EDID 1.4 digital displays report the color spaces they support in the
features block. Add support for grabbing this data and stuffing it into
the display_info struct for driver use.
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 6 ++++++
include/drm/drm_crtc.h | 5 ++++-
include/drm/drm_edid.h | 8 ++++++++
3 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 3518e1e..0a9357c 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1462,6 +1462,12 @@ static void drm_add_display_info(struct edid *edid,
info->bpc = 0;
break;
}
+
+ info->color_formats = DRM_COLOR_FORMAT_RGB444;
+ if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
+ info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
+ if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
+ info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
}
/**
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 4d8fbb0..d20aecb 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -183,7 +183,9 @@ enum subpixel_order {
SubPixelNone,
};
-
+#define DRM_COLOR_FORMAT_RGB444 (1<<0)
+#define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
+#define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
/*
* Describes a given display (e.g. CRT or flat panel) and its limitations.
*/
@@ -201,6 +203,7 @@ struct drm_display_info {
unsigned int bpc;
enum subpixel_order subpixel_order;
+ unsigned long color_formats;
char *raw_edid; /* if any */
};
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 9b9bf94..eacb415 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -175,7 +175,15 @@ struct detailed_timing {
#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
+/* If analog */
#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
+/* If digital */
+#define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
+#define DRM_EDID_FEATURE_RGB (0 << 3)
+#define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
+#define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
+#define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
+
#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
--
1.7.4.1
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