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

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Date:   Mon, 26 Sep 2022 18:29:19 -0400
From:   Leo Li <sunpeng.li@....com>
To:     August Wikerfors <git@...ustwikerfors.se>,
        Alex Deucher <alexdeucher@...il.com>
Cc:     Thorsten Leemhuis <regressions@...mhuis.info>,
        Harry Wentland <harry.wentland@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        regressions@...ts.linux.dev
Subject: Re: [REGRESSION] Graphical issues on Lenovo Yoga 7 14ARB7 laptop
 since v6.0-rc1 (bisected)


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

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**

Thanks,
Leo

On 2022-09-23 16:26, August Wikerfors wrote:
> Hi Leo,
> 
> On 2022-09-23 20:41, Leo Li wrote:
>> Hi August,
>>
>> Can you provide a dmesg log with drm.debug=0x16 enabled in kernel 
>> cmdline?
> Log is available here: 
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Ffiles.augustwikerfors.se%2Fdmesg.2022-09-23.txt&amp;data=05%7C01%7Csunpeng.li%40amd.com%7C261d31a0ac6844e40b2208da9da1ee82%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637995616061782958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=6LAMah8N%2FdEG6gl6u9HGcajwozrS7fwp%2FJDLZMKpcGU%3D&amp;reserved=0
> 
> This is what I did during that log:
> 1. Boot the system
> 2. Type into the password field in SDDM (this is when the problem occurs)
> 3. Switch to a TTY to save the log (the problem doesn't happen there)
> 
> Regards,
> August Wikerfors