intel_histogram.h    |  3 +
> >  drivers/gpu/drm/i915/i915_reg.h               |  5 +-
> >  4 files changed, 104 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c
> > b/drivers/gpu/drm/i915/display/intel_display_irq.c
> > index f0d3bdb5fc60..cb60c9db4418 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_irq.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c
> > @@ -20,6 +20,7 @@
> >  #include "intel_fdi_regs.h"
> >  #include "intel_fifo_underrun.h"
> >  #include "intel_gmbus.h"
> > +#include "intel_histogram.h"
> >  #include "intel_hotplug_irq.h"
> >  #include "intel_pipe_crc_regs.h"
> >  #include "intel_pmdemand.h"
> > @@ -1179,6 +1180,9 @@ void gen8_de_irq_handler(struct
> drm_i915_private *dev_priv, u32 master_ctl)
> >  		if (iir & GEN8_PIPE_FIFO_UNDERRUN)
> >  			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
> >
> > +		if (iir & GEN9_PIPE_HISTOGRAM_EVENT)
> > +			intel_histogram_irq_handler(display, pipe);
> > +
> >  		fault_errors = iir & gen8_de_pipe_fault_mask(dev_priv);
> >  		if (fault_errors)
> >  			drm_err_ratelimited(&dev_priv->drm,
> > @@ -1764,7 +1768,7 @@ void gen8_de_irq_postinstall(struct
> drm_i915_private *dev_priv)
> >  	struct intel_uncore *uncore = &dev_priv->uncore;
> >
> >  	u32 de_pipe_masked = gen8_de_pipe_fault_mask(dev_priv) |
> > -		GEN8_PIPE_CDCLK_CRC_DONE;
> > +		GEN8_PIPE_CDCLK_CRC_DONE |
> GEN9_PIPE_HISTOGRAM_EVENT;
> >  	u32 de_pipe_enables;
> >  	u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
> >  	u32 de_port_enables;
> > diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> > b/drivers/gpu/drm/i915/display/intel_histogram.c
> > index e751977fc6f7..16f29923ef10 100644
> > --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> > +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> > @@ -18,6 +18,8 @@
> >  #define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300    // 3.0% of
> the pipe's current pixel count.
> >  #define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000   // Precision
> factor for threshold guardband.
> >  #define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04
> > +#define HISTOGRAM_BIN_READ_RETRY_COUNT 5 #define
> > +HISTOGRAM_BIN_READ_DELAY 2
> 
> The above are only used once each. Please just put the values inline. Here, you
> don't even know what "2" means without looking up the code.
> 
> >
> >  struct intel_histogram {
> >  	struct intel_crtc *crtc;
> > @@ -27,6 +29,92 @@ struct intel_histogram {
> >  	u32 bin_data[HISTOGRAM_BIN_COUNT];
> >  };
> >
> > +static bool intel_histogram_get_data(struct intel_crtc *intel_crtc) {
> > +	struct intel_display *display = to_intel_display(intel_crtc);
> > +	struct intel_histogram *histogram = intel_crtc->histogram;
> > +	u8 index, retry_count;
> 
> These should be ints.
> 
> > +	u32 dpstbin;
> > +
> > +	index = 0;
> > +	retry_count = 0;
> > +
> > +	while (index < HISTOGRAM_BIN_COUNT) {
> 
> This should be a for loop
> 
> 	for (index = 0; index < ARRAY_SIZE(histogram->bin_data); i++)
> 
> Any retries should be handled in a separate loop instead of abusing the top
> level loop for two things.
> 
> Based on how this is now, looks like the retry loop should be outside of this
> function altogether? I.e. a single busy response leads to retry from start?
> 
> > +		dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe));
> > +		if (!(dpstbin & DPST_BIN_BUSY)) {
> > +			histogram->bin_data[index] = dpstbin &
> DPST_BIN_DATA_MASK;
> > +			index++;
> > +		} else {
> > +			/*
> > +			 * If DPST_BIN busy bit is set, then set the
> > +			 * DPST_CTL bin reg index to 0 and proceed
> > +			 * from beginning.
> > +			 */
> 
> That's just saying the same thing as the code in English. What's the point?
> 
> > +			retry_count++;
> > +			if (retry_count >
> HISTOGRAM_BIN_READ_RETRY_COUNT) {
> > +				drm_err(display->drm, "Histogram bin read
> failed with max retry\n");
> > +				return false;
> > +			}
> > +			/* Add a delay before retrying */
> 
> The comment says the same thing as the code.
> 
> > +			fsleep(HISTOGRAM_BIN_READ_DELAY);
> > +			index = 0;
> > +			intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> > +				     DPST_CTL_BIN_REG_FUNC_SEL |
> > +				     DPST_CTL_BIN_REG_MASK, 0);
> 
> This is duplicated; see the retry loop placement.
> 
> > +		}
> > +	}
> > +	return true;
> > +}
> > +
> > +static void intel_histogram_handle_int_work(struct work_struct *work)
> > +{
> > +	struct intel_histogram *histogram = container_of(work,
> > +		struct intel_histogram, work.work);
> > +	struct intel_crtc *intel_crtc = histogram->crtc;
> > +	struct intel_display *display = to_intel_display(intel_crtc);
> > +	char *histogram_event[] = {"HISTOGRAM=1", NULL};
> 
> Not sure it's great that this is a global uevent instead of having more detailed
> information. Maybe it should have the CRTC details?
> 

Done!

