[PATCH v2 18/21] drm/amd/display: Fallback to 2020_YCBCR if the pixel encoding is not RGB

[Harry Wentland]

From: Joshua Ashton <jos...@froggi.es>

Userspace might not aware whether we're sending RGB or YCbCr
data to the display. If COLOR_SPACE_2020_RGB_FULLRANGE is
requested but the output encoding is YCbCr we should
send COLOR_SPACE_2020_YCBCR.

Signed-off-by: Joshua Ashton <jos...@froggi.es>
Signed-off-by: Harry Wentland <harry.wentl...@amd.com>
Cc: Pekka Paalanen <ppaala...@gmail.com>
Cc: Sebastian Wick <sebastian.w...@redhat.com>
Cc: vitaly.pros...@amd.com
Cc: Joshua Ashton <jos...@froggi.es>
Cc: dri-de...@lists.freedesktop.org
Cc: amd-gfx@lists.freedesktop.org
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index f74b125af31f..16940ea61b59 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5184,7 +5184,10 @@ get_output_color_space(const struct dc_crtc_timing 
*dc_crtc_timing,
                color_space = COLOR_SPACE_ADOBERGB;
                break;
        case DRM_MODE_COLORIMETRY_BT2020_RGB:
-               color_space = COLOR_SPACE_2020_RGB_FULLRANGE;
+               if (dc_crtc_timing->pixel_encoding == PIXEL_ENCODING_RGB)
+                       color_space = COLOR_SPACE_2020_RGB_FULLRANGE;
+               else
+                       color_space = COLOR_SPACE_2020_YCBCR;
                break;
        case DRM_MODE_COLORIMETRY_BT2020_YCC:
                color_space = COLOR_SPACE_2020_YCBCR;
-- 
2.39.0