Public bug reported:
[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(-)
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1868640 sutton
** Tags added: oem-priority originate-from-1868640 sutton
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https://bugs.launchpad.net/bugs/1886785
Title:
[SRU][PATCH 0/1][oem-5.6] fix amd RENOIR screen backlight issue.
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