drm/amd/display: VSC SDP supported for SST (7715fdf3) · Commits · 戴 / test

[why] If a typeC to HDMI dongle supports YCbCr420 pass through and VSC colorimetry and pixel encoding formats in the Extended Receiver Capability, we shall allow VSC SDP to be used. [How] The Extended Receiver Capability field shall check the EXTENDED_RECEIVER_CAPABILITY_FIELD_PRESENT bit in the TRAINING_AUX_RD_INTERVAL register. Removed DPCD rev checking for VSC SDP. Signed-off-by:

Derek Lai <Derek.Lai@amd.com> Reviewed-by:

Wenjing Liu <Wenjing.Liu@amd.com> Acked-by:

Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Acked-by:

Tony Cheng <Tony.Cheng@amd.com> Signed-off-by:

Alex Deucher <alexander.deucher@amd.com>

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

+1 −3

Original line number	Diff line number	Diff line
		@@ -4573,11 +4573,9 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
		stream->use_vsc_sdp_for_colorimetry =
		aconnector->dc_sink->is_vsc_sdp_colorimetry_supported;
		} else {
		if (stream->link->dpcd_caps.dpcd_rev.raw >= 0x14 &&
		stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED) {
		if (stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED)
		stream->use_vsc_sdp_for_colorimetry = true;
		}
		}
		mod_build_vsc_infopacket(stream, &stream->vsc_infopacket);
		}
		}

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3376,7 +3376,7 @@ static bool retrieve_link_cap(struct dc_link *link)
		link->dpcd_caps.dpcd_rev.raw =
		dpcd_data[DP_DPCD_REV - DP_DPCD_REV];

		if (link->dpcd_caps.dpcd_rev.raw >= 0x14) {
		if (link->dpcd_caps.ext_receiver_cap_field_present) {
		for (i = 0; i < read_dpcd_retry_cnt; i++) {
		status = core_link_read_dpcd(
		link,

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