This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1906738

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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Packages, which is subscribed to linux-oem-5.10 in Ubuntu.
https://bugs.launchpad.net/bugs/1906738

Title:
  alsa/sdw: add support for tgl_3_in_1_sdca soundwire machine

Status in HWE Next:
  Fix Released
Status in linux package in Ubuntu:
  Incomplete
Status in linux-oem-5.10 package in Ubuntu:
  Invalid
Status in linux source package in Focal:
  Invalid
Status in linux-oem-5.10 source package in Focal:
  Fix Released
Status in linux source package in Impish:
  Incomplete
Status in linux-oem-5.10 source package in Impish:
  Invalid

Bug description:
  [Impact]
  We need to enable a Dell soundwire machine in the OEM project, but
  the soundwire design is different from previous generation, it follows
  soundwire sdca spec. both ubuntu kernel and upstream kernel don't have
  driver for soundwire sdca yet, so the audio device on this machine
  can't be detected.

  [Fix]
  backport 20 patches from the kernel git tree of intel sof/project

  [Test]
  After booting up, we could see the sound card by running
  pacmd list-cards, and there is speaker, headphone, dmic and headset-mic
  on this sound card, test playback and record, all worked well.

  [Where problems could occur]
  The patches change some soundwire bus driver and alsa intel asoc
  machine driver, it could make the sound stop working on old
  soundwire machines. But this possibility is very low since we
  tested these patches on Dell soundwire machines.

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