> > +
> > +	/*
> > +	 * TODO: PSR to be exited while reading the Histogram data
> > +	 * Set DPST_CTL Bin Reg function select to TC
> > +	 * Set DPST_CTL Bin Register Index to 0
> > +	 */
> > +	intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> > +		     DPST_CTL_BIN_REG_FUNC_SEL |
> DPST_CTL_BIN_REG_MASK, 0);
> > +	if (intel_histogram_get_data(intel_crtc)) {
> > +		/* Notify user for Histogram rediness */
> > +		if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
> > +				       KOBJ_CHANGE, histogram_event))
> > +			drm_err(display->drm,
> > +				"sending HISTOGRAM event failed\n");
> > +	}
> 
> So you probably want to add the retry loop here. This avoids duplicating the
> DPST_CTL rmw.
> 
Done!
But moved this retry change to 8th patch in this series where changes are LNL are done.

Thanks and Regards,
Arun R Murthy
--------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv4 2/8] drm/i915/histogram: Add support for histogram
  2024-11-20  8:13   ` Kandpal, Suraj
@ 2024-11-21  7:14     ` Murthy, Arun R
  0 siblings, 0 replies; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-21  7:14 UTC (permalink / raw)
  To: Kandpal, Suraj, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org

> > Statistics is generated from the image frame that is coming to display
> > and an event is sent to user after reading this histogram data.
> > This statistics/histogram is then shared with the user upon getting a
> > request from user. User can then use this histogram and generate an
> > enhancement factor. This enhancement factor can be multiplied/added
> > with the incoming pixel data frame.
> >
> > v2: forward declaration in header file along with error handling
> > (Jani)
> > v3: Replaced i915 with intel_display (Suraj)
> > v4: Removed dithering enable/disable (Vandita)
> >     New patch for histogram register definitions (Suraj)
> >
> 
> Mostly looks okay to me some minor comments and questions below
> 
> > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> > ---
> >  drivers/gpu/drm/i915/Makefile                 |   1 +
> >  .../drm/i915/display/intel_display_types.h    |   2 +
> >  .../gpu/drm/i915/display/intel_histogram.c    | 195 ++++++++++++++++++
> >  .../gpu/drm/i915/display/intel_histogram.h    |  35 ++++
> >  4 files changed, 233 insertions(+)
> >  create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.c
> >  create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.h
> >
> > diff --git a/drivers/gpu/drm/i915/Makefile
> > b/drivers/gpu/drm/i915/Makefile index e465828d748f..97141b4def3b
> > 100644
> > --- a/drivers/gpu/drm/i915/Makefile
> > +++ b/drivers/gpu/drm/i915/Makefile
> > @@ -267,6 +267,7 @@ i915-y += \
> >  	display/intel_hdcp.o \
> >  	display/intel_hdcp_gsc.o \
> >  	display/intel_hdcp_gsc_message.o \
> > +	display/intel_histogram.o \
> >  	display/intel_hotplug.o \
> >  	display/intel_hotplug_irq.o \
> >  	display/intel_hti.o \
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> > b/drivers/gpu/drm/i915/display/intel_display_types.h
> > index 339e4b0f7698..351441efd10a 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> > @@ -1414,6 +1414,8 @@ struct intel_crtc {
> >  	/* for loading single buffered registers during vblank */
> >  	struct pm_qos_request vblank_pm_qos;
> >
> > +	struct intel_histogram *histogram;
> > +
> >  #ifdef CONFIG_DEBUG_FS
> >  	struct intel_pipe_crc pipe_crc;
> >  #endif
> > diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> > b/drivers/gpu/drm/i915/display/intel_histogram.c
> > new file mode 100644
> > index 000000000000..e751977fc6f7
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> > @@ -0,0 +1,195 @@
> > +// SPDX-License-Identifier: MIT
> > +/*
> > + * Copyright © 2024 Intel Corporation  */
> > +
> > +#include <drm/drm_device.h>
> > +#include <drm/drm_file.h>
> > +#include <drm/drm_vblank.h>
> > +
> > +#include "i915_reg.h"
> > +#include "i915_drv.h"
> > +#include "intel_display.h"
> > +#include "intel_histogram_regs.h"
> > +#include "intel_histogram.h"
> > +#include "intel_display_types.h"
> > +#include "intel_de.h"
> 
> Rearrange the above definitions in alphabetical order so intel_de goes above
> intel display and Display types comes under  intel_display
> 
Done

> > +
> > +#define HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT 300    // 3.0% of
> > the pipe's current pixel count.
> > +#define HISTOGRAM_GUARDBAND_PRECISION_FACTOR 10000   // Precision
> > factor for threshold guardband.
> 
> Shouldn’t we be using /* xxxxx */ to make comments
> 
Done

> > +#define HISTOGRAM_DEFAULT_GUARDBAND_DELAY 0x04
> > +
> > +struct intel_histogram {
> > +	struct intel_crtc *crtc;
> > +	struct delayed_work work;
> > +	bool enable;
> > +	bool can_enable;
> > +	u32 bin_data[HISTOGRAM_BIN_COUNT];
> > +};
> > +
> > +int intel_histogram_atomic_check(struct intel_crtc *intel_crtc) {
> > +	struct intel_histogram *histogram = intel_crtc->histogram;
> > +
> > +	/* TODO: Restrictions for enabling histogram */
> 
> Should we at least add the restriction for the minimum  display version required
> to run DPST?
> 
We are not considering DPST over here. Its only the global histogram.
Remaining will be taken up in the upcoming patches.

