Re: [PATCH] arm64: dts: qcom: sc8280xp: add missing Iris IOMMU SID

[Konrad Dybcio]

On 10/29/26 5:14 PM, Xilin Wu wrote:
> The Iris VPU on SC8280XP can issue memory transactions using stream ID
> 0x2a07. With only the 0x2a00 SID described in the IOMMU list, those
> transactions are not attached to the Iris IOMMU domain and can trigger a
> non-secure SMMU global fault during video decode.
> 
> This was observed while decoding H.264, where the faulting address fell
> inside a DPB buffer mapped for the Iris device.
> 
> Add the missing 0x2a07 stream ID so both Iris access paths are mapped by
> the SMMU.
> 
> Note that the issue was observed using Gen2 HFI firmware.
> 
> Signed-off-by: Xilin Wu <sophon@xxxxxxxxx>
> ---

Any chance you're running into this?

https://lore.kernel.org/linux-arm-msm/20260926-vpu_iommu_iova_handling-v5-0-0322ca5dc10c@xxxxxxxxxxxxxxxx/

Konrad