Re: [RFC PATCH 0/6] ASoC:Intel:Skylake: Enable HDaudio legacy fallback

[Takashi Iwai]

On Tue, 20 Nov 2018 22:36:38 +0100,
Pierre-Louis Bossart wrote:
> 
> This patchset is provided as an RFC and should not be merged as is
> (Turkey break in the USA and more validation needed). This is however
> a good time to gather comments. This work is the result of multiple
> email discussions to finally provide more flexibility for
> distributions to chose whether to stick with the legacy HDaudio driver
> or to enable the SST/Skylake driver for newer platforms (required
> e.g. for digital microphone support)
> 
> The patches add support for CoffeeLake, simplify the probe for the
> Skylake driver, introduce more compile-time granularity so that
> platforms can be selected individually and last provide a dynamic
> fallback mechanism when two drivers are registered for the same PCI
> ID.
> 
> When the SOF driver is released, the same mechanism will be used to
> enable the SOF-legacy fallback. There will be no plans to enable an
> SOF->SST falback.

This looks like a sensible way to go, thanks for working on this!

While the fallback stuff might need more testing, the other patches
(addition of CFL-S and split of configs) are rather systematic, so we
can merge this at first soonish.

And we may need a bit more comments in Kconfig help for the fallback
behavior.  Or document it properly and refer to it from Kconfig help.
The git commit log isn't present in the released kernel code, after
all.


thanks,

Takashi

> 
> Pierre-Louis Bossart (4):
>   ASoC: Intel: Skylake: stop init/probe if DSP is not present
>   ASoC: Intel: Skylake: remove useless tests on DSP presence
>   ASoC: Intel: Skylake: Add more platform granularity
>   ALSA: hda: add fallback capabilities for SKL+ platforms
> 
> Takashi Iwai (2):
>   ASoC: Intel: Skylake: Add CFL-S support
>   ALSA: hda: Allow fallback binding with legacy HD-audio for Intel SKL+
> 
>  include/sound/hdaudio.h                |   6 +
>  sound/pci/hda/Kconfig                  |  40 +++++++
>  sound/pci/hda/hda_controller.h         |   2 +-
>  sound/pci/hda/hda_intel.c              |  51 ++++++--
>  sound/soc/intel/Kconfig                |  86 ++++++++++++--
>  sound/soc/intel/boards/Kconfig         |  16 ++-
>  sound/soc/intel/skylake/skl-messages.c |   8 ++
>  sound/soc/intel/skylake/skl.c          | 154 +++++++++++++++++++------
>  8 files changed, 311 insertions(+), 52 deletions(-)
> 
> -- 
> 2.17.1
>