Re: [REGRESSION] Graphical issues on Lenovo Yoga 7 14ARB7 laptop since v6.0-rc1 (bisected)

[August Wikerfors]

Hi Leo,

On 2022-09-27 00:29, Leo Li wrote:
> Hi August, thanks for the log.
>
> It seems the eDP panel does not fully satisfy the amdgpu requirements
> for enabling PSR SU, but we're enabling it anyways.
>
> I suspect it may be due to the "DP_FORCE_PSRSU_CAPABILITY" bit being set
> in it's DPCD registers, I'm checking with some devs to see if that is
> expected.
>
> In the meantime, can you give these two hacks a spin? Let me know if
> this helps with the glitches and system hangs:
> https://gitlab.freedesktop.org/-/snippets/7076
Yes, the issues do not happen with those patches applied.

> Also the dmesg, in particular this line:
> > [drm] PSR support 1, DC PSR ver 1, sink PSR ver 3 DPCD caps 
> > 0x70su_y_granularity 4 force_psrsu_cap **X**
Here is that line:
> [   12.085196] [drm] PSR support 1, DC PSR ver 1, sink PSR ver 3 DPCD caps 0x7b su_y_granularity 4 force_psrsu_cap 1

Regards,
August Wikerfors