Re: [PATCH v6 03/10] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property

From: Thierry Reding

Date: Fri May 22 2026 - 06:17:21 EST


On Tue, Mar 31, 2026 at 03:52:56PM +0530, Akhil R wrote:
> Add iommu-map property to specify separate stream IDs for each DMA
> channel. This enables each channel to be in its own IOMMU domain,
> keeping memory isolated from other devices sharing the same DMA
> controller.
>
> Define the constraints such that if the channel and stream IDs are
> contiguous, a single entry can map all the channels, but if the
> channels or stream IDs are non-contiguous support multiple entries.
>
> Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx>
> Acked-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> ---
> .../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 9 +++++++++
> 1 file changed, 9 insertions(+)

Acked-by: Thierry Reding <treding@xxxxxxxxxx>

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