Re: [PATCH 14/14] ARM: tegra: Enable SMMU for VDE on Tegra124

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On Monday, 13 August 2018 17:50:27 MSK Thierry Reding wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
> 
> The video decode engine can use the SMMU to use buffers that are not
> physically contiguous in memory. This allows better memory usage for
> video decoding, since fragmentation may cause contiguous allocations
> to fail.
> 
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> ---
>  arch/arm/boot/dts/tegra124.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/tegra124.dtsi
> b/arch/arm/boot/dts/tegra124.dtsi index 8fdca4723205..0713e0ed5fef 100644
> --- a/arch/arm/boot/dts/tegra124.dtsi
> +++ b/arch/arm/boot/dts/tegra124.dtsi
> @@ -321,6 +321,8 @@
>  		resets = <&tegra_car 61>,
>  			 <&tegra_car 63>;
>  		reset-names = "vde", "bsev";
> +
> +		iommus = <&mc TEGRA_SWGROUP_VDE>;
>  	};
> 
>  	apbdma: dma@60020000 {

Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>

The same should be applied to Tegra30.





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