linux-kernel - Re: [v1, 2/2] dt/bindings: drm/komeda: Adds SMMU support for D71 devicetree

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Date:   Tue, 30 Apr 2019 07:35:57 +0000
From:   "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To:     "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
CC:     Liviu Dudau <Liviu.Dudau@....com>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "seanpaul@...omium.org" <seanpaul@...omium.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Brian Starkey <Brian.Starkey@....com>,
        Ayan Halder <Ayan.Halder@....com>,
        "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
        nd <nd@....com>
Subject: Re: [v1, 2/2] dt/bindings: drm/komeda: Adds SMMU support for D71
 devicetree

On Tue, Apr 30, 2019 at 06:19:34AM +0000, Lowry Li (Arm Technology China) wrote:
> Updates the device-tree doc about how to enable SMMU by devicetree.
> 
> Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@....com>
> ---
>  Documentation/devicetree/bindings/display/arm,komeda.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> -- 
> 1.9.1
> 
> diff --git a/Documentation/devicetree/bindings/display/arm,komeda.txt b/Documentation/devicetree/bindings/display/arm,komeda.txt
> index 02b2265..b12c045 100644
> --- a/Documentation/devicetree/bindings/display/arm,komeda.txt
> +++ b/Documentation/devicetree/bindings/display/arm,komeda.txt
> @@ -11,6 +11,10 @@ Required properties:
>        - "pclk": for the APB interface clock
>  - #address-cells: Must be 1
>  - #size-cells: Must be 0
> +- iommus: configure the stream id to IOMMU, Must be configured if want to
> +    enable iommu in display. for how to configure this node please reference
> +        devicetree/bindings/iommu/arm,smmu-v3.txt,
> +        devicetree/bindings/iommu/iommu.txt
>  
>  Required properties for sub-node: pipeline@nq
>  Each device contains one or two pipeline sub-nodes (at least one), each
> @@ -44,6 +48,9 @@ Example:
>  		interrupts = <0 168 4>;
>  		clocks = <&dpu_mclk>, <&dpu_aclk>;
>  		clock-names = "mclk", "pclk";
> +		iommus = <&smmu 0>, <&smmu 1>, <&smmu 2>, <&smmu 3>,
> +			<&smmu 4>, <&smmu 5>, <&smmu 6>, <&smmu 7>,
> +			<&smmu 8>, <&smmu 9>;
>  
>  		dp0_pipe0: pipeline@0 {
>  			clocks = <&fpgaosc2>, <&dpu_aclk>;

Looks good to me

James
-- 
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>