linux-kernel - Re: [PATCH 2/4] dt-bindings: Add a binding for Mediatek MDP

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Date:	Sat, 16 Jul 2016 18:01:13 -0500
From:	Rob Herring <robh@...nel.org>
To:	Minghsiu Tsai <minghsiu.tsai@...iatek.com>
Cc:	Hans Verkuil <hans.verkuil@...co.com>, daniel.thompson@...aro.org,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Pawel Osciak <posciak@...omium.org>,
	srv_heupstream@...iatek.com,
	Eddie Huang <eddie.huang@...iatek.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 2/4] dt-bindings: Add a binding for Mediatek MDP

On Thu, Jul 14, 2016 at 08:17:59PM +0800, Minghsiu Tsai wrote:
> Add a DT binding documentation of MDP for the MT8173 SoC
> from Mediatek
> 
> Signed-off-by: Minghsiu Tsai <minghsiu.tsai@...iatek.com>
> ---
>  .../devicetree/bindings/media/mediatek-mdp.txt     |   92 ++++++++++++++++++++
>  1 file changed, 92 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/mediatek-mdp.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/mediatek-mdp.txt b/Documentation/devicetree/bindings/media/mediatek-mdp.txt
> new file mode 100644
> index 0000000..ef570c3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/mediatek-mdp.txt
> @@ -0,0 +1,92 @@
> +* Mediatek Media Data Path
> +
> +Media Data Path is used for scaling and color space conversion.
> +
> +Required properties:
> +  - compatible : should contain them as below:
> +        "mediatek,mt8173-mdp"
> +        "mediatek,mt8173-mdp-rdma"
> +        "mediatek,mt8173-mdp-rsz"
> +        "mediatek,mt8173-mdp-wdma"
> +        "mediatek,mt8173-mdp-wrot"
> +  - clocks : device clocks
> +  - power-domains : a phandle to the power domain.
> +  - mediatek,larb : should contain the larbes of current platform
> +  - iommus : Mediatek IOMMU H/W has designed the fixed associations with
> +        the multimedia H/W. and there is only one multimedia iommu domain.
> +        "iommus = <&iommu portid>" the "portid" is from
> +        dt-bindings\iommu\mt8173-iommu-port.h, it means that this portid will
> +        enable iommu. The portid default is disable iommu if "<&iommu portid>"
> +        don't be added.
> +  - mediatek,vpu : the node of video processor unit

These properties don't apply to all the nodes. I think you need a 
section for each IP block.