ASoC: qcom: q6apm: Support reserved memory buffers#1374
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Use the result payload returned for APM_CMD_SHARED_MEM_UNMAP_REGIONS instead of forcing a successful completion. Clear the memory map handle only when the DSP reports success, and keep error reporting tied to the returned status so callers can detect failed unmap operations. Signed-off-by: Pratyush Meduri <mpratyus@qti.qualcomm.com>
Add support for q6apm DAI instances that allocate PCM buffers from a reserved memory carveout instead of an IOMMU-mapped DMA allocation. Parse the optional memory-region property, size the ALSA buffer constraints to the carveout, and map the fixed physical region to the DSP graph when the stream is prepared. Support TrustZone VMID reassignment for both normal DMA buffers and reserved memory. Allow platforms to specify the source VMID tracked by SCM, share the buffer with the configured destination VMIDs, and restore ownership during stream teardown. Signed-off-by: Pratyush Meduri <mpratyus@qti.qualcomm.com>
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Add support for q6apm DAI instances that allocate PCM buffers from a
reserved memory carveout instead of an IOMMU-mapped DMA allocation. Parse
the optional memory-region property, size the ALSA buffer constraints to
the carveout, and map the fixed physical region to the DSP graph when the
stream is prepared.
Support TrustZone VMID reassignment for both normal DMA buffers and
reserved memory. Allow platforms to specify the source VMID tracked by
SCM, share the buffer with the configured destination VMIDs, and restore
ownership during stream teardown.