drm/amd/display: Avoid NULL pointer in set_backlight when ABM is NULL

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[Why]
On ASIC without ABM support (most dGPU) we run into a null pointer
dereference when attempting to set the backlight level.

[How]
This function requires ABM, so fix up the condition to only allow
DMCU to be optional.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Wyatt Wood <Wyatt.Wood@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Nicholas Kazlauskas 2020-04-02 15:59:44 -04:00 • committed by Alex Deucher

parent 39063de95c

commit f1029e7ead

1 changed files with 1 additions and 2 deletions

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drivers/gpu/drm/amd/display/dc/core/dc_link.c

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