drm/amd/display: Change AUX NACK behavior

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[Why]
Retrying on receiving a NACK can result in long overall EDID read times
in some cases.

[How]
Retry only on DEFER and return immediately on NACK.

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Ilya Bakoulin 2022-08-04 13:44:51 -04:00 • committed by Alex Deucher

parent 9f92c20279

commit 95bbbb88ed

1 changed files with 5 additions and 7 deletions

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

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