[PATCH 2/3] drm/imx: convey the pixelclk-active and de-active flags from DT to the ipu-di driver

Lothar Waßmann
2016-05-20T13:53:23Z

Currently these flags are lost in the call
drm_display_mode_from_videomode()

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
---
drivers/gpu/drm/imx/imx-drm-core.c | 12 +++++++----
drivers/gpu/drm/imx/imx-drm.h | 7 ++++---
drivers/gpu/drm/imx/imx-ldb.c | 37 ++++++++++++++++++++++++++--------
drivers/gpu/drm/imx/ipuv3-crtc.c | 7 ++++---
drivers/gpu/drm/imx/parallel-display.c | 31 ++++++++++++++++++++++++----
drivers/gpu/ipu-v3/ipu-di.c | 14 +++++++------
include/video/imx-ipu-v3.h | 5 +----
7 files changed, 81 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 2453fb1..51735b1 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -96,7 +96,8 @@ static struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc)
return NULL;
}

-int imx_drm_set_bus_format_pins(struct drm_encoder *encoder, u32 bus_format,
+int imx_drm_set_bus_format_pins(struct drm_encoder *encoder,
+ u32 bus_format, u32 bus_flags,
int hsync_pin, int vsync_pin)
{
struct imx_drm_crtc_helper_funcs *helper;
@@ -109,14 +110,17 @@ int imx_drm_set_bus_format_pins(struct drm_encoder *encoder, u32 bus_format,
helper = &imx_crtc->imx_drm_helper_funcs;
if (helper->set_interface_pix_fmt)
return helper->set_interface_pix_fmt(encoder->crtc,
- bus_format, hsync_pin, vsync_pin);
+ bus_format, bus_flags,
+ hsync_pin, vsync_pin);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_set_bus_format_pins);

-int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format)
+int imx_drm_set_bus_format(struct drm_encoder *encoder, u32 bus_format,
+ u32 bus_flags)
{
- return imx_drm_set_bus_format_pins(encoder, bus_format, 2, 3);
+ return imx_drm_set_bus_format_pins(encoder, bus_format, bus_flags,
+ 2, 3);
}
EXPORT_SYMBOL_GPL(imx_drm_set_bus_format);

diff --git a/drivers/gpu/drm/imx/imx-drm.h b/drivers/gpu/drm/imx/imx-drm.h
index b0241b9..b74baf7 100644
--- a/drivers/gpu/drm/imx/imx-drm.h
+++ b/drivers/gpu/drm/imx/imx-drm.h
@@ -19,7 +19,8 @@ struct imx_drm_crtc_helper_funcs {
int (*enable_vblank)(struct drm_crtc *crtc);
void (*disable_vblank)(struct drm_crtc *crtc);
int (*set_interface_pix_fmt)(struct drm_crtc *crtc,
- u32 bus_format, int hsync_pin, int vsync_pin);
+ u32 bus_format, u32 bus_flags,
+ int hsync_pin, int vsync_pin);
const struct drm_crtc_helper_funcs *crtc_helper_funcs;
const struct drm_crtc_funcs *crtc_funcs;
};
@@ -42,9 +43,9 @@ void imx_drm_mode_config_init(struct drm_device *drm);
struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);

int imx_drm_set_bus_format_pins(struct drm_encoder *encoder,
- u32 bus_format, int hsync_pin, int vsync_pin);
+ u32 bus_format, u32 bus_flags, int hsync_pin, int vsync_pin);
int imx_drm_set_bus_format(struct drm_encoder *encoder,
- u32 bus_format);
+ u32 bus_format, u32 bus_flags);

int imx_drm_encoder_parse_of(struct drm_device *drm,
struct drm_encoder *encoder, struct device_node *np);
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index b2dc4df..67706eea 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -27,6 +27,7 @@
#include <linux/of_graph.h>
#include <video/of_display_timing.h>
#include <video/of_videomode.h>
+#include <video/videomode.h>
#include <linux/regmap.h>
#include <linux/videodev2.h>

