[alsa-devel] [PATCH v4 00/11] ASoC: SOF: Data probing

[Cezary Rojewski]

This set of patches achieves few goals in order to enable data probing
feature for audio DSP.

First, provide new and alter existing interfaces (page allocation,
runtime flow adjustments) to make them compress friendly.

For HDA part, work has been done to account for compress streams when
servicing IRQs, setting up BDLs and assigning DMAs.

Finally, the end goal which are the probe APIs and usage itself. Probes
can be treated as endpoints which allow for data extraction from or
injection to target module - a great ally when debugging problematic
audio issues such as distortions, glitches or gaps.
Compress streams are a weapon of choice here to provide a lightweight
implementation.

While all available IPCs have been defined, current implementation
covers extraction only, with injection scheduled for a later date.

Initial review and development of probes can be found under:
https://github.com/thesofproject/linux/pull/1276

with the hda-compress-enable set of patches being separated and
reviewed on:
https://github.com/thesofproject/linux/pull/1571

Tested on CML-U with rt5682 i2s board.

Changes in v4:
- No changes to ALSA core and hda patches

- 'probe' source added in patch "ASoC: SOF: Implement Probe IPC API" now
  only compiled if SND_SOC_SOF_DEBUG_PROBES is enabled. Said kconfig
  initial declaration has been moved to that patch too
- 'extractor_stream_tag' field now decorated with _DEBUG_PROBES to
  account for the change above
- Debugfs probe handlers now check if extractor stream is running before
  continuing. To achieve this, 'extractor_stream_tag' is both initialized
  and set to SOF_PROBE_INVALID_NODE_ID on sof_probe_compr_free().
  Suggestion provided by Pierre

- Reverted SND_SOC_SOF_HDA_LINK requirement-removal change for HDA probes.
  Code requires SND_HDA_EXT_CORE in order to function on Intel platforms
- Relocated probe-compress related code from /sof/pcm.c directly to
  /sof/compress.c as requested by Daniel

Changes in v3:
- No changes to ALSA core and hda patches

- Addressed sparse and all doc related warnings as reported by Pierre
- Moved _DEBUG_PROBES config outside of _DEVELOPER_SUPPORT block
- Renamed 'extractor' field to 'extractor_stream_tag' as requested
- Relocated 'extractor_stream_tag' declaration from patch 07 to 08

Changes in v2:
- No changes to ALSA core and hda patches

- Removed "ASoC: Intel: sof_rt5682: Add compress probe DAI links" from
  the patchset list as requested by Pierre
- updated copyright header for newly added files (dates)
- probes over HDA no longer require SND_SOC_SOF_HDA_LINK enabled
- renamed debugfs probe functions as requested by Pierre

- probe IPC API has been updated to align with newest SOF FW & probe
  debug app (struct_size macro has been enlisted to make the size
  calculations transparent). This targets only "ASoC: SOF: Implement
  Probe IPC API" patch

Cezary Rojewski (11):
  ALSA: hda: Allow for compress stream to hdac_ext_stream assignment
  ALSA: hda: Prepare for compress stream support
  ALSA: hda: Interrupt servicing and BDL setup for compress streams
  ALSA: core: Expand DMA buffer information
  ALSA: core: Implement compress page allocation and free routines
  ASoC: SOF: Intel: Account for compress streams when servicing IRQs
  ASoC: SOF: Implement Probe IPC API
  ASoC: SOF: Generic probe compress operations
  ASoC: SOF: Intel: Probe compress operations
  ASoC: SOF: Provide probe debugfs support
  ASoC: SOF: Intel: Add Probe compress CPU DAIs

 include/sound/compress_driver.h    |  40 +++-
 include/sound/hdaudio.h            |   2 +
 include/sound/hdaudio_ext.h        |   2 +
 include/sound/sof/header.h         |  11 ++
 sound/core/compress_offload.c      |  42 +++++
 sound/hda/ext/hdac_ext_stream.c    |  49 ++++-
 sound/hda/hdac_controller.c        |   4 +-
 sound/hda/hdac_stream.c            |  52 ++++--
 sound/soc/sof/Kconfig              |   9 +
 sound/soc/sof/Makefile             |   1 +
 sound/soc/sof/compress.c           | 146 +++++++++++++++
 sound/soc/sof/compress.h           |  31 ++++
 sound/soc/sof/core.c               |   6 +
 sound/soc/sof/debug.c              | 226 +++++++++++++++++++++++
 sound/soc/sof/intel/Kconfig        |  10 +
 sound/soc/sof/intel/Makefile       |   1 +
 sound/soc/sof/intel/apl.c          |   9 +
 sound/soc/sof/intel/cnl.c          |   9 +
 sound/soc/sof/intel/hda-compress.c | 132 +++++++++++++
 sound/soc/sof/intel/hda-dai.c      |  28 +++
 sound/soc/sof/intel/hda-ipc.c      |   4 +-
 sound/soc/sof/intel/hda-stream.c   |  26 ++-
 sound/soc/sof/intel/hda.h          |  30 +++
 sound/soc/sof/ops.h                |  43 +++++
 sound/soc/sof/pcm.c                |   7 +
 sound/soc/sof/probe.c              | 286 +++++++++++++++++++++++++++++
 sound/soc/sof/probe.h              |  85 +++++++++
 sound/soc/sof/sof-priv.h           |  25 +++
 28 files changed, 1277 insertions(+), 39 deletions(-)
 create mode 100644 sound/soc/sof/compress.c
 create mode 100644 sound/soc/sof/compress.h
 create mode 100644 sound/soc/sof/intel/hda-compress.c
 create mode 100644 sound/soc/sof/probe.c
 create mode 100644 sound/soc/sof/probe.h

-- 
2.17.1