The CEA extension block has a field which contains the YCbCr modes supported by the device. Use the information from this field to initialize the drm_display_info color_formats. Also the existence of a CEA extension block should allow us to assume that the device supports RGB.
Signed-off-by: Lars-Peter Clausen lars@metafoo.de --- drivers/gpu/drm/drm_edid.c | 31 +++++++++++++++++++++---------- 1 files changed, 21 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index a6bb2f5..390aeca 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1313,6 +1313,8 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid, #define VENDOR_BLOCK 0x03 #define SPEAKER_BLOCK 0x04 #define EDID_BASIC_AUDIO (1 << 6) +#define EDID_CEA_YCRCB444 (1 << 5) +#define EDID_CEA_YCRCB422 (1 << 4)
/** * Search EDID for CEA extension block. @@ -1667,13 +1669,29 @@ static void drm_add_display_info(struct edid *edid, info->bpc = 0; info->color_formats = 0;
- /* Only defined for 1.4 with digital displays */ - if (edid->revision < 4) + if (edid->revision < 3) return;
if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) return;
+ /* Get data from CEA blocks if present */ + edid_ext = drm_find_cea_extension(edid); + if (edid_ext) { + info->cea_rev = edid_ext[1]; + + /* The existence of a CEA block should imply RGB support */ + info->color_formats = DRM_COLOR_FORMAT_RGB444; + if (edid_ext[3] & EDID_CEA_YCRCB444) + info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; + if (edid_ext[3] & EDID_CEA_YCRCB422) + info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; + } + + /* Only defined for 1.4 with digital displays */ + if (edid->revision < 4) + return; + switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { case DRM_EDID_DIGITAL_DEPTH_6: info->bpc = 6; @@ -1699,18 +1717,11 @@ static void drm_add_display_info(struct edid *edid, break; }
- info->color_formats = DRM_COLOR_FORMAT_RGB444; + info->color_formats |= DRM_COLOR_FORMAT_RGB444; if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444) info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422) info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; - - /* Get data from CEA blocks if present */ - edid_ext = drm_find_cea_extension(edid); - if (!edid_ext) - return; - - info->cea_rev = edid_ext[1]; }
/**