> > +	histogram->can_enable = true;
> > +
> > +	return 0;
> > +}
> > +
> > +static int intel_histogram_enable(struct intel_crtc *intel_crtc) {
> > +	struct intel_display *display = to_intel_display(intel_crtc);
> > +	struct intel_histogram *histogram = intel_crtc->histogram;
> > +	int pipe = intel_crtc->pipe;
> > +	u64 res;
> > +	u32 gbandthreshold;
> > +
> > +	if (!histogram)
> > +		return -EINVAL;
> > +
> > +	if (!histogram->can_enable)
> > +		return -EINVAL;
> > +
> > +	if (histogram->enable)
> > +		return 0;
> > +
> > +	 /* enable histogram, clear DPST_BIN reg and select TC function */
> 
> I think you mean "Clear DPST_CTL bin reg func select to TC"
> Because that’s what I see on Bspec and also I don’t see you clearing DPST_BIN
> register
> 
Done

> > +	intel_de_rmw(display, DPST_CTL(pipe),
> > +		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
> > +		     DPST_CTL_HIST_MODE |
> > DPST_CTL_IE_TABLE_VALUE_FORMAT,
> > +		     DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
> > +		     DPST_CTL_HIST_MODE_HSV |
> > +		     DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC);
> > +
> > +	/* Re-Visit: check if wait for one vblank is required */
> > +	drm_crtc_wait_one_vblank(&intel_crtc->base);
> 
> Confused here so histogram will not be enabled for at least 2 vblanks and 3
> vblanks for display 12-14 after writing enable When enabled outside the active
> region so why just the single vblank wait ?
> 
Histogram is the statistics of 'n' number of frames. Generation of histogram event would take 2-3 vblanks as said. But here we are waiting for a vblank so as to enable histogram then program the guardband values.

> > +
> > +	/*
> > +	 * TODO: one time programming: Program GuardBand Threshold.
> > +	 * To be moved to modeset path
> > +	 */
> 
> The two : back to back seem dirty after the todo state in a single sentence what
> needs to be done
> 
Done

> > +	res = (intel_crtc->config->hw.adjusted_mode.vtotal *
> > +	       intel_crtc->config->hw.adjusted_mode.htotal);
> > +
> > +	gbandthreshold = (res *
> > 	HISTOGRAM_GUARDBAND_THRESHOLD_DEFAULT) /
> > +			  HISTOGRAM_GUARDBAND_PRECISION_FACTOR;
> 
> According to bspec this value i.e gbandthreshold "This value is shifted left 2 bits
> (multiplied by 4) for use with the 24 bit bin values."
> I don’t see that happening here is that on purpose?
> Also I don’t see any spec stating how you calculate this threshold can you point
> me to where this is written.
> 
Guardband threshold for 24bit bin data is chosen to be 12. But the value used in calculation is 3% and hw does x4 as per the register description.
The calculation is from the HLD.

> > +
> > +	/* Enable histogram interrupt mode */
> > +	intel_de_rmw(display, DPST_GUARD(pipe),
> > +		     DPST_GUARD_THRESHOLD_GB_MASK |
> > +		     DPST_GUARD_INTERRUPT_DELAY_MASK |
> > DPST_GUARD_HIST_INT_EN,
> > +		     DPST_GUARD_THRESHOLD_GB(gbandthreshold) |
> > +
> > DPST_GUARD_INTERRUPT_DELAY(HISTOGRAM_DEFAULT_GUARDBAND_DELA
> > Y) |
> 
> Where do we get the HISTOGRAM_DEFAULT_GUARDBAND_DELAY from ?
> 
We define it.

> > +		     DPST_GUARD_HIST_INT_EN);
> > +
> > +	/* Clear pending interrupts has to be done on separate write */
> > +	intel_de_rmw(display, DPST_GUARD(pipe),
> > +		     DPST_GUARD_HIST_EVENT_STATUS, 1);
> > +
> > +	histogram->enable = true;
> > +
> > +	return 0;
> > +}
> > +
> > +static void intel_histogram_disable(struct intel_crtc *intel_crtc) {
> > +	struct intel_display *display = to_intel_display(intel_crtc);
> > +	struct intel_histogram *histogram = intel_crtc->histogram;
> > +	int pipe = intel_crtc->pipe;
> > +
> > +	if (!histogram)
> > +		return;
> > +
> > +	/* If already disabled return */
> > +	if (histogram->enable)
> > +		return;
> > +
> > +	/* Clear pending interrupts and disable interrupts */
> > +	intel_de_rmw(display, DPST_GUARD(pipe),
> > +		     DPST_GUARD_HIST_INT_EN |
> > DPST_GUARD_HIST_EVENT_STATUS, 0);
> > +
> > +	/* disable DPST_CTL Histogram mode */
> > +	intel_de_rmw(display, DPST_CTL(pipe),
> > +		     DPST_CTL_IE_HIST_EN, 0);
> > +
> > +	histogram->enable = false;
> > +}
> > +
> > +int intel_histogram_update(struct intel_crtc *intel_crtc, bool
> > +enable) {
> > +	if (enable)
> > +		return intel_histogram_enable(intel_crtc);
> > +
> > +	intel_histogram_disable(intel_crtc);
> > +	return 0;
> > +}
> > +
> > +int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc, u32
> > +*data) {
> > +	struct intel_histogram *histogram = intel_crtc->histogram;
> > +	struct intel_display *display = to_intel_display(intel_crtc);
> > +	int pipe = intel_crtc->pipe;
> > +	int i = 0;
> > +
> > +	if (!histogram)
> > +		return -EINVAL;
> > +
> > +	if (!histogram->enable) {
> > +		drm_err(display->drm, "histogram not enabled");
> > +		return -EINVAL;
> > +	}
> > +
> > +	if (!data) {
> > +		drm_err(display->drm, "enhancement LUT data is NULL");
> > +		return -EINVAL;
> > +	}
> > +
> > +	/*
> > +	 * Set DPST_CTL Bin Reg function select to IE
> > +	 * Set DPST_CTL Bin Register Index to 0
> > +	 */
> > +	intel_de_rmw(display, DPST_CTL(pipe),
> > +		     DPST_CTL_BIN_REG_FUNC_SEL |
> > DPST_CTL_BIN_REG_MASK,
> > +		     DPST_CTL_BIN_REG_FUNC_IE |
> > DPST_CTL_BIN_REG_CLEAR);
> > +
> > +	for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> > +		intel_de_rmw(display, DPST_BIN(pipe),
> > +			     DPST_BIN_DATA_MASK, data[i]);
> > +		drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i,
> > data[i]);
> > +	}
> > +
> > +	intel_de_rmw(display, DPST_CTL(pipe),
> > +		     DPST_CTL_ENHANCEMENT_MODE_MASK |
> > DPST_CTL_IE_MODI_TABLE_EN,
> > +		     DPST_CTL_EN_MULTIPLICATIVE |
> > DPST_CTL_IE_MODI_TABLE_EN);
> 
> According to Bspec we follow the below steps "
> 1)Set DPST_CTL Bin Register Function Select to IE 2)Wait for vertical blank for
> switch to IE mode, can skip if step 1 was done more than 1 vblank previously
> 3)Set DPST_CTL Bin Register Index to 0 4)Write enhancement factor to
> DPST_BIN Data 4)Go to step 4 until all 33 entries are written "
> The sequence in code seems reversed.
> Also I don’t see the vblank wait that need to be done after switching to IE
> mode.
> 
> 
Done

