linux-kernel - Re: [PATCH v15 11/13] drm/msm/dpu: support SSPP assignment for quad-pipe case

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Message-ID: <hrcp5pcjkqotexrnenm7dxojcmmzx2fl6ybxxofbtcot6q2hxu@3w4vyod2n74r>
Date: Tue, 19 Aug 2025 22:01:03 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Jun Nie <jun.nie@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 11/13] drm/msm/dpu: support SSPP assignment for
 quad-pipe case

On Tue, Aug 19, 2025 at 09:31:05AM +0800, Jun Nie wrote:
> Currently, SSPPs are assigned to a maximum of two pipes. However,
> quad-pipe usage scenarios require four pipes and involve configuring
> two stages. In quad-pipe case, the first two pipes share a set of
> mixer configurations and enable multi-rect mode when certain
> conditions are met. The same applies to the subsequent two pipes.
> 
> Assign SSPPs to the pipes in each stage using a unified method and
> to loop the stages accordingly.
> 
> Signed-off-by: Jun Nie <jun.nie@...aro.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 150 ++++++++++++++++++------------
>  1 file changed, 89 insertions(+), 61 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>


-- 
With best wishes
Dmitry