Subject: Re: [PATCH 1/5] dt-bindings: media: mtk-vcodec: Add dma-ranges property

From: Rob Herring <[email-masked]>
Date: Wed, 10 Feb 2021 16:53:23 -0600

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 <[email-masked]>
> ---
>  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
> 

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