> > +
> > +	/* Once IE is applied, change DPST CTL to TC */
> > +	intel_de_rmw(display, DPST_CTL(pipe),
> > +		     DPST_CTL_BIN_REG_FUNC_SEL,
> > DPST_CTL_BIN_REG_FUNC_TC);
> > +
> > +	return 0;
> > +}
> > +
> > +void intel_histogram_finish(struct intel_crtc *intel_crtc) {
> > +	struct intel_histogram *histogram = intel_crtc->histogram;
> > +
> > +	kfree(histogram);
> > +}
> > +
> > +int intel_histogram_init(struct intel_crtc *intel_crtc) {
> > +	struct intel_histogram *histogram;
> > +
> > +	/* Allocate histogram internal struct */
> > +	histogram = kzalloc(sizeof(*histogram), GFP_KERNEL);
> > +	if (!histogram) {
> > +		return -ENOMEM;
> > +	}
> 
> No need for extra brackets
> 
Done

Thanks and Regards,
Arun R Murthy
--------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram
  2024-11-20  8:33   ` Kandpal, Suraj
@ 2024-11-21  7:19     ` Murthy, Arun R
  0 siblings, 0 replies; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-21  7:19 UTC (permalink / raw)
  To: Kandpal, Suraj, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org

> > CRTC properties have been added for enable/disable histogram, reading
> > the histogram data and writing the IET data.
> > "HISTOGRAM_EN" is the crtc property to enable/disable the global
> > histogram and takes a value 0/1 accordingly.
> > "Histogram" is a crtc property to read the binary histogram data.
> > "Global IET" is a crtc property to write the IET binary LUT data.
> >
> > v2: Read the histogram blob data before sending uevent (Jani)
> > v3: use drm_property_replace_blob_from_id (Vandita)
> >     Add substruct for histogram in intel_crtc_state (Jani)
> > v4:  Rebased after addressing comments on patch 1
> > v5: histogram check with old/new crtc_state (Suraj)
> >
> > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_atomic.c   |   5 +
> >  drivers/gpu/drm/i915/display/intel_crtc.c     | 168 +++++++++++++++++-
> >  drivers/gpu/drm/i915/display/intel_crtc.h     |   5 +
> >  drivers/gpu/drm/i915/display/intel_display.c  |  18 ++
> >  .../drm/i915/display/intel_display_types.h    |  13 ++
> >  .../gpu/drm/i915/display/intel_histogram.c    |   6 +
> >  6 files changed, 214 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
> > b/drivers/gpu/drm/i915/display/intel_atomic.c
> > index 03dc54c802d3..a0d64a20b01e 100644
> > --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> > +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> > @@ -246,6 +246,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
> >
> >  	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->uapi);
> >
> > +	if (crtc_state->histogram.global_iet)
> > +		drm_property_blob_get(crtc_state->histogram.global_iet);
> >  	/* copy color blobs */
> >  	if (crtc_state->hw.degamma_lut)
> >  		drm_property_blob_get(crtc_state->hw.degamma_lut);
> > @@ -278,6 +280,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
> >  	crtc_state->dsb_color_vblank = NULL;
> >  	crtc_state->dsb_commit = NULL;
> >  	crtc_state->use_dsb = false;
> > +	crtc_state->histogram.histogram_enable_changed = false;
> >
> >  	return &crtc_state->uapi;
> >  }
> > @@ -314,6 +317,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
> >  	drm_WARN_ON(crtc->dev, crtc_state->dsb_color_vblank);
> >  	drm_WARN_ON(crtc->dev, crtc_state->dsb_commit);
> >
> > +	if (crtc_state->histogram.global_iet)
> > +		drm_property_blob_put(crtc_state->histogram.global_iet);
> >  	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
> >  	intel_crtc_free_hw_state(crtc_state);
> >  	if (crtc_state->dp_tunnel_ref.tunnel)
> > diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
> > b/drivers/gpu/drm/i915/display/intel_crtc.c
> > index a2c528d707f4..3be81a5a789b 100644
> > --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> > +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> > @@ -11,6 +11,7 @@
> >  #include <drm/drm_plane.h>
> >  #include <drm/drm_vblank.h>
> >  #include <drm/drm_vblank_work.h>
> > +#include <drm/drm_atomic_uapi.h>
> >
> >  #include "i915_vgpu.h"
> >  #include "i9xx_plane.h"
> > @@ -27,6 +28,7 @@
> >  #include "intel_drrs.h"
> >  #include "intel_dsi.h"
> >  #include "intel_fifo_underrun.h"
> > +#include "intel_histogram.h"
> >  #include "intel_pipe_crc.h"
> >  #include "intel_psr.h"
> >  #include "intel_sprite.h"
