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Commit e4ba6335 authored by Wenjing Liu's avatar Wenjing Liu Committed by Alex Deucher
Browse files

drm/amd/display: update link type to mst before topology discovery 



[Description]
link type is not updated before mst topology discovery.
This causes issue when branch device response to link address after before
the start topology discovery event finishes.

[Solution]
update link type to mst before topology discovery

Signed-off-by: default avatarWenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent fcbbe3da

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

+3 −3
Original line number Diff line number Diff line
@@ -496,6 +496,7 @@ static void detect_dp( 
		}

		if (is_mst_supported(link)) {

			sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT_MST;

			link->type = dc_connection_mst_branch;



			/*

			 * This call will initiate MST topology discovery. Which
@@ -524,12 +525,11 @@ static void detect_dp( 
			if (reason == DETECT_REASON_BOOT)

				boot = true;



			if (dm_helpers_dp_mst_start_top_mgr(

			if (!dm_helpers_dp_mst_start_top_mgr(

				link->ctx,

				link, boot)) {

				link->type = dc_connection_mst_branch;

			} else {

				/* MST not supported */

				link->type = dc_connection_single;

				sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT;

			}

		}