[PATCH 0/2] drm: Create and use helper function

[PATCH 0/2] drm: Create and use helper function

[Christoph Manszewski]

Hello,

This patch series implements a generic helper function, to determine
the default color space format. I've tried to do it in analogy to 
an already existing function, but I'am not sure if it is done the right way.

Patch 1 implements the mentioned function
Patch 2 makes use of it in exynos_mixer.c

Regards,
Chris

Christoph Manszewski (2):
  drm/edid: Add colorimetry helper function
  drm/exynos: mixer: Use colorimetry helper function

 drivers/gpu/drm/drm_edid.c            | 12 ++++++++++++
 drivers/gpu/drm/exynos/exynos_mixer.c |  3 ++-
 include/drm/drm_edid.h                |  2 ++
 3 files changed, 16 insertions(+), 1 deletion(-)

-- 
2.7.4

[PATCH 1/2] drm/edid: Add colorimetry helper function

[Christoph Manszewski]

In analogy to drm_default_rgb_quant_range, create
drm_default_colorimetry helper function to determine the default
colorimetry value based on drm_display_mode. Currently there isn't any
standarized way to determine the default color space format.

Signed-off-by: Christoph Manszewski <c.manszewski@samsung.com>
---
 drivers/gpu/drm/drm_edid.c | 12 ++++++++++++
 include/drm/drm_edid.h     |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index b506e3622b08..03ac833dcc3c 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4278,6 +4278,18 @@ drm_default_rgb_quant_range(const struct drm_display_mode *mode)
 }
 EXPORT_SYMBOL(drm_default_rgb_quant_range);
 
+enum hdmi_colorimetry
+drm_default_colorimetry(const struct drm_display_mode *mode)
+{
+	if (mode->vdisplay < 720)
+		return HDMI_COLORIMETRY_ITU_601;
+	else if (mode->vdisplay <= 1080)
+		return HDMI_COLORIMETRY_ITU_709;
+	else
+		return HDMI_COLORIMETRY_EXTENDED;
+}
+EXPORT_SYMBOL(drm_default_colorimetry);
+
 static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector,
 					       const u8 *db)
 {
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index e3c404833115..da43a5d02f7f 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -474,6 +474,8 @@ bool drm_detect_monitor_audio(struct edid *edid);
 bool drm_rgb_quant_range_selectable(struct edid *edid);
 enum hdmi_quantization_range
 drm_default_rgb_quant_range(const struct drm_display_mode *mode);
+enum hdmi_colorimetry
+drm_default_colorimetry(const struct drm_display_mode *mode);
 int drm_add_modes_noedid(struct drm_connector *connector,
 			 int hdisplay, int vdisplay);
 void drm_set_preferred_mode(struct drm_connector *connector,
-- 
2.7.4

[PATCH 2/2] drm/exynos: mixer: Use colorimetry helper function

[Christoph Manszewski]

Use drm_default_colorimetry helper function to determine the default
colorspace type (ITU-R BT.601 or ITU-R BT.709).

Signed-off-by: Christoph Manszewski <c.manszewski@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_mixer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 2a25822bd6a1..895c6268025d 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -384,9 +384,10 @@ static void mixer_cfg_scan(struct mixer_context *ctx, int width, int height)
 static void mixer_cfg_rgb_fmt(struct mixer_context *ctx, struct drm_display_mode *mode)
 {
 	enum hdmi_quantization_range range = drm_default_rgb_quant_range(mode);
+	enum hdmi_colorimetry format = drm_default_colorimetry(mode);
 	u32 val;
 
-	if (mode->vdisplay < 720) {
+	if (format == HDMI_COLORIMETRY_ITU_601) {
 		val = MXR_CFG_RGB601;
 	} else {
 		val = MXR_CFG_RGB709;
-- 
2.7.4