[PATCH 11/28] drm/amd/display: Program VSC SDP colorimetry for all DP sinks >= 1.4

[Hamza Mahfooz]

From: Harry Wentland <harry.wentland at amd.com>

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 at vger.kernel.org
Cc: Joshua Ashton <joshua at froggi.es>
Cc: Xaver Hugl <xaver.hugl at gmail.com>
Cc: Melissa Wen <mwen at igalia.com>
Cc: Agustin Gutierrez <Agustin.Gutierrez at amd.com>
Reviewed-by: Agustin Gutierrez <agustin.gutierrez at amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz at amd.com>
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

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 9220acbdf981..56779e6544b0 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6326,7 +6326,9 @@ 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
@@ -6336,7 +6338,8 @@ 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)
-- 
2.44.0