linux-kernel - Re: [PATCH v1 1/3] drm/msm/dpu: set dirty

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Message-ID: <CAD=FV=XV4yjUb2ufQZjOTYsgFXE0Ghnor3f8FCSdpV_pcZd1yg@mail.gmail.com>
Date:   Tue, 4 Apr 2023 18:43:21 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Vinod Polimera <quic_vpolimer@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, robdclark@...il.com,
        swboyd@...omium.org, quic_kalyant@...cinc.com,
        dmitry.baryshkov@...aro.org, quic_khsieh@...cinc.com,
        quic_vproddut@...cinc.com, quic_bjorande@...cinc.com,
        quic_abhinavk@...cinc.com, quic_sbillaka@...cinc.com
Subject: Re: [PATCH v1 1/3] drm/msm/dpu: set dirty_fb flag while in self
 refresh mode

Hi,

On Fri, Mar 31, 2023 at 6:59 AM Vinod Polimera
<quic_vpolimer@...cinc.com> wrote:
>
> While in virtual terminal mode with PSR enabled, there will be
> no atomic commits triggered without dirty_fb being set. This
> will create a notion of no screen update. Allow atomic commit
> when dirty_fb ioctl is issued, so that it can trigger a PSR exit
> and shows update on the screen.
>
> Reported-by: Bjorn Andersson <andersson@...nel.org>
> Link: https://lore.kernel.org/all/20230326162723.3lo6pnsfdwzsvbhj@ripper/
> Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 3 +++
>  1 file changed, 3 insertions(+)

I can confirm that this patch plus patch #2 fixes the typing problems
seen on VT2 on a Chromebook using PSR.

Tested-by: Douglas Anderson <dianders@...omium.org>


-Doug