Re: [PATCH v10 07/13] dt-bindings: arm-smmu: Add compatible string for Adreno GPU SMMU

[Rob Clark]

On Mon, Jul 20, 2020 at 8:41 AM Jordan Crouse <jcrouse@xxxxxxxxxxxxxx> wrote:
>
> Every Qcom Adreno GPU has an embedded SMMU for its own use. These

minor detail: this is true for a3xx and later but not a2xx ;-)

> 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.
>
> Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
> Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> ---
>
>  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 d7ceb4c34423..e52a1b146c97 100644
> --- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
> @@ -38,6 +38,10 @@ properties:
>                - qcom,sc7180-smmu-500
>                - qcom,sdm845-smmu-500
>            - const: arm,mmu-500
> +      - description: Qcom Adreno GPUs implementing "arm,smmu-v2"
> +        items:
> +          - const: qcom,adreno-smmu
> +          - const: qcom,smmu-v2
>        - items:
>            - const: arm,mmu-500
>            - const: arm,smmu-v2
> --
> 2.25.1
>
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