Re: [PATCH v2 1/2] dt-bindings: media: qcom,sm8550-iris: Allow IOVA reservation memory-region
From: Krzysztof Kozlowski
Date: Mon Jun 15 2026 - 02:02:27 EST
On Sun, Jun 14, 2026 at 10:51:11PM +0800, Daniel J Blueman wrote:
> In addition to the firmware-loaded codec carveout, some Iris platforms
> need to declare an IOMMU IOVA reservation (a reserved-memory node with
> iommu-addresses) to keep DMA away from IOVA ranges that earlier
> firmware stages have already mapped through the SMMU.
>
> Permit a second memory-region phandle for this purpose, and describe
> the meaning of each entry so the ordering is unambiguous.
>
> Fixes: 9065340ac04d ("arm64: dts: qcom: x1e80100: Add IRIS video codec")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Daniel J Blueman <daniel@xxxxxxxxx>
> ---
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxxxxx>
Best regards,
Krzysztof