[PATCH 0/7] ASoC: Intel: avs: Soundwire support

[Cezary Rojewski <cezary.rojewski@intel.com>]

The RaptorLake-P and RaptorLake-M based platform used in Automotive area
do utilize SoundWire for streaming audio.  This patchset brings such
support to the public domain.

If possible, I'd like the changes to go through Mark's tree.

As the patchset updates drivers/soundwire, I've decided to strip it off
any machine-boards and have here just the changes done to the main
soundwire driver and their user/usage.  Machine boards for RPL-P/M will
follow in a separate set and do not touch drivers/soundwire stuff.


The reasoning behind modyfing the soundwire code:

Typically dai->startup() is responsible for checking if all the required
resources are available whereas dai->hw_params() is responsible for
configuring such resources.  Existing code does the PDI assignment and
its configuration within one function - intel_hw_params().  The logical
split is not possible.  The change provides functions that represent
such logical blocks: assign, release and config.  Such division exists
already for the HDAudio interface, see sound/hda/core/stream.c

For the user i.e.: avs-driver (sound/soc/intel/avs) it also makes the
code very cohesive - aligns with that's done on the HDAudio side as all
the HDAudio streams are assignment during dai->startup() and configured
with dai->hw_params().  

Also, the existing code fetches the PDIs based on pre-defined "dai_id".
That's not the case for the avs-driver.  It simply asks: "is any PDI
free?" and assigns it for the substream if one is found.
No predefining.  Again, this aligns with how HDAudio streaming is done.

avs-driver -only patches follow the three soundwire ones.  First, they
extend the existing code so it can accommodate SDW interface.  With that
done, laverage existing PCM code (sound/soc/intel/avs/pcm.c) and
soundwire-intel to implement DAI operations.

Cezary Rojewski (7):
  soundwire: intel: Define stubs when library is disabled
  soundwire: intel: Allow for dynamic assignment of PDIs
  soundwire: intel: Split PDIs and DAIs initialization
  ASoC: Intel: avs: Pass irq to dsp_interrupt callback
  ASoC: Intel: avs: SoundWire support
  ASoC: Intel: avs: Expose common PCM functions
  ASoC: Intel: avs: SoundWire PCM BE operations

 drivers/soundwire/cadence_master.c    |  64 ++++++
 drivers/soundwire/cadence_master.h    |  24 +--
 drivers/soundwire/intel.c             |  40 +++-
 drivers/soundwire/intel.h             |   3 +-
 drivers/soundwire/intel_auxdevice.c   |   4 +
 include/linux/soundwire/sdw_cadence.h |  35 ++++
 include/linux/soundwire/sdw_intel.h   |  41 ++++
 sound/hda/core/Kconfig                |   2 +-
 sound/hda/core/Makefile               |   3 +
 sound/soc/intel/Kconfig               |   1 +
 sound/soc/intel/avs/Makefile          |   4 +
 sound/soc/intel/avs/apl.c             |   2 +-
 sound/soc/intel/avs/avs.h             |  15 +-
 sound/soc/intel/avs/cnl.c             |  25 ++-
 sound/soc/intel/avs/core.c            |  24 ++-
 sound/soc/intel/avs/loader.c          |   3 +
 sound/soc/intel/avs/messages.h        |   2 +
 sound/soc/intel/avs/mtl.c             |   2 +-
 sound/soc/intel/avs/path.c            |   2 +
 sound/soc/intel/avs/pcm.c             |  42 +---
 sound/soc/intel/avs/pcm.h             |  51 +++++
 sound/soc/intel/avs/pcm_sdw.c         | 276 ++++++++++++++++++++++++++
 sound/soc/intel/avs/registers.h       |   4 +
 sound/soc/intel/avs/skl.c             |   2 +-
 sound/soc/intel/avs/soundwire.c       | 112 +++++++++++
 sound/soc/intel/avs/soundwire.h       |  63 ++++++
 26 files changed, 765 insertions(+), 81 deletions(-)
 create mode 100644 include/linux/soundwire/sdw_cadence.h
 create mode 100644 sound/soc/intel/avs/pcm_sdw.c
 create mode 100644 sound/soc/intel/avs/soundwire.c
 create mode 100644 sound/soc/intel/avs/soundwire.h

-- 
2.34.1