From: jsg <jsg@openbsd.org>
Date: Fri, 11 Oct 2024 02:54:38 +0000 (+0000)
Subject: drm/amd/display: Add HDR workaround for specific eDP
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=1a3c1167ddc8d22b25bb9141bcc14fb9a8dba32f;p=openbsd

drm/amd/display: Add HDR workaround for specific eDP

From Alex Hung
487f6450bcb920ba1d58954c9e1ab969533b5da8 in linux-6.6.y/6.6.55
05af800704ee7187d9edd461ec90f3679b1c4aba in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index a74f6e9489e..0c871c9338c 100644
--- a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6157,12 +6157,21 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 	if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT ||
 	    stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
 	    stream->signal == SIGNAL_TYPE_EDP) {
+		const struct dc_edid_caps *edid_caps;
+		unsigned int disable_colorimetry = 0;
+
+		if (aconnector->dc_sink) {
+			edid_caps = &aconnector->dc_sink->edid_caps;
+			disable_colorimetry = edid_caps->panel_patch.disable_colorimetry;
+		}
+
 		//
 		// should decide stream support vsc sdp colorimetry capability
 		// before building vsc info packet
 		//
 		stream->use_vsc_sdp_for_colorimetry = stream->link->dpcd_caps.dpcd_rev.raw >= 0x14 &&
-						      stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED;
+						      stream->link->dpcd_caps.dprx_feature.bits.VSC_SDP_COLORIMETRY_SUPPORTED &&
+						      !disable_colorimetry;
 
 		if (stream->out_transfer_func->tf == TRANSFER_FUNCTION_GAMMA22)
 			tf = TRANSFER_FUNC_GAMMA_22;
diff --git a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index 05bcc928713..23a0bc96a52 100644
--- a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -71,6 +71,10 @@ static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
 		DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id);
 		edid_caps->panel_patch.remove_sink_ext_caps = true;
 		break;
+	case drm_edid_encode_panel_id('S', 'D', 'C', 0x4154):
+		DRM_DEBUG_DRIVER("Disabling VSC on monitor with panel id %X\n", panel_id);
+		edid_caps->panel_patch.disable_colorimetry = true;
+		break;
 	default:
 		return;
 	}
diff --git a/sys/dev/pci/drm/amd/display/dc/dc_types.h b/sys/dev/pci/drm/amd/display/dc/dc_types.h
index cc173ecf78e..6eaa02a8034 100644
--- a/sys/dev/pci/drm/amd/display/dc/dc_types.h
+++ b/sys/dev/pci/drm/amd/display/dc/dc_types.h
@@ -190,6 +190,7 @@ struct dc_panel_patch {
 	unsigned int skip_avmute;
 	unsigned int mst_start_top_delay;
 	unsigned int remove_sink_ext_caps;
+	unsigned int disable_colorimetry;
 };
 
 struct dc_edid_caps {