Re: [RFC PATCH 07/11] arm64: dts: qcom: hamoa: Move Iris IOMMUs to sub nodes

[Bryan O'Donoghue]

On 09/07/2026 13:35, Vikash Garodia wrote:
> The Iris VPU has separate streams with different IOVA constraints. The
> non-pixel stream must be limited to the 0-600 MB IOVA range, while the
> pixel stream can use the full IOVA space.
> Using a single set of IOMMU entries for the Iris node does not describe
> these per-stream limits and can allow accesses outside the supported
> range, which may lead to device crashes. One such issue was reported at:
> https://gitlab.freedesktop.org/drm/msm/-/work_items/100
>
> Add non-pixel and pixel child nodes, move each stream ID to its
> corresponding child node, and add a reserved IOVA range for the
> non-pixel stream.
>
> Co-developed-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vikash Garodia <vikash.garodia@xxxxxxxxxxxxxxxx>
In light of this patch, we should put a pause on Daniel's workaround.

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bod