Commit b6500759 authored by Bing Guo's avatar Bing Guo Committed by Alex Deucher
Browse files

drm/amdgpu/display/dc: do blocked MST topology discovery at resume from S3/S4 



Why:
When resume from sleep or hiberation, blocked MST Topology discovery might
need to be used.

How:
Added "DETECT_REASON_RESUMEFROMS3S4" to enum dc_detect_reason; use it to
require blocked MST Topology discovery.

Reviewed-by: default avatarWenjing Liu <Wenjing.Liu@amd.com>
Acked-by: default avatarJasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: default avatarBing Guo <Bing.Guo@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 77a35bb5

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

+1 −1
Original line number Diff line number Diff line
@@ -831,7 +831,7 @@ static bool discover_dp_mst_topology(struct dc_link *link, enum dc_detect_reason 
	link->type = dc_connection_mst_branch;

	dm_helpers_dp_update_branch_info(link->ctx, link);

	if (dm_helpers_dp_mst_start_top_mgr(link->ctx,

			link, reason == DETECT_REASON_BOOT)) {

			link, (reason == DETECT_REASON_BOOT || reason == DETECT_REASON_RESUMEFROMS3S4))) {

		link_disconnect_sink(link);

	} else {

		link->type = dc_connection_sst_branch;

drivers/gpu/drm/amd/display/dc/dc_link.h

+1 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ void dc_link_blank_dp_stream(struct dc_link *link, bool hw_init); 
 */

enum dc_detect_reason {

	DETECT_REASON_BOOT,

	DETECT_REASON_RESUMEFROMS3S4,

	DETECT_REASON_HPD,

	DETECT_REASON_HPDRX,

	DETECT_REASON_FALLBACK,