[PATCH 11/15] drm/amd/display: Set up pixel encoding for YCBCR422

[Ray Wu]

From: Mario Limonciello <mario.limoncie...@amd.com>

[Why]
fill_stream_properties_from_drm_display_mode() will not configure pixel
encoding to YCBCR422 when the DRM color format supports YCBCR422 but not
YCBCR420 or YCBCR4444.  Instead it will fallback to RGB.

[How]
Add support for YCBCR422 in pixel encoding mapping.

Suggested-by: Mauri Carvalho <mcarval...@lenovo.com>
Reviewed-by: Wayne Lin <wayne....@amd.com>
Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com>
Signed-off-by: Ray Wu <ray...@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
 1 file changed, 3 insertions(+)

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 849c45d10ad6..1f9c56c288b2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6405,6 +6405,9 @@ static void fill_stream_properties_from_drm_display_mode(
                        && aconnector
                        && aconnector->force_yuv420_output)
                timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;
+       else if ((connector->display_info.color_formats & 
DRM_COLOR_FORMAT_YCBCR422)
+                       && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
+               timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR422;
        else if ((connector->display_info.color_formats & 
DRM_COLOR_FORMAT_YCBCR444)
                        && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
                timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR444;
-- 
2.43.0