linux-kernel - Re: [PATCH 10/19] dt-bindings: arm-smmu: Add compatible string for Adreno GPU SMMU

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Date:   Tue, 1 Sep 2020 00:00:46 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, iommu@...ts.linux-foundation.org,
        linux-arm-msm@...r.kernel.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Will Deacon <will@...nel.org>, freedreno@...ts.freedesktop.org,
        Sibi Sankar <sibis@...eaurora.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Rob Herring <robh@...nel.org>,
        Rob Clark <robdclark@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/19] dt-bindings: arm-smmu: Add compatible string for
 Adreno GPU SMMU

On Thu 13 Aug 21:41 CDT 2020, Rob Clark wrote:

> From: Jordan Crouse <jcrouse@...eaurora.org>
> 
> Every Qcom Adreno GPU has an embedded SMMU for its own use. These
> devices depend on unique features such as split pagetables,
> different stall/halt requirements and other settings. Identify them
> with a compatible string so that they can be identified in the
> arm-smmu implementation specific code.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>  Documentation/devicetree/bindings/iommu/arm,smmu.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> index 503160a7b9a0..5ec5d0d691f6 100644
> --- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> @@ -40,6 +40,10 @@ properties:
>                - qcom,sm8150-smmu-500
>                - qcom,sm8250-smmu-500
>            - const: arm,mmu-500
> +      - description: Qcom Adreno GPUs implementing "arm,smmu-v2"
> +        items:
> +          - const: qcom,adreno-smmu
> +          - const: qcom,smmu-v2
>        - description: Marvell SoCs implementing "arm,mmu-500"
>          items:
>            - const: marvell,ap806-smmu-500
> -- 
> 2.26.2
>