[SRU][PATCH 0/1][oem-5.6] fix amd RENOIR screen backlight issue.

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1886785

[Impact]
On AMD RENOIR gpu, after S3 backlight brightness can not be changed.

[Fix]
Pevious patch prevent loading iram, then dmcu can not work.
Remove unused check to load iram right. Then backlight works well.

[Test]
Verified on hardware, after 10 times of S3, backlight can be changed by
hotkey.

[Regression Potential]
Low
Upstream fix, backports is minimal.
RENOIR is only supported on oem-5.6, no focal patch.

Harry Wentland (1):
  Revert "drm/amd/display: disable dcn20 abm feature for bring up"

 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

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2.25.1