[alsa-devel] [PATCH v6 0/7] Enable HDA Codec support on Intel Platforms​

[Pierre-Louis Bossart]

Many Intel platforms (SKL, KBL) etc. in the market supports enhanced
audio capabilities which also includes DSP processing. The default
HDaudio legacy driver does not allow for the use of the DSP, this
patch set makes it possible while reusing existing code for HDAudio
codecs and without significant changes to the legacy driver.

This v6 is based on Marks' for-next branch - the merge of
topic/drm_audio_component is not included here.

Tests were run successfully on multiple platforms (Dell XPS13, KBL
NUC, APL NUC and LeafHill reference board). Both the HDaudio and HDMI
outputs were tested.

Credits: all the initial code was written by Rakesh Ughreja, the
rebase to broonie/for-next, cleanups and additional tests were done by
Pierre Bossart.

TODO in future update:
1. fix the HDMI jack detection which only works after the mixer values
are set, which isn't practical for headless devices always connected
(this is a problem in the hdac_hdmi codec that was present before this
series was submitted)
2. when the screen goes blank, HDMI playback stops. This isn't related
to this patchset since we rely on the existing hdac_hdmi codec, but
will need additional investigations.

Changes v6 (comments from Mark and Takashi)
- simplify Kconfig options, remove FORCE for now and make code simpler
- change SPDIX style to C++ for C files
- add log message if invalid configuration reached
- remove static int counter, added private counter in context instead
- fixed a couple of indendation issues to make checkpatch.pl --strict happy

Changes v5 (comments from Vinod)
- fix SPDIF style across patches
- patch 1: update commit message to remove reference to "fix"
- patch 3: remove platform name assignment and Xmas tree style
- patch 7: simplify error handling, add missing _put() on errors,
  	   remove tests on ops, add switch statement, fix alignment
- patch 8: fix indentation issues, use bool instead of tristate

Changes v4:
- rebase/update on Takashi's topic/drm_audio_component branch
- changes in the HDaudio detection to avoid adding a fake ACPI ID
- new Kconfigs to control HDaudio detection

Changes v3:
- port to component model
- additional tests on ApolloLake and KabyLake NUC devices
- cleanups (alignment, typos, etc)

Changes v2:
- Resolved review comments and rebased to latest kernel.
- added module load support for codec drivers.

Pierre-Louis Bossart (2):
  ASoC: Intel: common: add table for HDA-based platforms
  ASoC: Intel: Skylake: add option to control HDAudio + DSP usage

Rakesh Ughreja (5):
  ASoC: Intel: Boards: Machine driver for SKL+ w/ HDAudio codecs
  ASoC: Intel: Skylake: use HDAudio if ACPI enumeration fails
  ASoC: Intel: Skylake: add HDA BE DAIs
  ASoC: Intel: Skylake: use hda_bus instead of hdac_bus
  ASoC: hdac_hda: add asoc extension for legacy HDA codec drivers

 include/sound/soc-acpi-intel-match.h          |   6 +
 sound/pci/hda/hda_bind.c                      |  12 +
 sound/soc/codecs/Kconfig                      |   5 +
 sound/soc/codecs/Makefile                     |   2 +
 sound/soc/codecs/hdac_hda.c                   | 485 ++++++++++++++++++
 sound/soc/codecs/hdac_hda.h                   |  24 +
 sound/soc/intel/Kconfig                       |   9 +
 sound/soc/intel/boards/Kconfig                |   9 +
 sound/soc/intel/boards/Makefile               |   2 +
 sound/soc/intel/boards/skl_hda_dsp_common.c   | 127 +++++
 sound/soc/intel/boards/skl_hda_dsp_common.h   |  38 ++
 sound/soc/intel/boards/skl_hda_dsp_generic.c  | 181 +++++++
 sound/soc/intel/common/Makefile               |   3 +-
 .../intel/common/soc-acpi-intel-hda-match.c   |  40 ++
 sound/soc/intel/skylake/skl-pcm.c             |  70 ++-
 sound/soc/intel/skylake/skl.c                 | 104 +++-
 sound/soc/intel/skylake/skl.h                 |  12 +-
 17 files changed, 1102 insertions(+), 27 deletions(-)
 create mode 100644 sound/soc/codecs/hdac_hda.c
 create mode 100644 sound/soc/codecs/hdac_hda.h
 create mode 100644 sound/soc/intel/boards/skl_hda_dsp_common.c
 create mode 100644 sound/soc/intel/boards/skl_hda_dsp_common.h
 create mode 100644 sound/soc/intel/boards/skl_hda_dsp_generic.c
 create mode 100644 sound/soc/intel/common/soc-acpi-intel-hda-match.c

-- 
2.17.1