linux-kernel - Re: [PATCH v15 12/13] drm/msm/dpu: support plane splitting in quad-pipe case

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Message-ID: <xcq25wmw7roelcmoljypn3ozt7kqvylgibz2cloxghaeurcwvs@jjay7hton6md>
Date: Wed, 3 Sep 2025 12:39:43 +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 12/13] drm/msm/dpu: support plane splitting in
 quad-pipe case

On Tue, Aug 19, 2025 at 09:31:06AM +0800, Jun Nie wrote:
> The content of every half of screen is sent out via one interface in
> dual-DSI case. The content for every interface is blended by a LM
> pair in quad-pipe case, thus a LM pair should not blend any content
> that cross the half of screen in this case. Clip plane into pipes per
> left and right half screen ROI if topology is quad pipe case.
> 
> The clipped rectangle on every half of screen is futher handled by two
> pipes if its width exceeds a limit for a single pipe.
> 
> Signed-off-by: Jun Nie <jun.nie@...aro.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

I've run several CI workloads. This is the first commit which breaks IGT
tests. See https://gitlab.freedesktop.org/drm/msm/-/pipelines/1503075

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c  |  11 +++
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h  |   2 +
>  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 137 +++++++++++++++++++++---------
>  3 files changed, 110 insertions(+), 40 deletions(-)

-- 
With best wishes
Dmitry