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drm/amd/display: Release AUX engine after failed acquire
authorWyatt Wood <wyatt.wood@amd.com>
Wed, 23 Feb 2022 16:22:30 +0000 (11:22 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Tue, 15 Mar 2022 18:25:15 +0000 (14:25 -0400)
commitd8ff38d8fcd0a7bb66d17ec689135239aca78532
tree0cfbd8bcbd21bea10b111ef8a62ff24ef48af933
parent3741584519dcb780c38df502dd5e4cf7cea4d9f2
drm/amd/display: Release AUX engine after failed acquire

[Why]
There is a sequence in which aux arbitration
doesn't work correctly. Driver is left with
aux access after it times out waiting for access.
In future dmub fw is never granted aux access
and is stuck in a while loop.

[How]
Cancel aux request from driver after timing out.

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drivers/gpu/drm/amd/display/dc/dce/dce_aux.c