linux-kernel - Re: [PATCH v12 09/14] drm/msm/dp: disable self_refresh

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Date:   Tue, 31 Jan 2023 14:48:52 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Vinod Polimera <quic_vpolimer@...cinc.com>,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        linux-kernel@...r.kernel.org, robdclark@...il.com,
        dianders@...omium.org, swboyd@...omium.org,
        quic_kalyant@...cinc.com, quic_khsieh@...cinc.com,
        quic_vproddut@...cinc.com, quic_bjorande@...cinc.com,
        quic_abhinavk@...cinc.com
Subject: Re: [PATCH v12 09/14] drm/msm/dp: disable self_refresh_aware after
 entering psr

On 30/01/2023 17:11, Vinod Polimera wrote:
> From: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
> 
> Updated frames get queued if self_refresh_aware is set when the
> sink is in psr. To support bridge enable and avoid queuing of update
> frames, reset the self_refresh_aware state after entering psr.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
> Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_drm.c | 25 ++++++++++++++++++++++++-
>   1 file changed, 24 insertions(+), 1 deletion(-)

As I stated in v11's discussion, I do not like the way this change plays 
with the self_refresh_aware. Please find another way to work around the 
timing issue (let's probably continue the discussion back in v11).

-- 
With best wishes
Dmitry