drm/amd/display: Move verify link cap after read edid

DP link layer test 400.1.1 fails intermittently.
The test device will pull hpd low immediately
after verify link cap.
Driver reads edid when hpd low that causes the test to fail.

Move read edid before verify link cap, so driver will
read edid before starting link training

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -666,6 +666,22 @@ bool dc_link_detect(struct dc_link *link, bool boot)
 			break;
 		}
 
+		if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
+			sink_caps.transaction_type ==
+			DDC_TRANSACTION_TYPE_I2C_OVER_AUX) {
+			/*
+			 * TODO debug why Dell 2413 doesn't like
+			 *  two link trainings
+			 */
+			if (is_mst_supported(link)) {
+				link->verified_link_cap =
+						link->reported_link_cap;
+			} else {
+				dp_hbr_verify_link_cap(link,
+				    &link->reported_link_cap);
+			}
+		}
+
 		/* HDMI-DVI Dongle */
 		if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A &&
 				!sink->edid_caps.edid_hdmi)

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

@@ -2283,13 +2283,6 @@ void detect_dp_sink_caps(struct dc_link *link)
 	 * DP, hw_init may need check signal or power up
 	 * encoder here.
 	 */
-
-	if (is_mst_supported(link)) {
-		link->verified_link_cap = link->reported_link_cap;
-	} else {
-		dp_hbr_verify_link_cap(link,
-			&link->reported_link_cap);
-	}
 	/* TODO save sink caps in link->sink */
 }