[alsa-devel] [PATCH v4 0/9] adapt SOF to use snd-hda-codec-hdmi

[Pierre-Louis Bossart]

On 9/12/19 9:21 AM, Kai Vehmanen wrote:
> Hi all,
> 
> here's the 4th round for this series that adapts SOF to use
> snd-hda-codec-hdmi (patch_hdmi.c) codec driver instead of hdac_hdmi
> (soc/codecs/hdac_hdmi.c). The primary goal is to unify the HDMI codec
> implementation between DSP and non-DSP HDA configurations, offer same
> interface to user-space and reduce maintenance load for all.

The series looks good to me so

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>

I would recommend that we have a matching change for the Skylake driver 
and validation that both SOF and cAVS/SST drivers can operate with this 
mode set. Our goal is still to have coexistence between the two drivers 
in a single build/distro, e.g. cAVS for SKL/KBL/APL and SOF for newer 
platforms. This can be done in a follow-up patch but it needs to be done 
before distros start selecting this common HDMI mode.

The other concern I have is that we have other changes coming for 
soc-acpi and machine drivers to deal with SoundWire, so it'd be nice to 
have the changes mirrored between Mark and Takashi trees e.g. with the 
merge of a fixed branch.

> 
> v4 changes:
> - Change order of patches to not break bisect (Pierre's feedback).
> - Improve the explanation in commit message for
>    mst_no_extra_pcms, patch 1. (Pierre's feedback).
> - Fix errors in PCM constraints for HDMI (Pierre's feedback).
> - Fix an issue on Ice Lake platforms (patch 3).
> 
> Feature and testing info:
>   - Tested on multiple Intel platforms supported by SOF.
>   - Tested with ALSA console tools as well as with Pulseaudio.
>        - requires Pulseaudio 12.x or newer, see
>          https://lists.freedesktop.org/archives/pulseaudio-discuss/2019-August/031358.html
>   - HDMI, DP, DP-MST with multi-monitor use-scenarios work ok.
>   - New feature for SOF: ELD /proc fs works just like in
>     DSP-less mode.
>   - New feature for SOF: jack detection works out-of-the-box
>     with Pulseaudio (no need for card specific UCM for HDMI)
> 
> Kai Vehmanen (9):
>    ALSA: hda/hdmi - implement mst_no_extra_pcms flag
>    ASoC: hdac_hda: add support for HDMI/DP as a HDA codec
>    ASoC: Intel: skl-hda-dsp-generic: use snd-hda-codec-hdmi
>    ASoC: Intel: skl-hda-dsp-generic: fix include guard name
>    ASoC: SOF: Intel: add support for snd-hda-codec-hdmi
>    ASoC: Intel: bxt-da7219-max98357a: common hdmi codec support
>    ASoC: Intel: glk_rt5682_max98357a: common hdmi codec support
>    ASoC: intel: sof_rt5682: common hdmi codec support
>    ASoC: Intel: bxt_rt298: common hdmi codec support
> 
>   include/sound/hda_codec.h                     |   1 +
>   include/sound/soc-acpi.h                      |   2 +
>   sound/pci/hda/patch_hdmi.c                    |  19 +++-
>   sound/soc/codecs/hdac_hda.c                   | 100 +++++++++++++++---
>   sound/soc/codecs/hdac_hda.h                   |  12 ++-
>   sound/soc/intel/boards/bxt_da7219_max98357a.c |  11 ++
>   sound/soc/intel/boards/bxt_rt298.c            |  11 ++
>   sound/soc/intel/boards/glk_rt5682_max98357a.c |  11 ++
>   sound/soc/intel/boards/hda_dsp_common.h       |  93 ++++++++++++++++
>   sound/soc/intel/boards/skl_hda_dsp_common.c   |  10 +-
>   sound/soc/intel/boards/skl_hda_dsp_common.h   |  27 ++++-
>   sound/soc/intel/boards/skl_hda_dsp_generic.c  |   1 +
>   sound/soc/intel/boards/sof_rt5682.c           |  11 ++
>   sound/soc/sof/intel/Kconfig                   |  10 ++
>   sound/soc/sof/intel/hda-codec.c               |  19 +++-
>   sound/soc/sof/intel/hda.c                     |   6 ++
>   sound/soc/sof/intel/hda.h                     |   6 +-
>   17 files changed, 323 insertions(+), 27 deletions(-)
>   create mode 100644 sound/soc/intel/boards/hda_dsp_common.h
>