@@ -65,7 +66,8 @@ struct imx_ldb_channel {
int edid_len;
struct drm_display_mode mode;
int mode_valid;
- int bus_format;
+ u32 bus_format;
+ u32 bus_flags;
};

struct bus_mux {
@@ -102,8 +104,10 @@ static int imx_ldb_connector_get_modes(struct drm_connector *connector)
struct drm_display_info *di = &connector->display_info;

num_modes = imx_ldb_ch->panel->funcs->get_modes(imx_ldb_ch->panel);
- if (!imx_ldb_ch->bus_format && di->num_bus_formats)
+ if (!imx_ldb_ch->bus_format && di->num_bus_formats) {
imx_ldb_ch->bus_format = di->bus_formats[0];
+ imx_ldb_ch->bus_flags = di->bus_flags;
+ }
if (num_modes > 0)
return num_modes;
}
@@ -202,7 +206,8 @@ static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
break;
}

- imx_drm_set_bus_format(encoder, bus_format);
+ imx_drm_set_bus_format(encoder, bus_format,
+ imx_ldb_ch->bus_flags);
}

static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
@@ -558,7 +563,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)

ret = of_property_read_u32(child, "reg", &i);
if (ret || i < 0 || i > 1)
- return -EINVAL;
+ return ret ?: -EINVAL;

if (dual && i > 0) {
dev_warn(dev, "dual-channel mode, ignoring second output\n");
@@ -601,10 +606,26 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
channel->edid = kmemdup(edidp, channel->edid_len,
GFP_KERNEL);
} else if (!channel->panel) {
- ret = of_get_drm_display_mode(child, &channel->mode,
- OF_USE_NATIVE_MODE);
- if (!ret)
- channel->mode_valid = 1;
+ struct videomode vm;
+
+ ret = of_get_videomode(child, &vm, OF_USE_NATIVE_MODE);
+ if (ret)
+ return ret;
+
+ drm_display_mode_from_videomode(&vm, &channel->mode);
+
+ if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+ channel->bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+ if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+ channel->bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+
+ if (vm.flags & DISPLAY_FLAGS_DE_LOW)
+ channel->bus_flags |= DRM_BUS_FLAG_DE_LOW;
+ if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
+ channel->bus_flags |= DRM_BUS_FLAG_DE_HIGH;
+
+ drm_mode_debug_printmodeline(&channel->mode);
+ channel->mode_valid = 1;
}

channel->bus_format = of_get_bus_format(dev, child);
diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index dee8e8b..3fb9ac7 100644
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -66,6 +66,7 @@ struct ipu_crtc {
struct ipu_flip_work *flip_work;
int irq;
u32 bus_format;
+ u32 bus_flags;
int di_hsync_pin;
int di_vsync_pin;
};
@@ -271,9 +272,8 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc,
else
sig_cfg.clkflags = 0;

- sig_cfg.enable_pol = 1;
- sig_cfg.clk_pol = 0;
sig_cfg.bus_format = ipu_crtc->bus_format;
+ sig_cfg.bus_flags = ipu_crtc->bus_flags;
sig_cfg.v_to_h_sync = 0;
sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
@@ -396,11 +396,12 @@ static void ipu_disable_vblank(struct drm_crtc *crtc)
}

static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc,
- u32 bus_format, int hsync_pin, int vsync_pin)
+ u32 bus_format, u32 bus_flags, int hsync_pin, int vsync_pin)
{
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);

ipu_crtc->bus_format = bus_format;
+ ipu_crtc->bus_flags = bus_flags;
ipu_crtc->di_hsync_pin = hsync_pin;
ipu_crtc->di_vsync_pin = vsync_pin;

diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 363e2c7..440f34d 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -19,9 +19,12 @@
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_panel.h>
+#include <linux/of_graph.h>
#include <linux/videodev2.h>
+#include <video/display_timing.h>
#include <video/of_display_timing.h>
-#include <linux/of_graph.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>

#include "imx-drm.h"

