linux-kernel - Re: [PATCH v4 02/22] drm/msm/dpu: Remove TE2 block and feature from DPU >= 5.0.0 hardware

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Message-ID: <7cec3d06-9d96-0e58-7920-3e86a26f190d@quicinc.com>
Date:   Wed, 26 Apr 2023 15:42:40 -0700
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Marijn Suijten <marijn.suijten@...ainline.org>,
        Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        "Sean Paul" <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Adam Skladowski <a39.skl@...il.com>,
        Loic Poulain <loic.poulain@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Kuogee Hsieh" <quic_khsieh@...cinc.com>,
        Robert Foss <rfoss@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>
CC:     <~postmarketos/upstreaming@...ts.sr.ht>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Martin Botka <martin.botka@...ainline.org>,
        "Jami Kettunen" <jami.kettunen@...ainline.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Jessica Zhang <quic_jesszhan@...cinc.com>
Subject: Re: [PATCH v4 02/22] drm/msm/dpu: Remove TE2 block and feature from
 DPU >= 5.0.0 hardware



On 4/26/2023 3:37 PM, Marijn Suijten wrote:
> No hardware beyond kona (sm8250, DPU 6.0.0) defines the TE2 PINGPONG
> sub-block offset downstream, and according to insiders no DPU >= 5.0.0
> hardware has support for it either.  Especially since neither downstream
> nor upstream utilize these registers in any way, remove the erroneous
> specification from SM8150, SC8180X, SM8250, SC7180, SM8350, SC8280XP and
> SM8450 to prevent confusion.
> 
> Note that downstream enables the PPSPLIT (split-FIFO) topology (single
> LM for 2 PP and 2 INTF) based on the presence of a TE2 block.
> 
> Fixes: 386fced3f76f ("drm/msm/dpu: add SM8150 to hw catalog")
> Fixes: 7bdc0c4b8126 ("msm:disp:dpu1: add support for display for SC7180 target")
> Fixes: 0e91bcbb0016 ("drm/msm/dpu: Add SM8350 to hw catalog")
> Fixes: 4a352c2fc15a ("drm/msm/dpu: Introduce SC8280XP")
> Fixes: 100d7ef6995d ("drm/msm/dpu: add support for SM8450")
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---

Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>