> > @@ -210,6 +212,7 @@ static struct intel_crtc *intel_crtc_alloc(void)
> > static void intel_crtc_free(struct intel_crtc *crtc)  {
> >  	intel_crtc_destroy_state(&crtc->base, crtc->base.state);
> > +	intel_histogram_finish(crtc);
> >  	kfree(crtc);
> >  }
> >
> > @@ -229,6 +232,66 @@ static int intel_crtc_late_register(struct
> > drm_crtc
> > *crtc)
> >  	return 0;
> >  }
> >
> > +static int intel_crtc_get_property(struct drm_crtc *crtc,
> > +				   const struct drm_crtc_state *state,
> > +				   struct drm_property *property,
> > +				   uint64_t *val)
> > +{
> > +	struct drm_i915_private *i915 = to_i915(crtc->dev);
> > +	const struct intel_crtc_state *intel_crtc_state =
> > +		to_intel_crtc_state(state);
> > +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> > +
> > +	if (property == intel_crtc->histogram_en_property) {
> > +		*val = intel_crtc_state->histogram.histogram_enable;
> > +	} else if (property == intel_crtc->global_iet_property) {
> > +		*val = (intel_crtc_state->histogram.global_iet) ?
> > +			intel_crtc_state->histogram.global_iet->base.id : 0;
> > +	} else if (property == intel_crtc->histogram_property) {
> > +		*val = (intel_crtc_state->histogram.histogram) ?
> > +			intel_crtc_state->histogram.histogram->base.id : 0;
> > +	} else {
> > +		drm_err(&i915->drm,
> > +			"Unknown property [PROP:%d:%s]\n",
> > +			property->base.id, property->name);
> > +		return -EINVAL;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int intel_crtc_set_property(struct drm_crtc *crtc,
> > +				   struct drm_crtc_state *state,
> > +				   struct drm_property *property,
> > +				   u64 val)
> > +{
> > +	struct drm_i915_private *i915 = to_i915(crtc->dev);
> > +	struct intel_crtc_state *intel_crtc_state =
> > +		to_intel_crtc_state(state);
> > +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> > +	bool replaced = false;
> > +
> > +	if (property == intel_crtc->histogram_en_property) {
> > +		intel_crtc_state->histogram.histogram_enable = val;
> > +		return 0;
> > +	}
> > +
> > +	if (property == intel_crtc->global_iet_property) {
> > +		drm_property_replace_blob_from_id(crtc->dev,
> > +						  &intel_crtc_state-
> > >histogram.global_iet,
> > +						  val,
> > +						  sizeof(uint32_t) *
> > HISTOGRAM_IET_LENGTH,
> > +						  -1, &replaced);
> > +		if (replaced)
> > +			intel_crtc_state->histogram.global_iet_changed =
> > true;
> > +		return 0;
> > +	}
> > +
> > +	drm_dbg_atomic(&i915->drm, "Unknown property [PROP:%d:%s]\n",
> > +		       property->base.id, property->name);
> > +	return -EINVAL;
> > +}
> > +
> >  #define INTEL_CRTC_FUNCS \
> >  	.set_config = drm_atomic_helper_set_config, \
> >  	.destroy = intel_crtc_destroy, \
> > @@ -238,7 +301,9 @@ static int intel_crtc_late_register(struct drm_crtc
> *crtc)
> >  	.set_crc_source = intel_crtc_set_crc_source, \
> >  	.verify_crc_source = intel_crtc_verify_crc_source, \
> >  	.get_crc_sources = intel_crtc_get_crc_sources, \
> > -	.late_register = intel_crtc_late_register
> > +	.late_register = intel_crtc_late_register, \
> > +	.atomic_set_property = intel_crtc_set_property, \
> > +	.atomic_get_property = intel_crtc_get_property
> >
> >  static const struct drm_crtc_funcs bdw_crtc_funcs = {
> >  	INTEL_CRTC_FUNCS,
> > @@ -383,6 +448,10 @@ int intel_crtc_init(struct drm_i915_private
> > *dev_priv, enum pipe pipe)
> >  	intel_color_crtc_init(crtc);
> >  	intel_drrs_crtc_init(crtc);
> >  	intel_crtc_crc_init(crtc);
> > +	intel_histogram_init(crtc);
> > +
> > +	/* Initialize crtc properties */
> > +	intel_crtc_add_property(crtc);
> >
> >  	cpu_latency_qos_add_request(&crtc->vblank_pm_qos,
> > PM_QOS_DEFAULT_VALUE);
> >
> > @@ -737,3 +806,100 @@ void intel_pipe_update_end(struct
> > intel_atomic_state *state,
> >  out:
> >  	intel_psr_unlock(new_crtc_state);
> >  }
> > +
> > +static const struct drm_prop_enum_list histogram_enable_names[] = {
> > +	{ INTEL_HISTOGRAM_DISABLE, "Disable" },
> > +	{ INTEL_HISTOGRAM_ENABLE, "Enable" }, };
> > +
> > +/**
> > + * intel_attach_histogram_en_property() - add property to
> > +enable/disable histogram
> > + * @intel_crtc: pointer to the struct intel_crtc on which the global
> > +histogram
> > is to
> > + *		be enabled/disabled
> > + *
> > + * "HISTOGRAM_EN" is the crtc propety to enable/disable global
