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| author | Maxime Ripard <maxime@cerno.tech> | 2022-01-20 18:16:12 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2022-01-25 12:01:24 +0300 |
| commit | 4adc33f36d80489339f1b43dfeee96bb9ea8e459 (patch) | |
| tree | 9eb5b00bdf8f1524774a43fa60f4bbdb31bcc183 /include/drm | |
| parent | 75478b3b393bcbdca4e6da76fe3a9f1a4133ec5d (diff) | |
| download | linux-4adc33f36d80489339f1b43dfeee96bb9ea8e459.tar.xz | |
drm/edid: Split deep color modes between RGB and YUV444
The current code assumes that the RGB444 and YUV444 formats are the
same, but the HDMI 2.0 specification states that:
The three DC_XXbit bits above only indicate support for RGB 4:4:4 at
that pixel size. Support for YCBCR 4:4:4 in Deep Color modes is
indicated with the DC_Y444 bit. If DC_Y444 is set, then YCBCR 4:4:4
is supported for all modes indicated by the DC_XXbit flags.
So if we have YUV444 support and any DC_XXbit flag set but the DC_Y444
flag isn't, we'll assume that we support that deep colour mode for
YUV444 which breaks the specification.
In order to fix this, let's split the edid_hdmi_dc_modes field in struct
drm_display_info into two fields, one for RGB444 and one for YUV444.
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Fixes: d0c94692e0a3 ("drm/edid: Parse and handle HDMI deep color modes.")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220120151625.594595-4-maxime@cerno.tech
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_connector.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index b501d0badaea..eaf0ef5f1843 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -592,10 +592,16 @@ struct drm_display_info { bool rgb_quant_range_selectable; /** - * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even - * more stuff redundant with @bus_formats. + * @edid_hdmi_dc_rgb444_modes: Mask of supported hdmi deep color modes + * in RGB 4:4:4. Even more stuff redundant with @bus_formats. */ - u8 edid_hdmi_dc_modes; + u8 edid_hdmi_rgb444_dc_modes; + + /** + * @edid_hdmi_dc_ycbcr444_modes: Mask of supported hdmi deep color + * modes in YCbCr 4:4:4. Even more stuff redundant with @bus_formats. + */ + u8 edid_hdmi_ycbcr444_dc_modes; /** * @cea_rev: CEA revision of the HDMI sink. |