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    • Mark Brown's avatar
      ASoC: SOF: ipc4/intel: Support for ChainDMA · e3057eb5
      Mark Brown authored
      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.
      e3057eb5