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drm/amd/display: Program VSC SDP colorimetry for all DP sinks >= 1.4 

In order for display colorimetry to work correctly on DP displays
we need to send the VSC SDP packet. We should only do so for
panels with DPCD revision greater or equal to 1.4 as older
receivers might have problems with it.

Cc: stable@vger.kernel.org
Cc: Joshua Ashton <joshua@froggi.es>
Cc: Xaver Hugl <xaver.hugl@gmail.com>
Cc: Melissa Wen <mwen@igalia.com>
Cc: Agustin Gutierrez <Agustin.Gutierrez@amd.com>
Reviewed-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2024-03-12 11:55:52 -04:00 committed by Alex Deucher
parent cf79814cb0
commit 9e61ef8d21
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -6318,7 +6318,9 @@ create_stream_for_sink(struct drm_connector *connector,
if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
mod_build_hf_vsif_infopacket(stream, &stream->vsp_infopacket);
if (stream->link->psr_settings.psr_feature_enabled || stream->link->replay_settings.replay_feature_enabled) {
if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT ||
stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
stream->signal == SIGNAL_TYPE_EDP) {
//
// should decide stream support vsc sdp colorimetry capability
// before building vsc info packet
@ -6328,7 +6330,8 @@ create_stream_for_sink(struct drm_connector *connector,
stream->use_vsc_sdp_for_colorimetry =
aconnector->dc_sink->is_vsc_sdp_colorimetry_supported;
} else {
if (stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED)
if (stream->link->dpcd_caps.dpcd_rev.raw >= 0x14 &&
stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED)
stream->use_vsc_sdp_for_colorimetry = true;
}
if (stream->out_transfer_func->tf == TRANSFER_FUNCTION_GAMMA22)