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

Browse Source 
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: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Bing Guo <Bing.Guo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bing Guo
2022-01-20 18:34:24 -05:00
committed by Alex Deucher
parent 77a35bb579
commit b650075909
2 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@@ -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;

1
drivers/gpu/drm/amd/display/dc/dc_link.h
View File

@@ -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,