linux-kernel - Re: [PATCH] Revert "drm/msm/dp: set self refresh aware based on PSR support"

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Date:   Mon, 5 Jun 2023 13:05:36 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Bjorn Andersson <andersson@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Vinod Polimera <quic_vpolimer@...cinc.com>,
        regressions@...ts.linux.dev
Subject: Re: [PATCH] Revert "drm/msm/dp: set self refresh aware based on PSR support"

On Mon, 5 Jun 2023 at 13:02, Johan Hovold <johan@...nel.org> wrote:
>
> [ +CC: Thorsten and regzbot so they can help with tracking this
> regression ]
>
> #regzbot introduced: v6.3..v6.4-rc1
>
> On Tue, May 23, 2023 at 05:16:46PM +0200, Johan Hovold wrote:
> > This reverts commit 1844e680d56bb0c4e0489138f2b7ba2dc1c988e3.
> >
> > PSR support clearly is not ready for mainline and specifically breaks
> > virtual terminals which are no longer updated when PSR is enabled (e.g.
> > no keyboard input is echoed, no cursor blink).
> >
> > Disable PSR support for now by reverting commit 1844e680d56b
> > ("drm/msm/dp: set self refresh aware based on PSR support").
> >
> > Cc: Vinod Polimera <quic_vpolimer@...cinc.com>
> > Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> > ---
> >
> > Bjorn reported that PSR support broke virtual terminals two months ago,
> > but this is still broken in 6.4-rc3:
> >
> >       https://lore.kernel.org/lkml/20230326162723.3lo6pnsfdwzsvbhj@ripper/
> >
> > despite the following series that claimed to address this:
> >
> >       https://lore.kernel.org/lkml/1680271114-1534-1-git-send-email-quic_vpolimer@quicinc.com
> >
> > Let's revert until this has been fixed properly.
>
> Virtual terminals are still broken with 6.4-rc5 on the Lenovo ThinkPad
> X13s two weeks after I reported this, and there has been no indication
> of any progress in the other related thread:
>
>         https://lore.kernel.org/lkml/ZHYPHnWoDbXB-fqe@hovoldconsulting.com
>
> Seems like it is time to merge this revert to get this sorted.
>
> Rob, Abhinav, Dmitry, can either of you merge this one and get it into
> 6.4-rc6?

Rob sent the pull request few hours ago, see
https://lore.kernel.org/dri-devel/CAF6AEGuHujkFjRa6ys36Uyh0KUr4Hd16u1EMqJo8tOZ3ifVubQ@mail.gmail.com/

-- 
With best wishes
Dmitry