[alsa-devel] [PATCH v3 00/13] Enable HDA Codec support on Intel Platforms

[Takashi Iwai]

On Sat, 02 Jun 2018 05:53:48 +0200,
Pierre-Louis Bossart wrote:
> 
> 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 v3 is not split into two batches as done for v1 and v2, but keeps
> the same logical progression. The first three patches are mostly data
> structure changes, the DSP support capability is added then with an
> ASoC HDA driver and the last patches are fixes required for
> Skylake+. The changes to the HDAudio legacy driver are minimal.
> 
> Tests were run successfully on multiple platforms (Dell XPS13, KBL
> NUC, APL NUC and LeafHill reference board).
> 
> 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.
> 
> 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.
> 
> Rakesh Ughreja (13):
>   ALSA: hdac: Remove usage of struct hdac_ext_device and use hdac_device
>     instead
>   ALSA: hdac: Remove usage of struct hdac_ext_bus and use hdac_bus
>     instead
>   ALSA: hdac: Remove usage of struct hdac_ext_driver, use hdac_driver
>     instead
>   ASoC: Intel: Boards: Machine driver for SKL+ w/ HDAudio codecs
>   ASoC: Intel: Skylake: Add entry in sst_acpi_mach for HDA codecs
>   ASoC: Intel: Skylake: add HDA BE DAIs
>   ASoC: Intel: Skylake: use hda_bus instead of hdac_bus
>   ALSA: hda: split snd_hda_codec_new function
>   ALSA: hdac: remove memory allocation from snd_hdac_ext_bus_device_init
>   ALSA: hdac: add extended ops in the hdac_bus
>   ASoC: hdac_hda: add asoc extension for legacy HDA codec drivers
>   ALSA: hdac: ext: add wait for codec to respond after link reset
>   ASoC: Intel: Skylake: fix widget handling

Thanks for the patches.  But, from obvious reasons, we can't take
these for the next merge window.  So it's really no good timing for
such a big series...

In anyways, the patch series look like a mixture of lots of different
things.  Maybe it's better to split to multiple series, namely:

- Individual fixes

Patches 12 and 13 are irrelevant with the whole story, and they are
merely fixes, can be applied individually. 
(the patch13 might be depending on others, though; didn't take a
 deeper look at it yet.)

- The removal of hdac_ext_* structs

These are basically no functional changes and local in hdac_ext.
The preliminary work.  The regression test is mandatory.

- Some code split / exports in snd_hda_codec_*(), adaption of hdac_bus
  extended ops

Another preliminary work and a setup for the new binding.
They should be also no functional changes, and the existing setup
should work as is.  The regression test is mandatory.

- The new hdac_hdmi codec support and the new board codes

These are the new stuff, and applied after the preparations above.


... and these patches are touching both ASoC and HD-audio legacy, we'd
need the coordinated patch application.  That is, we'd need a topic
branch that will be merged to both Mark and my trees.  We can branch it
off after 4.18-rc1 release, for example, as a clean start point.


thanks,

Takashi