On Thu, Jun 3, 2021 at 10:49 AM Thierry Reding <thierry.reding@xxxxxxxxx> wrote: > > From: Thierry Reding <treding@xxxxxxxxxx> > > The ARM SMMU instantiations found on Tegra186 and later need inter- > operation with the memory controller in order to correctly program > stream ID overrides. > > Furthermore, on Tegra194 multiple instances of the SMMU can gang up > to achieve higher throughput. In order to do this, they have to be > programmed identically so that the memory controller can interleave > memory accesses between them. > > Add the Tegra186 compatible string to make sure the interoperation > with the memory controller can be enabled on that SoC generation. > > Signed-off-by: Thierry Reding <treding@xxxxxxxxxx> > --- > Documentation/devicetree/bindings/iommu/arm,smmu.yaml | 11 +++++++++-- > 1 file changed, 9 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml > index 9d27aa5111d4..1181b590db71 100644 > --- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml > +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml > @@ -54,8 +54,14 @@ properties: > - const: arm,mmu-500 > - description: NVIDIA SoCs that program two ARM MMU-500s identically > items: > + - description: NVIDIA SoCs that require memory controller interaction This is not valid jsonschema: /builds/robherring/linux-dt/Documentation/devicetree/bindings/iommu/arm,smmu.yaml: properties:compatible:oneOf:4:items: 'anyOf' conditional failed, one must be fixed: None is not of type 'object', 'boolean' None is not of type 'array' from schema $id: http://json-schema.org/draft-07/schema# /builds/robherring/linux-dt/Documentation/devicetree/bindings/iommu/arm,smmu.yaml: properties:compatible:oneOf:4:items: 'oneOf' conditional failed, one must be fixed: None is not of type 'object' None is not of type 'array' from schema $id: http://devicetree.org/meta-schemas/keywords.yaml# /builds/robherring/linux-dt/Documentation/devicetree/bindings/iommu/arm,smmu.yaml: properties:compatible:oneOf:4:items: 'oneOf' conditional failed, one must be fixed: None is not of type 'object' None is not of type 'array' from schema $id: http://devicetree.org/meta-schemas/string-array.yaml# /builds/robherring/linux-dt/Documentation/devicetree/bindings/iommu/arm,smmu.yaml: properties:compatible:oneOf:5:items: 'oneOf' conditional failed, one must be fixed: [{'enum': [{'const': 'nvidia,tegra194-smmu'}, {'const': 'nvidia,tegra186-smmu'}]}, {'const': 'nvidia,smmu-500'}] is not of type 'object' {'const': 'nvidia,tegra194-smmu'} is not of type 'string' {'const': 'nvidia,tegra186-smmu'} is not of type 'string' from schema $id: http://devicetree.org/meta-schemas/string-array.yaml# This was not reviewed nor tested since the DT list was not Cc'ed. Rob
