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

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Am Do., 1. Aug. 2024 um 14:34 Uhr schrieb Jani Nikula
<jani.nikula@xxxxxxxxxxxxxxx>:
>
> On Mon, 01 Jul 2024, Xaver Hugl <xaver.hugl@xxxxxxxxx> wrote:
> > Am Do., 20. Juni 2024 um 22:22 Uhr schrieb Xaver Hugl <xaver.hugl@xxxxxxxxx>:
> >> 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?

I've talked about the property with other KWin developers before, but
there's indeed no official review for the MR yet.
As some new discussions about alternative approaches have started as
well, maybe it should be reverted until we're more certain about how
to proceed?

> 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



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