[PATCH v3 2/2] drm/amd: Add power_saving_policy drm property to eDP connectors

[Xaver Hugl]

Am Do., 20. Juni 2024 um 22:22 Uhr schrieb Xaver Hugl <xaver.hugl at gmail.com>:
> Merging can only happen once a real world userspace application has
> implemented support for it. I'll try to do that sometime next week in
> KWin

Here's the promised implementation:
https://invent.kde.org/plasma/kwin/-/merge_requests/6028

In testing with the patches on top of kernel 6.9.6, setting the
property to `Require color accuracy` makes the sysfs file correctly
report "Device or resource busy" when trying to change the power
saving level, but setting the property to zero doesn't really work.
Once KWin sets the property to zero, changing the power saving level
"works" but the screen blanks for a moment (might just be a single
frame) and reading from the file returns zero again, with the visuals
and backlight level unchanged as well.