linux-kernel - Re: [PATCH] media: platform: mtk-mdp3: fix Kconfig dependencies

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Date:   Wed, 21 Dec 2022 11:38:29 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Arnd Bergmann <arnd@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Moudy Ho <moudy.ho@...iatek.com>,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] media: platform: mtk-mdp3: fix Kconfig dependencies

Il 15/12/22 17:40, Arnd Bergmann ha scritto:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The new mdp3 driver uses 'select' to force-enable a couple of drivers
> it depends on. This is error-prone and likely to cause dependency
> loops as well as warnings like:
> 
> WARNING: unmet direct dependencies detected for VIDEO_MEDIATEK_VPU
>    Depends on [n]: MEDIA_SUPPORT [=m] && MEDIA_PLATFORM_SUPPORT [=y] && MEDIA_PLATFORM_DRIVERS [=y] && V4L_MEM2MEM_DRIVERS [=n] && VIDEO_DEV [=m] && (ARCH_MEDIATEK [=y] || COMPILE_TEST [=y])
>    Selected by [m]:
>    - VIDEO_MEDIATEK_MDP3 [=m] && MEDIA_SUPPORT [=m] && MEDIA_PLATFORM_SUPPORT [=y] && MEDIA_PLATFORM_DRIVERS [=y] && (MTK_IOMMU [=m] || COMPILE_TEST [=y]) && VIDEO_DEV [=m] && (ARCH_MEDIATEK [=y] || COMPILE_TEST [=y]) && HAS_DMA [=y] && REMOTEPROC [=y]
> 
> This specific warning was already addressed in a previous patch,
> but there are similar unnecessary 'select' statements, so turn those
> into 'depends on'. This also means the dependency on ARCH_MEDIATEK
> is redundant and can be dropped.
> 
> Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
> Fixes: 9195a860ef0a ("media: platform: mtk-mdp3: remove unused VIDEO_MEDIATEK_VPU config")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>