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PCM buffers must live in reserved-memory carveouts that are SCM-assigned to the appropriate VMIDs. Add a memory-region property (1-2 entries) for the control-path and data-path carveouts, and require q6apm-dais nodes to describe exactly one access path: iommus for SMMU-backed systems or memory-region for mDSP systems. Remove iommus from the common required list since mDSP platforms have neither IOMMU nor VMID DT properties. Signed-off-by: Ajay Kumar Nandam --- .../devicetree/bindings/sound/qcom,q6apm-dai.yaml | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/sound/qcom,q6apm-dai.yaml b/Documentation/devicetree/bindings/sound/qcom,q6apm-dai.yaml index 9e5b30d9c6e6..c1f9fc9eab64 100644 --- a/Documentation/devicetree/bindings/sound/qcom,q6apm-dai.yaml +++ b/Documentation/devicetree/bindings/sound/qcom,q6apm-dai.yaml @@ -20,9 +20,24 @@ properties: minItems: 1 maxItems: 2 + memory-region: + minItems: 1 + 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. + required: - compatible - - iommus + +oneOf: + - required: + - iommus + - required: + - memory-region additionalProperties: false -- 2.34.1