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

[Jani Nikula <jani.nikula@linux.intel.com>]

On Mon, 01 Jul 2024, Xaver Hugl <xaver.hugl@gmail.com> wrote:
> Am Do., 20. Juni 2024 um 22:22 Uhr schrieb Xaver Hugl <xaver.hugl@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

The requirement is that the userspace patches must be reviewed and ready
for merging into a suitable and canonical upstream project.

Are they?


BR,
Jani.


>
> 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.

-- 
Jani Nikula, Intel