From: Anthony Koo <Anthony.Koo@amd.com>
Date: Tue, 8 May 2018 17:08:57 -0400
Subject: drm/amd/display: add DPCD read for Sink ieee OUI
Git-commit: 8ca809008571f87e7d73535175601328175dac81
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2303,6 +2303,7 @@ static bool retrieve_link_cap(struct dc_
 {
 	uint8_t dpcd_data[DP_ADAPTER_CAP - DP_DPCD_REV + 1];
 
+	struct dp_device_vendor_id sink_id;
 	union down_stream_port_count down_strm_port_count;
 	union edp_configuration_cap edp_config_cap;
 	union dp_downstream_port_present ds_port = { 0 };
@@ -2389,6 +2390,17 @@ static bool retrieve_link_cap(struct dc_
 			&link->dpcd_caps.sink_count.raw,
 			sizeof(link->dpcd_caps.sink_count.raw));
 
+	/* read sink ieee oui */
+	core_link_read_dpcd(link,
+			DP_SINK_OUI,
+			(uint8_t *)(&sink_id),
+			sizeof(sink_id));
+
+	link->dpcd_caps.sink_dev_id =
+			(sink_id.ieee_oui[0] << 16) +
+			(sink_id.ieee_oui[1] << 8) +
+			(sink_id.ieee_oui[2]);
+
 	/* Connectivity log: detection */
 	CONN_DATA_DETECT(link, dpcd_data, sizeof(dpcd_data), "Rx Caps: ");