@@ -35,6 +38,7 @@ struct imx_parallel_display {
void *edid;
int edid_len;
u32 bus_format;
+ u32 bus_flags;
int mode_valid;
struct drm_display_mode mode;
struct drm_panel *panel;
@@ -57,8 +61,10 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)
struct drm_display_info *di = &connector->display_info;

num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
- if (!imxpd->bus_format && di->num_bus_formats)
+ if (!imxpd->bus_format && di->num_bus_formats) {
imxpd->bus_format = di->bus_formats[0];
+ imxpd->bus_flags = di->bus_flags;
+ }
if (num_modes > 0)
return num_modes;
}
@@ -81,10 +87,27 @@ static int imx_pd_connector_get_modes(struct drm_connector *connector)

if (np) {
struct drm_display_mode *mode = drm_mode_create(connector->dev);
+ struct videomode vm;
+ int ret;

if (!mode)
return -EINVAL;
- of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
+
+ ret = of_get_videomode(np, &vm, OF_USE_NATIVE_MODE);
+ if (ret)
+ return ret;
+ drm_display_mode_from_videomode(&vm, &imxpd->mode);
+ drm_mode_debug_printmodeline(&imxpd->mode);
+
+ if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+ imxpd->bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+ if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+ imxpd->bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+
+ if (vm.flags & DISPLAY_FLAGS_DE_LOW)
+ imxpd->bus_flags |= DRM_BUS_FLAG_DE_LOW;
+ if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
+ imxpd->bus_flags |= DRM_BUS_FLAG_DE_HIGH;
drm_mode_copy(mode, &imxpd->mode);
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
drm_mode_probed_add(connector, mode);
@@ -116,7 +139,7 @@ static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
{
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

- imx_drm_set_bus_format(encoder, imxpd->bus_format);
+ imx_drm_set_bus_format(encoder, imxpd->bus_format, imxpd->bus_flags);
}

static void imx_pd_encoder_commit(struct drm_encoder *encoder)
diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
index 359268e..bff4701 100644
--- a/drivers/gpu/ipu-v3/ipu-di.c
+++ b/drivers/gpu/ipu-v3/ipu-di.c
@@ -20,6 +20,7 @@
#include <linux/err.h>
#include <linux/platform_device.h>

+#include <drm/drm_crtc.h>
#include <video/imx-ipu-v3.h>
#include "ipu-prv.h"

@@ -622,7 +623,9 @@ int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
di_gen |= ipu_di_gen_polarity(sig->vsync_pin);

- if (sig->clk_pol)
+ if (sig->bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)
+ di_gen &= ~DI_GEN_POLARITY_DISP_CLK;
+ else if (sig->bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE)
di_gen |= DI_GEN_POLARITY_DISP_CLK;

ipu_di_write(di, di_gen, DI_GENERAL);
@@ -630,13 +633,12 @@ int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
DI_SYNC_AS_GEN);

- reg = ipu_di_read(di, DI_POL);
- reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
+ reg = ipu_di_read(di, DI_POL) & ~DI_POL_DRDY_DATA_POLARITY;

- if (sig->enable_pol)
+ if (sig->bus_flags & DRM_BUS_FLAG_DE_HIGH)
reg |= DI_POL_DRDY_POLARITY_15;
- if (sig->data_pol)
- reg |= DI_POL_DRDY_DATA_POLARITY;
+ else if (sig->bus_flags & DRM_BUS_FLAG_DE_LOW)
+ reg &= ~DI_POL_DRDY_POLARITY_15;

ipu_di_write(di, reg, DI_POL);

diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index ad66589..7c64c55 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -33,13 +33,10 @@ enum ipuv3_type {
* Bitfield of Display Interface signal polarities.
*/
struct ipu_di_signal_cfg {
- unsigned data_pol:1; /* true = inverted */
- unsigned clk_pol:1; /* true = rising edge */
- unsigned enable_pol:1;
-
struct videomode mode;

u32 bus_format;
+ u32 bus_flags;
u32 v_to_h_sync;

#define IPU_DI_CLKMODE_SYNC (1 << 0)
--
2.1.4