linux-kernel - Re: [PATCH v1 06/14] media: platform: mtk-mdp3: Modify mtk-img-ipi.h for MT8195 SCP

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Date:   Thu, 27 Jan 2022 16:02:44 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     "roy-cw.yeh" <roy-cw.yeh@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Fabien Parent <fparent@...libre.com>,
        "jason-jh . lin" <jason-jh.lin@...iatek.com>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        Moudy Ho <moudy.ho@...iatek.com>,
        "river . cheng" <river.cheng@...iatek.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v1 06/14] media: platform: mtk-mdp3: Modify mtk-img-ipi.h
 for MT8195 SCP

Il 17/01/22 06:52, roy-cw.yeh ha scritto:
> From: "Roy-CW.Yeh" <roy-cw.yeh@...iatek.com>
> 
> 1. Modify struct member to 4 byte-alignment for MT8195 SCP limitation
> 2. Add new struct for hw engine adding in MT8195
> 
> Signed-off-by: Roy-CW.Yeh <roy-cw.yeh@...iatek.com>

This will break MT8183; is there any new firmware for that SoC that will
synchronize these structures?

Alternatively, you should add a new version of these structures and select
them with a wrapper function on a per-SoC basis, or per firmware version.