drm/amd/display: Restore backlight brightness after system resume

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Laptops with AMD APU doesn't restore display backlight brightness after
system resume.

This issue started when DC was introduced.

Let's use BL_CORE_SUSPENDRESUME so the backlight core calls
update_status callback after system resume to restore the backlight
level.

Tested on Dell Inspiron 3180 (Stoney Ridge) and Dell Latitude 5495
(Raven Ridge).

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Kai-Heng Feng 2019-09-02 16:33:42 +08:00 • committed by Alex Deucher

parent a142ba8800

commit c7c5be3c89

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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