Re: [PATCH v5 3/4] dt-bindings: sound: qcom,q6apm-dai: add memory-region and relax iommus

["Rob Herring (Arm)" <robh@kernel.org>]

On Tue, 22 Sep 2026 00:38:11 +0530, Ajay Kumar Nandam wrote:
> On modem-DSP (mDSP) platforms the DSP runs in a stage-2 protected
> context and cannot use the SMMU. PCM buffers must live in reserved-memory
> carveouts that are SCM-assigned to the appropriate VMIDs.
> 
> Add an optional memory-region property (1-2 entries) for the
> control-path and data-path carveouts, and remove iommus from the
> required list since mDSP platforms have neither IOMMU nor VMID DT
> properties.
> 
> Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
> ---
>  Documentation/devicetree/bindings/sound/qcom,q6apm-dai.yaml | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/sound/qcom,q6apm-dai.yaml: properties:memory-region: {'minItems': 1, 'maxItems': 2, 'items': [{'description': 'Control-path buffer (audio_heap_mem) for platforms where the DSP runs in a stage-2 protected context (e.g. modem-DSP).'}, {'description': 'Data-path buffer pool from which per-stream DMA buffers are allocated.'}]} should not be valid under {'required': ['maxItems']}
	hint: "maxItems" is not needed with an "items" list
	from schema $id: http://devicetree.org/meta-schemas/items.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260922-vmid-v4-v5-3-e79cfd7af5b3@oss.qualcomm.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.