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| author | Wayne Lin <Wayne.Lin@amd.com> | 2022-04-12 21:18:00 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-06-21 18:17:23 -0400 |
| commit | 84a8b3908285d007db49532fd4b51d4b183d1242 (patch) | |
| tree | f9d98a19d890e81746d436c41f0c4564ebf80904 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | 052eaf6af846e59073a842e9b9517ba9d3f76d4a (diff) | |
| download | lwn-84a8b3908285d007db49532fd4b51d4b183d1242.tar.gz lwn-84a8b3908285d007db49532fd4b51d4b183d1242.zip | |
drm/amd/display: Release remote dc_sink under mst scenario
[Why]
Observe that we have several problems while releasing remote dc_sink
under mst cases.
- When unplug mst branch device from the source, we now try to free all
remote dc_sinks in dm_helpers_dp_mst_stop_top_mgr(). However, there are
bugs while we're releasing dc_sinks here. First of all,
link->remote_sinks[] array get shuffled within
dc_link_remove_remote_sink(). As the result, increasing the array index
within the releasing loop is wrong. Secondly, it tries to call
dc_sink_release() to release the dc_sink of the same aconnector every
time in the loop. Which can't release dc_sink of all aconnector in the
mst topology.
- There is no code path for us to release remote dc_sink for disconnected
sst monitor which unplug event is notified by CSN sideband message. Which
means we'll use stale dc_sink data to represent later on connected
monitor. Also, has chance to break the maximum remote dc_sink number
constraint.
[How]
Distinguish unplug event of mst scenario into 2 cases.
* Unplug sst/legacy stream sink off the mst topology
- Release related remote dc_sink in detec_ctx().
* Unplug mst branch device off the mst topology
- Release related remote dc_sink in early_unregister()
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Aurabindo Jayamohanan Pillai <Aurabindo.Pillai@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 986aeaf78ac0..9039c2fbabe2 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2201,7 +2201,8 @@ static void s3_handle_mst(struct drm_device *dev, bool suspend) } else { ret = drm_dp_mst_topology_mgr_resume(mgr, true); if (ret < 0) { - drm_dp_mst_topology_mgr_set_mst(mgr, false); + dm_helpers_dp_mst_stop_top_mgr(aconnector->dc_link->ctx, + aconnector->dc_link); need_hotplug = true; } } @@ -10606,7 +10607,7 @@ static int dm_update_crtc_state(struct amdgpu_display_manager *dm, * added MST connectors not found in existing crtc_state in the chained mode * TODO: need to dig out the root cause of that */ - if (!aconnector || (!aconnector->dc_sink && aconnector->mst_port)) + if (!aconnector) goto skip_modeset; if (modereset_required(new_crtc_state)) |