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linux/drivers/gpu/drm/amd/display/modules/hdcp
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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
..
hdcp1_execution.c drm/amd/display: remove unused functions 2021-07-28 16:37:17 -04:00
hdcp1_transition.c drm/amd/display: add authentication_complete in hdcp output 2021-08-09 15:43:33 -04:00
hdcp2_execution.c drm/amd/display: remove unused functions 2021-07-28 16:37:17 -04:00
hdcp2_transition.c drm/amd/display: add authentication_complete in hdcp output 2021-08-09 15:43:33 -04:00
hdcp_ddc.c drm/amd/display: Fix CP_IRQ clear bit and logic 2020-09-15 17:52:40 -04:00
hdcp_log.c drm/amd/display: add authentication_complete in hdcp output 2021-08-09 15:43:33 -04:00
hdcp_log.h drm/amd/display: add authentication_complete in hdcp output 2021-08-09 15:43:33 -04:00
hdcp_psp.c drm/amd/display: Fix deadlock when falling back to v2 from v3 2021-10-27 22:04:50 -04:00
hdcp_psp.h drm/amdgpu/display: fold DRM_AMD_DC_DCN3_1 into DRM_AMD_DC_DCN 2021-06-22 16:51:45 -04:00
hdcp.c drm/amd/display: add authentication_complete in hdcp output 2021-08-09 15:43:33 -04:00
hdcp.h drm/amd/display: add authentication_complete in hdcp output 2021-08-09 15:43:33 -04:00
Makefile