[Bug 2042902] Re: ucm2: soundwire: add rt713 SDCA device

[Christian Ehrhardt ]

I got a ping on patch pilot duty, sadly on my ping back if they would be
available for questions if I find more that needs to be sorted out was
unanswered. So I need to carry all into this bug.

This is kind of a log of my own understanding process, feel free to ignore it:
Proposed change:
- It adds a few regex expressions to allow matching the new HW
- and then configuration for those new matches
- Accepted upstream
- Other than fixup releases Upstream seems to tag two releases per year, one in Q2 one in Q4
  - Due to that I'd this to be in a new revision v1.2.11 by May 2024
  - that might be worth to mention for packages to know when they will be able to drop it

Paride and Athos guided you to correctly obey the usual "fix -devel first" rule
and due to noble being new that you need to start there.

We are adding one particular device, but I see that due to having added
Ubuntu delta in the past we have not yet picked up 1.2.10 which would have
picked up plenty of other fixes and devices.
=> https://github.com/alsa-project/alsa-ucm-conf/releases/tag/v1.2.10

alsa-ucm-conf | 1.2.10-1      | unstable   | source, all
alsa-ucm-conf | 1.2.9-1ubuntu3     | noble         | source, all

The SRU fix is fine, those are meant to be surgical based on the need of our
users, but for noble it feels we should aim for 1.2.10 + this.
Checking who usually did that, ah Jürg and Ethan - fine we can ask them
for opinions as they might know the subject matter.

Great, so I'd propose we combine a merge of 1.2.10 with your fix on top.

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https://bugs.launchpad.net/bugs/2042902

Title:
  ucm2: soundwire: add rt713 SDCA device

Status in OEM Priority Project:
  In Progress
Status in alsa-ucm-conf package in Ubuntu:
  Fix Committed
Status in alsa-ucm-conf source package in Jammy:
  New
Status in alsa-ucm-conf source package in Lunar:
  New
Status in alsa-ucm-conf source package in Mantic:
  New
Status in alsa-ucm-conf source package in Noble:
  Fix Committed

Bug description:
  [ Impact ]
  Affects devices with SoundWire-Audio Codec-ALC713 and SoundWire-Jack Codec-ALC713.
  Without correct configurations in userspace above codecs cannot be used. Thus in Settings > Sound > Output test doesn't produce sounds and Input device is greyed out.

  [ Fix ]
  Adding rt713 config files in ucm2 will allow to utilize those codecs.
  Upstream commit added support: https://github.com/alsa-project/alsa-ucm-conf/pull/363

  [ Test Plan ]
  Device with the soundwire card

  $ cat /proc/asound/cards
   0 [sofsoundwire   ]: sof-soundwire - sof-soundwire
                        Intel Soundwire SOF

  Before fix:

  1. $ alsactl init
  alsa-lib utils.c:364:(uc_mgr_config_load_into) could not open configuration file /usr/share/alsa/ucm2/sof-soundwire/rt713.conf
  alsa-lib parser.c:77:(uc_mgr_config_load_file) error: failed to open file /usr/share/alsa/ucm2/sof-soundwire/rt713.conf: -2
  alsa-lib main.c:1412:(snd_use_case_mgr_open) error: failed to import hw:0 use case configuration -2
  Found hardware: "sof-soundwire" "Intel Meteorlake HDMI" "HDA:8086281d,80860101,00100000 cfg-spk:2 cfg-amp:2 hs:rt713-sdca spk:rt1316 mic:rt713-dmic" "" ""
  Hardware is initialized using a generic method

  2. $ amixer contents
  ...
  numid=24,iface=MIXER,name='Headphone Switch'
    ; type=BOOLEAN,access=rw------,values=1
    : values=off
  ...
  numid=33,iface=MIXER,name='IEC958 Playback Switch'
    ; type=BOOLEAN,access=rw------,values=1
    : values=off

  After fix: after adding patch files

  1. $ alsactl init
  alsa-lib main.c:779:(execute_sequence) exec '/bin/rm -rf /var/lib/alsa/card0.conf.d' failed (exit code 1)

  (note: assuming that failed to remove the empty directory is not a
  critical problem)

  2. $ amixer contents
  ...
  numid=24,iface=MIXER,name='Headphone Switch'
    ; type=BOOLEAN,access=rw------,values=1
    : values=on
  ...
  numid=33,iface=MIXER,name='IEC958 Playback Switch'
    ; type=BOOLEAN,access=rw------,values=1
    : values=on

  [Where problems could occur]

   * This change adds new hardware support.

   * The change only adds new hardware support,
     it will not affect other codec device.

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