[PATCH] arm64: tegra: Enable audio IOMMU support on Tegra194

[Jon Hunter]

On 09/07/2021 13:11, Thierry Reding wrote:
> From: Thierry Reding <treding at nvidia.com>
> 
> Add iommus and interconnects properties to the sound device tree node on
> Tegra194. This ensures that the correct SID is used for translation of
> physical to I/O virtual addresses and that the path to system memory is
> properly described, which in turn can impact the range of memory that
> the device can address.
> 
> Signed-off-by: Thierry Reding <treding at nvidia.com>
> ---
>  arch/arm64/boot/dts/nvidia/tegra194.dtsi | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> index a6e61d899a27..076d5efc4c3d 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> @@ -2477,6 +2477,11 @@ sound {
>  		 * for 8x and 11.025x sample rate streams.
>  		 */
>  		assigned-clock-rates = <258000000>;
> +
> +		interconnects = <&mc TEGRA194_MEMORY_CLIENT_APEDMAR &emc>,
> +				<&mc TEGRA194_MEMORY_CLIENT_APEDMAW &emc>;
> +		interconnect-names = "dma-mem", "write";
> +		iommus = <&smmu TEGRA194_SID_APE>;
>  	};
>  
>  	tcu: tcu {
> 


Reviewed-by: Jon Hunter <jonathanh at nvidia.com>

Thanks!
Jon

-- 
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