linux-kernel - Re: [PATCH v16 10/10] drm/msm/dpu: Enable quad-pipe for DSC and dual-DSI case

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Message-ID: <46syobyexy3ya3jjemmxc5g4tfkup62cks7gg7qpbnrga4fdhw@4ramayspl5uw>
Date: Fri, 19 Sep 2025 19:57:18 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Jun Nie <jun.nie@...aro.org>
Cc: Abhinav Kumar <abhinav.kumar@...ux.dev>,
        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>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Jessica Zhang <quic_jesszhan@...cinc.com>
Subject: Re: [PATCH v16 10/10] drm/msm/dpu: Enable quad-pipe for DSC and
 dual-DSI case

On Thu, Sep 18, 2025 at 09:29:02PM +0800, Jun Nie wrote:
> To support high-resolution cases that exceed the width limitation of
> a pair of SSPPs, or scenarios that surpass the maximum MDP clock rate,
> additional pipes are necessary to enable parallel data processing
> within the SSPP width constraints and MDP clock rate.
> 
> Request 4 mixers and 4 DSCs for high-resolution cases where both DSC
> and dual interfaces are enabled. More use cases can be incorporated
> later if quad-pipe capabilities are required.
> 
> Signed-off-by: Jun Nie <jun.nie@...aro.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reviewed-by: Jessica Zhang <quic_jesszhan@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c         | 27 +++++++++++++++++------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h         |  6 ++---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c      | 28 ++++++++----------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h |  2 +-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h   |  2 +-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h      |  2 +-
>  6 files changed, 35 insertions(+), 32 deletions(-)
> 
Please fix the LKP report.

-- 
With best wishes
Dmitry