drm/amd/display: Fix exception from AUX acquire failure

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[Why]
AUX arbitration occurs between SW and FW components.
When AUX acquire fails, it causes engine->ddc to be NULL,
which leads to an exception when we try to release the AUX
engine.

[How]
When AUX engine acquire fails, it should return from the
function without trying to continue the operation.
The upper level will determine if it wants to retry.
i.e. dce_aux_transfer_with_retries will be used and retry.

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Anthony Koo 2019-02-06 11:45:42 -05:00 • committed by Alex Deucher

parent 4bc46da4a3

commit dcf1a98867

1 changed files with 2 additions and 2 deletions

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drivers/gpu/drm/amd/display/dc/dce/dce_aux.c

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