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Date:   Wed, 10 Feb 2021 16:53:23 -0600
From:   Rob Herring <robh@kernel.org>
To:     Irui Wang <irui.wang@mediatek.com>
Cc:     Alexandre Courbot <acourbot@chromium.org>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Tiffany Lin <tiffany.lin@mediatek.com>,
        Andrew-CT Chen <andrew-ct.chen@mediatek.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Fritz Koenig <frkoenig@chromium.org>,
        Tzung-Bi Shih <tzungbi@chromium.org>,
        Maoguang Meng <maoguang.meng@mediatek.com>,
        Longfei Wang <longfei.wang@mediatek.com>,
        Yunfei Dong <yunfei.dong@mediatek.com>,
        linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org
Subject: Re: [PATCH 1/5] dt-bindings: media: mtk-vcodec: Add dma-ranges
 property
Message-ID: <20210210225323.GA2961490@robh.at.kernel.org>
References: <20210203083752.12586-1-irui.wang@mediatek.com>
 <20210203083752.12586-2-irui.wang@mediatek.com>
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On Wed, Feb 03, 2021 at 04:37:48PM +0800, Irui Wang wrote:
> Adds dma-ranges property for DMA addresses translation.
> 
> Signed-off-by: Irui Wang <irui.wang@mediatek.com>
> ---
>  Documentation/devicetree/bindings/media/mediatek-vcodec.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> index f85276e629bf..e4644f8caee9 100644
> --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
> @@ -23,6 +23,8 @@ Required properties:
>  - iommus : should point to the respective IOMMU block with master port as
>    argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
>    for details.
> +- dma-ranges : describes how the physical address space of the IOMMU maps
> +  to memory.

dma-ranges is supposed to be in a bus/parent node.

>  One of the two following nodes:
>  - mediatek,vpu : the node of the video processor unit, if using VPU.
>  - mediatek,scp : the node of the SCP unit, if using SCP.
> -- 
> 2.25.1
>