> > +histogram  */ void intel_attach_histogram_en_property(struct
> > +intel_crtc
> > +*intel_crtc) {
> > +	struct drm_crtc *crtc = &intel_crtc->base;
> > +	struct drm_device *dev = crtc->dev;
> > +	struct drm_property *prop;
> > +
> > +	prop = intel_crtc->histogram_en_property;
> > +	if (!prop) {
> > +		prop = drm_property_create_enum(dev, 0,
> > +						"Histogram_Enable",
> > +						histogram_enable_names,
> > +
> > 	ARRAY_SIZE(histogram_enable_names));
> > +		if (!prop)
> > +			return;
> > +
> > +		intel_crtc->histogram_en_property = prop;
> > +	}
> > +
> > +	drm_object_attach_property(&crtc->base, prop, 0); }
> > +
> > +/**
> > + * intel_attach_global_iet_property() - add property to write Image
> > +Enhancement data
> > + * @intel_crtc: pointer to the struct intel_crtc on which global
> > +histogram is enabled
> > + *
> > + * "Global IET" is the crtc property to write the Image Enhancement
> > +LUT binary data  */ void intel_attach_global_iet_property(struct
> > +intel_crtc
> > +*intel_crtc) {
> > +	struct drm_crtc *crtc = &intel_crtc->base;
> > +	struct drm_device *dev = crtc->dev;
> > +	struct drm_property *prop;
> > +
> > +	prop = intel_crtc->global_iet_property;
> > +	if (!prop) {
> > +		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
> > DRM_MODE_PROP_ATOMIC,
> > +					   "Global IET", 0);
> > +		if (!prop)
> > +			return;
> > +
> > +		intel_crtc->global_iet_property = prop;
> > +	}
> > +
> > +	drm_object_attach_property(&crtc->base, prop, 0); }
> > +
> > +/**
> > + * intel_attach_histogram_property() - crtc property to read the histogram.
> > + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram
> > + *		was enabled.
> > + * "Global Histogram" is the crtc property to read the binary histogram data.
> > + */
> > +void intel_attach_histogram_property(struct intel_crtc *intel_crtc) {
> > +	struct drm_crtc *crtc = &intel_crtc->base;
> > +	struct drm_device *dev = crtc->dev;
> > +	struct drm_property *prop;
> > +	struct drm_property_blob *blob;
> > +
> > +	prop = intel_crtc->histogram_property;
> > +	if (!prop) {
> > +		prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
> > +					   DRM_MODE_PROP_ATOMIC |
> > +					   DRM_MODE_PROP_IMMUTABLE,
> > +					   "Global Histogram", 0);
> > +		if (!prop)
> > +			return;
> > +
> > +		intel_crtc->histogram_property = prop;
> > +	}
> > +	blob = drm_property_create_blob(dev, sizeof(uint32_t) *
> > HISTOGRAM_BIN_COUNT, NULL);
> > +	intel_crtc->config->histogram.histogram = blob;
> > +
> > +	drm_object_attach_property(&crtc->base, prop, blob->base.id); }
> > +
> > +int intel_crtc_add_property(struct intel_crtc *intel_crtc) {
> > +	intel_attach_histogram_en_property(intel_crtc);
> > +	intel_attach_histogram_property(intel_crtc);
> > +	intel_attach_global_iet_property(intel_crtc);
> > +
> > +	return 0;
> > +}
> > diff --git a/drivers/gpu/drm/i915/display/intel_crtc.h
> > b/drivers/gpu/drm/i915/display/intel_crtc.h
> > index de54ae1deedf..4e0a3c43d4f8 100644
> > --- a/drivers/gpu/drm/i915/display/intel_crtc.h
> > +++ b/drivers/gpu/drm/i915/display/intel_crtc.h
> > @@ -7,6 +7,7 @@
> >  #define _INTEL_CRTC_H_
> >
> >  #include <linux/types.h>
> > +#include <drm/drm_crtc.h>
> >
> >  enum i9xx_plane_id;
> >  enum pipe;
> > @@ -59,4 +60,8 @@ void intel_wait_for_vblank_if_active(struct
> > drm_i915_private *i915,
> >  				     enum pipe pipe);
> >  void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
> >
> > +int intel_crtc_add_property(struct intel_crtc *intel_crtc); void
> > +intel_attach_histogram_en_property(struct intel_crtc *intel_crtc);
> > +void intel_attach_global_iet_property(struct intel_crtc *intel_crtc);
> > +void intel_attach_histogram_property(struct intel_crtc *intel_crtc);
> >  #endif
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index e790a2de5b3d..0c3008a2d774 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -93,6 +93,7 @@
> >  #include "intel_fifo_underrun.h"
> >  #include "intel_frontbuffer.h"
> >  #include "intel_hdmi.h"
> > +#include "intel_histogram.h"
> >  #include "intel_hotplug.h"
> >  #include "intel_link_bw.h"
> >  #include "intel_lvds.h"
> > @@ -4607,6 +4608,10 @@ static int intel_crtc_atomic_check(struct
> > intel_atomic_state *state,
> >  	if (ret)
> >  		return ret;
> >
> > +	/* HISTOGRAM changed */
> 
> No need for the above comment
> 
Done

