** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Incomplete
** Also affects: linux-oem-osp1 (Ubuntu Focal)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Bionic)
** No longer affects: linux-oem-osp1 (Ubuntu Focal)
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https://bugs.launchpad.net/bugs/1856134
Title:
Support DPCD aux brightness control
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem-osp1 package in Ubuntu:
New
Status in linux-oem-osp1 source package in Bionic:
In Progress
Status in linux source package in Focal:
Incomplete
Bug description:
[Impact]
A new Dell platform using DPCD aux to adjust the brightness, we need to
backport some patches which are still under discussing.
[Fix]
Here is the patchset we need.
https://patchwork.freedesktop.org/series/69914/
[Test]
Verified on new Dell platform which use DPCD aux to adjust brightness and
also others which using pwm to adjust brightness, no regression found.
[Regression Potential]
Low, the new DPCD method only taken effect on the platforms which are listed
in the quirk.
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