drm/amd/display: Fix race condition when turning off an output alone

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[Why]
When 2 threads are doing commit_tail parallelly, one thread could
commit new streams to dc state but another thread remove it from dc
right away.

[How]
If we don't have new dm state change from commit_check, then we should
not call dc_commit_streams() in commit_tail. A new function
amdgpu_dm_commit_streams() is introduced to refator dc_commit_stream()
adjacent code and fix this issue.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alan Liu <haoping.liu@amd.com>
Signed-off-by: Alan Liu <haoping.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alan Liu 2023-06-27 12:21:51 +08:00 • committed by Alex Deucher

parent c4ba2b50f2

commit fff7b95a50

1 changed files with 55 additions and 59 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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