[v5][PATCH 10/11] drm/i915: Extract ilk_read_luts()

Swati Sharma
2019-05-04T17:16:21Z

In this patch, hw gamma blob is created for ILK.

v4: -No need to initialize *blob [Jani]
-Removed right shifts [Jani]
-Dropped dev local var [Jani]
v5: -Returned blob instead of assigning it internally within the
function [Ville]
-Renamed ilk_get_color_config() to ilk_read_luts() [Ville]

Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 3 +++
drivers/gpu/drm/i915/intel_color.c | 42 ++++++++++++++++++++++++++++++++++++--
2 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7f47241..66127e2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7189,6 +7189,9 @@ enum {
/* ilk/snb precision palette */
#define _PREC_PALETTE_A 0x4b000
#define _PREC_PALETTE_B 0x4c000
+#define PREC_PALETTE_RED_MASK REG_GENMASK(29, 20)
+#define PREC_PALETTE_GREEN_MASK REG_GENMASK(19, 10)
+#define PREC_PALETTE_BLUE_MASK REG_GENMASK(9, 0)
#define PREC_PALETTE(pipe, i) _MMIO(_PIPE(pipe, _PREC_PALETTE_A, _PREC_PALETTE_B) + (i) * 4)

#define _PREC_PIPEAGCMAX 0x4d000
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index d8b120a..695b76d 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1593,6 +1593,43 @@ static void ivb_read_luts(struct intel_crtc_state *crtc_state)
}
}

+static struct drm_property_blob *
+ilk_read_gamma_lut(struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ u32 i, val, lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size;
+ enum pipe pipe = crtc->pipe;
+ struct drm_property_blob *blob;
+ struct drm_color_lut *blob_data;
+
+ blob = drm_property_create_blob(&dev_priv->drm,
+ sizeof(struct drm_color_lut) * lut_size,
+ NULL);
+ if (IS_ERR(blob))
+ return NULL;
+
+ blob_data = blob->data;
+
+ for (i = 0; i < lut_size - 1; i++) {
+ val = I915_READ(PREC_PALETTE(pipe, i));
+
+ blob_data[i].red = intel_color_lut_pack(REG_FIELD_GET(PREC_PALETTE_RED_MASK, val), 10);
+ blob_data[i].green = intel_color_lut_pack(REG_FIELD_GET(PREC_PALETTE_GREEN_MASK, val), 10);
+ blob_data[i].blue = intel_color_lut_pack(REG_FIELD_GET(PREC_PALETTE_BLUE_MASK, val), 10);
+ }
+
+ return blob;
+}
+
+static void ilk_read_luts(struct intel_crtc_state *crtc_state)
+{
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+ crtc_state->base.gamma_lut = i9xx_read_lut_8(crtc_state);
+ else
+ crtc_state->base.gamma_lut = ilk_read_gamma_lut(crtc_state);
+}
+
void intel_color_init(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -1646,9 +1683,10 @@ void intel_color_init(struct intel_crtc *crtc)
} else if (INTEL_GEN(dev_priv) >= 7) {
dev_priv->display.load_luts = ivb_load_luts;
dev_priv->display.read_luts = ivb_read_luts;
- }
- else
+ } else {
dev_priv->display.load_luts = ilk_load_luts;
+ dev_priv->display.read_luts = ilk_read_luts;
+ }
}

drm_crtc_enable_color_mgmt(&crtc->base,