Re: [PATCH v3 0/5] Introduce "non-pixel" sub node within iris video node

Bryan O'Donoghue
2025-10-07T14:29:20Z

On 07/10/2025 15:25, Bryan O'Donoghue wrote:
> Rob suggested using an implicit index for function id
>
> https://lore.kernel.org/all/CAL_JsqK9waZK=i+ov0jV-
> PonWSfddwHvE94Q+pks4zAEtKc+yg@mail.gmail.com/
>
> Couldn't we list the entire set of iommus - then detach - subsequently
> re-attaching in our platform code with FUNCTION_IDs we keep listed in
> our drivers ?
>
> That way the DT is complete and correct, we have a compliant upstream DT
> but we also find a way to make the FUNCTION_ID specific setup we need.

i.e. you can keep the FUNCTION_ID "metadata" in the driver and associate
specific iommu indexes with the FUNCTION_ID you want in there.

That way you could have multiple FUNCTION_ID smmu entries in the DT and
just associate the DT indexes locally in
drivers/platform/qcom/iris_metadata_goes_here.c

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bod