linux/drivers/gpu/drm/amd
Nicholas Kazlauskas ad76744b04 drm/amd/display: Fix deadlock when falling back to v2 from v3
[Why]
A deadlock in the kernel occurs when we fallback from the V3 to V2
add_topology_to_display or remove_topology_to_display because they
both try to acquire the dtm_mutex but recursive locking isn't
supported on mutex_lock().

[How]
Make the mutex_lock/unlock more fine grained and move them up such that
they're only required for the psp invocation itself.

Fixes: bf62221e9d ("drm/amd/display: Add DCN3.1 HDCP support")

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2021-10-27 22:04:50 -04:00
..
acp
amdgpu drm/amdgpu: support B0&B1 external revision id for yellow carp 2021-10-20 15:27:31 -04:00
amdkfd drm/amdkfd: remove redundant iommu cleanup code 2021-10-05 13:02:13 -04:00
display drm/amd/display: Fix deadlock when falling back to v2 from v3 2021-10-27 22:04:50 -04:00
include drm/amd/display: Fix B0 USB-C DP Alt mode 2021-10-05 10:17:32 -04:00
pm drm/amd/pm: Update intermediate power state for SI 2021-09-23 17:06:11 -04:00