Thanks and Regards,
Arun R Murthy
--------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset
  2024-11-20  9:09   ` Kandpal, Suraj
@ 2024-11-21 12:04     ` Murthy, Arun R
  0 siblings, 0 replies; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-21 12:04 UTC (permalink / raw)
  To: Kandpal, Suraj, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org

> > -----Original Message-----
> > From: Intel-xe <intel-xe-bounces@lists.freedesktop.org> On Behalf Of
> > Arun R Murthy
> > Sent: Tuesday, November 19, 2024 4:15 PM
> > To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org;
> > dri- devel@lists.freedesktop.org
> > Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> > Subject: [PATCH 6/8] drm/i915/histogram: histogram delay counter
> > doesnt reset
> >
> > The delay counter for histogram does not reset and as a result the
> > histogram bin never gets updated. Workaround would be to use save and
> > restore histogram register.
> > Wa: 14014889975
> 
> This should be above the Signed-off-by
> 
> >
> > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_histogram.c  | 17
> > +++++++++++++++++ .../gpu/drm/i915/display/intel_histogram_regs.h |  1
> > +
> >  2 files changed, 18 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> > b/drivers/gpu/drm/i915/display/intel_histogram.c
> > index cba65f4260cd..fdcc64677e96 100644
> > --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> > +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> > @@ -74,6 +74,11 @@ static void intel_histogram_handle_int_work(struct
> > work_struct *work)
> >  	struct intel_display *display = to_intel_display(intel_crtc);
> >  	char *histogram_event[] = {"HISTOGRAM=1", NULL};
> >
> > +	/* Wa: 14014889975 */
> > +	if (IS_DISPLAY_VER(display, 12, 13))
> 
> We have shifted to using is_display_verx100 so you can use that instead Also
> there is no display ver 13 just 12 and then 14 so maybe this should be just
> display_ver == 12
> 
HSD mentioned above says display ver 13 ADL.
The commit 5eb2e7855910561a07d4cedf9c898624899b057b changes IS_DISPLAY_VER_FULL to IS_DISPLAY_VERx100
Here we are using IS_DISPLAY_VER()

> 
> > +		intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
> > +			     DPST_CTL_RESTORE, 0);
> > +
> >  	/*
> >  	 * TODO: PSR to be exited while reading the Histogram data
> >  	 * Set DPST_CTL Bin Reg function select to TC @@ -94,6 +99,12 @@
> > static void intel_histogram_handle_int_work(struct work_struct *work)
> >  				"sending HISTOGRAM event failed\n");
> >  	}
> >
> > +	/* Wa: 14014889975 */
> > +	if (IS_DISPLAY_VER(display, 12, 13))
> > +		/* Write the value read from DPST_CTL to DPST_CTL.Interrupt
> > Delay Counter(bit 23:16) */
> > +		intel_de_write(display, DPST_CTL(intel_crtc->pipe),
> > intel_de_read(display,
> > +			       DPST_CTL(intel_crtc->pipe)) |
> > DPST_CTL_RESTORE);
> > +
> 
> From the WA it seems we need to write 0 in the above Guardband Interrupt
> Delay Counter (bits 23:16) when servicing interrupts And only write value read
> from dpst_ctl when enabling  dpst_config or doing an adjustment
> 
Done!

Thanks and Regards,
Arun R Murthy
--------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+
  2024-11-20 10:25   ` Kandpal, Suraj
@ 2024-11-21 12:20     ` Murthy, Arun R
  0 siblings, 0 replies; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-21 12:20 UTC (permalink / raw)
  To: Kandpal, Suraj, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org



> -----Original Message-----
> From: Kandpal, Suraj <suraj.kandpal@intel.com>
> Sent: Wednesday, November 20, 2024 3:55 PM
> To: Murthy, Arun R <arun.r.murthy@intel.com>; intel-xe@lists.freedesktop.org;
> intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org
> Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> Subject: RE: [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display
> 20+
> 
> 
> 
> > -----Original Message-----
> > From: Intel-xe <intel-xe-bounces@lists.freedesktop.org> On Behalf Of
> > Arun R Murthy
> > Sent: Tuesday, November 19, 2024 4:15 PM
> > To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org;
> > dri- devel@lists.freedesktop.org
> > Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> > Subject: [PATCHv4 7/8] drm/i915/histogram: Histogram changes for
> > Display
> > 20+
> >
> > In Display 20+, new registers are added for setting index, reading
> > histogram and writing the IET.
> 
> Bspec reference for new registers being added please
> 
> >
> > v2: Removed duplicate code (Jani)
> > v3: Moved histogram core changes to earlier patches (Jani/Suraj)
> > v4: Rebased after addressing comments on patch 1
> >
> > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> > ---
> >  .../gpu/drm/i915/display/intel_histogram.c    | 111 +++++++++++++-----
> >  .../drm/i915/display/intel_histogram_regs.h   |  25 ++++
> >  2 files changed, 105 insertions(+), 31 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c
> > b/drivers/gpu/drm/i915/display/intel_histogram.c
> > index fdcc64677e96..beaad9256e01 100644
> > --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> > +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> > @@ -29,6 +29,51 @@ struct intel_histogram {
> >  	u32 bin_data[HISTOGRAM_BIN_COUNT];
> >  };
> >
> > +static void set_bin_index_0(struct intel_display *display, enum pipe
> > +pipe) {
> > +	if (DISPLAY_VER(display) >= 20)
> > +		intel_de_rmw(display, DPST_IE_INDEX(pipe),
> > +			     DPST_IE_BIN_INDEX_MASK,
> > DPST_IE_BIN_INDEX(0));
> > +	else
> > +		intel_de_rmw(display, DPST_CTL(pipe),
> > +			     DPST_CTL_BIN_REG_FUNC_SEL |
> > DPST_CTL_BIN_REG_MASK,
> > +			     DPST_CTL_BIN_REG_FUNC_IE |
> > DPST_CTL_BIN_REG_CLEAR); }
> > +
> > +static void write_iet(struct intel_display *display, enum pipe pipe,
> > +			      u32 *data)
> > +{
> > +	int i;
> > +
> > +	if (DISPLAY_VER(display) >= 20) {
> > +		for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> > +			intel_de_rmw(display, DPST_IE_BIN(pipe),
> > +				     DPST_IE_BIN_DATA_MASK,
> > +				     DPST_IE_BIN_DATA(data[i]));
> > +			drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
> > +				       i, data[i]);
> > +		}
> > +	} else {
> > +		for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
> > +			intel_de_rmw(display, DPST_BIN(pipe),
> > +				     DPST_BIN_DATA_MASK, data[i]);
> > +			drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
> > +				       i, data[i]);
> > +		}
> > +	}
> > +}
> 
> The above code can be configured as shown below
> 
> int i;
> int register_base, data_mask;
> 
> if (DISPLAY_VER(display) >= 20) {
>     register_base = DPST_IE_BIN(pipe);
>     data_mask = DPST_IE_BIN_DATA_MASK;
> } else {
>     register_base = DPST_BIN(pipe);
>     data_mask = DPST_BIN_DATA_MASK;
> }
> 
> for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
>     intel_de_rmw(display, register_base, data_mask, data[i]);
>     drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i, data[i]); }
> 

