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

[Mario Limonciello]

On 7/1/2024 13:47, Xaver Hugl wrote:
> 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

Thanks!

> 
> 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.

Hmm I'm a bit surprised the IGT tests I did didn't catch this.

Are you working on a system with two GPUs by chance (like a Framework 
16)?  If so; can you try the "other GPU"?

As it seems your PR to span 3 projects and I've never built KDE before 
can you spit out some artifacts somewhere that I can have a play with to 
reproduce your result and find the kernel issue?  Arch pkgs would be 
preferable for me, but some RPMs or DEBs are fine too.