tree 29e5a34d5b5c2c691be9e081f1ce41b68e9abfa3
parent 1c12e032cc43256d75fdd22e60a7df85e8df4549
parent ca5ce0caa67fa9eeecaa29d895c2e4c3151c159e
author Mark Brown <broonie@kernel.org> 1679426628 +0000
committer Mark Brown <broonie@kernel.org> 1679426628 +0000
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ASoC: SOF: ipc4/intel: Support for ChainDMA

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

On a platform when the DSP is in use, we cannot select individual links
to use or not use the DSP, it is either all or none.  On some audio
endpoint, like HDMI/DP, it is preferred to not use any processing in DSP
to reduce the latency and to allow bytestream pass-through (DTS, DD,
etc)

IPC4 introduces a new type of end-to-end connection within the DSP which
is using the host DMA and link DMA in a single buffer, working
back-to-back, passing the received data without looking at it or trying
to understand the format, content.

This mode reduces the latency and allows non PCM streams to be sent from
userspace.

The feature is enabled per PCM bases, signalled in topology.