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

[Harry Wentland]

From: Joshua Ashton <joshua at 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 <joshua at froggi.es>
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
Cc: Pekka Paalanen <ppaalanen at gmail.com>
Cc: Sebastian Wick <sebastian.wick at redhat.com>
Cc: Vitaly.Prosyak at amd.com
Cc: Joshua Ashton <joshua at froggi.es>
Cc: dri-devel at lists.freedesktop.org
Cc: amd-gfx at lists.freedesktop.org
Reviewed-by: Harry Wentland <harry.wentland at 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