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Commit fe61a2f1 authored by Mikita Lipski's avatar Mikita Lipski Committed by Alex Deucher
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drm/amd/display: adding ycbcr420 pixel encoding for hdmi 



[why]
HDMI EDID's VSDB contains spectial timings for specifically
YCbCr 4:2:0 colour space. In those cases we need to verify
if the mode provided is one of the special ones has to use
YCbCr 4:2:0 pixel encoding for display info.
[how]
Verify if the mode is using specific ycbcr420 colour space with
the help of DRM helper function and assign the mode to use
ycbcr420 pixel encoding.

Signed-off-by: default avatarMikita Lipski <mikita.lipski@amd.com>
Tested-by: default avatarMike Lothian <mike@fireburn.co.uk>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 87e3f136

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+5 −2
Original line number Diff line number Diff line
@@ -2184,6 +2184,7 @@ fill_stream_properties_from_drm_display_mode(struct dc_stream_state *stream, 
					     const struct drm_connector *connector)

{

	struct dc_crtc_timing *timing_out = &stream->timing;

	const struct drm_display_info *info = &connector->display_info;



	memset(timing_out, 0, sizeof(struct dc_crtc_timing));
@@ -2192,8 +2193,10 @@ fill_stream_properties_from_drm_display_mode(struct dc_stream_state *stream, 
	timing_out->v_border_top = 0;

	timing_out->v_border_bottom = 0;

	/* TODO: un-hardcode */



	if ((connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444)

	if (drm_mode_is_420_only(info, mode_in)

			&& stream->sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A)

		timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;

	else if ((connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444)

			&& stream->sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A)

		timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR444;

	else