linux-kernel - Re: [PATCH] Revert "drm/msm/dp: Remove INIT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <49d175ec16e3f65a18265063e51092ee8d0d79c1@lausen.nl>
Date:   Tue, 23 May 2023 02:39:50 +0000
From:   "Leonard Lausen" <leonard@...sen.nl>
To:     "Abhinav Kumar" <quic_abhinavk@...cinc.com>,
        "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>,
        "Bjorn Andersson" <andersson@...nel.org>
Cc:     regressions@...ts.linux.dev,
        "Bjorn Andersson" <quic_bjorande@...cinc.com>,
        "Rob Clark" <robdclark@...il.com>,
        "Stephen Boyd" <swboyd@...omium.org>,
        "Kuogee Hsieh" <quic_khsieh@...cinc.com>,
        "Johan Hovold" <johan+linaro@...nel.org>,
        "Sankeerth Billakanti" <quic_sbillaka@...cinc.com>,
        "Sean Paul" <sean@...rly.run>, "David Airlie" <airlied@...il.com>,
        "Daniel Vetter" <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, "Nikita Travkin" <nikita@...n.ru>
Subject: Re: [PATCH] Revert "drm/msm/dp: Remove INIT_SETUP delay"

Abhinav Kumar <quic_abhinavk@...cinc.com> writes:
>>>> There is no need to add the 100ms delay back yet.
>>>>
>>>> thanks for posting this but NAK on this patch till we post the fix this
>>>> week.
>>>>
>>>> Appreciate a bit of patience till then.
>>>
>>> This regression is already part of the 6.3 stable release series. Will
>>> the new patch qualify for inclusion in 6.3.y? Or will it be part of 6.4
>>> and this revert should go into 6.3.y?
>> 
>> This is a tough situation, as landing a revert will break x13s, as noted 
>> by Bjorn. Given that the workaround is known at this moment, I would 
>> like to wait for the patch from Abhinav to appear, then we can decide 
>> which of the fixes should go to the stable kernel.

I wasn't able to find new patches, though may have missed them. Is there
a decision yet how to proceed with this regression? 6.2 now being EOL
may make this a good moment to decide on the next steps.

>>> [  275.025497] [drm:dpu_encoder_phys_vid_wait_for_commit_done:488] 
>>> [dpu error]vblank timeout
>>> [  275.025514] [drm:dpu_kms_wait_for_commit_done:510] [dpu error]wait 
>>> for commit done returned -110
>>> [  275.064141] [drm:dpu_encoder_frame_done_timeout:2382] [dpu 
>>> error]enc33 frame done timeout
>
> This is a different crash but the root-cause of both the issues is the 
> bridge hpd_enable/disable series.
>
> https://patchwork.freedesktop.org/patch/514414/
>
> This is breaking the sequence and logic of internal hpd as per my 
> discussion with kuogee.
>
> We are analyzing the issue and the fix internally first and once we 
> figure out all the details will post it.

Thank you!