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drm/amd/display: clear remote dc_sink when stop mst

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[Why]
Currently, we don't have code path to release remote dc_sink when unplug
MST hub from the system. After few times hotplug, we hit the limition of
maximum number of remote dc_sink and can't light up new connected monitor
anymore.

[How]
Releasing all remote dc_sink at dm_helpers_dp_mst_stop_top_mgr() was
removed by previous patch. Restore it.

Reviewed-by: Jerry Zuo <Jerry.Zuo@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wayne Lin
2022-02-10 18:38:26 +08:00
committed by Alex Deucher
parent 9ff28ab43a
commit dfd9be4234
1 changed files with 19 additions and 1 deletions
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20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
View File

@@ -451,6 +451,7 @@ bool dm_helpers_dp_mst_stop_top_mgr(
struct dc_link *link)
{
struct amdgpu_dm_connector *aconnector = link->priv;
uint8_t i;
if (!aconnector) {
DRM_ERROR("Failed to find connector for link!");
@@ -460,9 +461,26 @@ bool dm_helpers_dp_mst_stop_top_mgr(
DRM_INFO("DM_MST: stopping TM on aconnector: %p [id: %d]\n",
aconnector, aconnector->base.base.id);
if (aconnector->mst_mgr.mst_state == true)
if (aconnector->mst_mgr.mst_state == true) {
drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, false);
for (i = 0; i < MAX_SINKS_PER_LINK; i++) {
if (link->remote_sinks[i] == NULL)
continue;
if (link->remote_sinks[i]->sink_signal ==
SIGNAL_TYPE_DISPLAY_PORT_MST) {
dc_link_remove_remote_sink(link, link->remote_sinks[i]);
if (aconnector->dc_sink) {
dc_sink_release(aconnector->dc_sink);
aconnector->dc_sink = NULL;
aconnector->dc_link->cur_link_settings.lane_count = 0;
}
}
}
}
return false;
}