[PATCH 00/10] ASoC: SOF: Support for echoref (virtual DAI)

[Peter Ujfalusi <peter.ujfalusi@linux.intel.com>]

Hi,

The series adds support for echo reference functionality by allowing
the capturing of playback audio right before it leaves the DSP.
For this to work correctly we need a virtual DAI that is also connected
to the echo reference capture device and in absence of playback a
signal generator generates silence to allow the capture to run.
When the real playback starts, application will start to receive the
playback audio to be usable for echo reference.

Regards,
Peter
---
Ranjani Sridharan (10):
  ASoC: SOF: sof-audio: Add a new op in struct sof_ipc_tplg_ops
  ASoC: SOF: pcm: Split up widget prepare and setup
  uapi: sound: sof: tokens: Add missing token for KCPS
  ASoC: Intel: sof_sdw: Add a DAI link for loopback capture
  ASoC: SOF: ipc4-topology: Add new tokens for pipeline direction
  ASoC: SOF: ipc4-topology: Add support for process modules with no
    input pins
  ASoC: SOF: sof-audio: Traverse paths with aggregated DAI widgets
  ASoC: SOF: sof-audio: Add support for loopback capture
  ASoC: SOF: Intel: hda: Fix NULL pointer dereference
  ASoC: SOF: Intel: hda: Add a virtual CPU DAI

 include/uapi/sound/sof/tokens.h  |   3 +
 sound/soc/intel/boards/sof_sdw.c |  43 ++++++-
 sound/soc/sof/intel/hda-dai.c    |  22 +++-
 sound/soc/sof/intel/hda.h        |   4 +-
 sound/soc/sof/ipc4-topology.c    |  82 ++++++++++--
 sound/soc/sof/ipc4-topology.h    |   4 +
 sound/soc/sof/pcm.c              |  81 +++++++++---
 sound/soc/sof/sof-audio.c        | 215 ++++++++++++++++++++++---------
 sound/soc/sof/sof-audio.h        |  15 +++
 9 files changed, 370 insertions(+), 99 deletions(-)

-- 
2.52.0