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

Aaron Ma aaron.ma at canonical.com
Wed Jul 8 08:42:03 UTC 2020

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

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

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

Verified on hardware, after 10 times of S3, backlight can be changed by

[Regression Potential]
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(-)


More information about the kernel-team mailing list