linux-kernel - Re: [PATCH v7 10/14] media: mtk-jpegdec: Remove the setting for dma

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Message-ID: <fb349fa3-b6c3-90c7-65c6-e5614d007ac8@collabora.com>
Date:   Tue, 11 Apr 2023 12:12:45 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Yong Wu <yong.wu@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Hans Verkuil <hverkuil@...all.nl>, nfraprado@...labora.com,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux.dev, mingyuan.ma@...iatek.com,
        yf.wang@...iatek.com, jianjiao.zeng@...iatek.com,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        kyrie wu <kyrie.wu@...iatek.corp-partner.google.com>,
        chengci.xu@...iatek.com, youlin.pei@...iatek.com,
        anan.sun@...iatek.com, Bin Liu <bin.liu@...iatek.com>,
        kyrie wu <kyrie.wu@...iatek.com>
Subject: Re: [PATCH v7 10/14] media: mtk-jpegdec: Remove the setting for
 dma_mask

Il 11/04/23 11:31, Yong Wu ha scritto:
> In order to simplify the masters to set their respective dma masks, MTK
> IOMMU helps to centralize the processing. Because all the dma ranges is
> set in IOMMU, IOMMU knows well the dma mask requirements of masters. After
> this patch, the masters code does not need care
> dma-ranges/dma_mask related information.
> 
> Cc: Bin Liu <bin.liu@...iatek.com>
> Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
> Cc: kyrie wu <kyrie.wu@...iatek.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>

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