Writing the data[i] to be writing to the reg bit config also varies.
So rewriting this code within the for loop to optimize the code.

Thanks and Regards,
Arun R Murthy
-------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

* RE: [PATCH 8/8] drm/i915/histogram: Enable pipe dithering
  2024-11-20  9:13   ` Kandpal, Suraj
@ 2024-11-21 12:22     ` Murthy, Arun R
  0 siblings, 0 replies; 28+ messages in thread
From: Murthy, Arun R @ 2024-11-21 12:22 UTC (permalink / raw)
  To: Kandpal, Suraj, intel-xe@lists.freedesktop.org,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org

> > -----Original Message-----
> > From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of
> > Arun R Murthy
> > Sent: Tuesday, November 19, 2024 4:15 PM
> > To: intel-xe@lists.freedesktop.org; intel-gfx@lists.freedesktop.org;
> > dri- devel@lists.freedesktop.org
> > Cc: Murthy, Arun R <arun.r.murthy@intel.com>
> > Subject: [PATCH 8/8] drm/i915/histogram: Enable pipe dithering
> >
> > Enable pipe dithering while enabling histogram to overcome some
> > atrifacts seen on the screen.
> 
> Where does it say this. I don't see it in the bspec.
> Is this from testing that this was concluded in that case we perhaps need to
> make sure that the bspec captures this
> 
Will check on updating the spec

Thanks and Regards,
Arun R Murthy
--------------------

^ permalink raw reply	[flat|nested] 28+ messages in thread

end of thread, other threads:[~2024-11-21 12:22 UTC | newest]

Thread overview: 28+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-11-19 10:45 [PATCHv5 0/8] Display Global Histogram Arun R Murthy
2024-11-19 10:45 ` [PATCHv2 1/8] drm/i915/histogram: Define registers for histogram Arun R Murthy
2024-11-20  7:17   ` Kandpal, Suraj
2024-11-19 10:45 ` [PATCHv4 2/8] drm/i915/histogram: Add support " Arun R Murthy
2024-11-20  8:13   ` Kandpal, Suraj
2024-11-21  7:14     ` Murthy, Arun R
2024-11-19 10:45 ` [PATCH 3/8] drm/xe: Add histogram support to Xe builds Arun R Murthy
2024-11-19 10:45 ` [PATCHv4 4/8] drm/i915/histogram: histogram interrupt handling Arun R Murthy
2024-11-19 11:36   ` Jani Nikula
2024-11-21  3:08     ` Murthy, Arun R
2024-11-19 10:45 ` [PATCHv5 5/8] drm/i915/histogram: Add crtc properties for global histogram Arun R Murthy
2024-11-19 11:41   ` Jani Nikula
2024-11-20  8:33   ` Kandpal, Suraj
2024-11-21  7:19     ` Murthy, Arun R
2024-11-19 10:45 ` [PATCH 6/8] drm/i915/histogram: histogram delay counter doesnt reset Arun R Murthy
2024-11-20  9:09   ` Kandpal, Suraj
2024-11-21 12:04     ` Murthy, Arun R
2024-11-19 10:45 ` [PATCHv4 7/8] drm/i915/histogram: Histogram changes for Display 20+ Arun R Murthy
2024-11-20 10:25   ` Kandpal, Suraj
2024-11-21 12:20     ` Murthy, Arun R
2024-11-19 10:45 ` [PATCH 8/8] drm/i915/histogram: Enable pipe dithering Arun R Murthy
2024-11-20  9:13   ` Kandpal, Suraj
2024-11-21 12:22     ` Murthy, Arun R
2024-11-19 11:33 ` ✗ Fi.CI.CHECKPATCH: warning for Display Global Histogram (rev6) Patchwork
2024-11-19 11:33 ` ✗ Fi.CI.SPARSE: " Patchwork
2024-11-19 12:39 ` [PATCHv5 0/8] Display Global Histogram Daniel Stone
2024-11-19 14:39   ` Murthy, Arun R
2024-11-19 15:18     ` Daniel Stone

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