[Bug 2006102] Re: Mic Mute LED doesn't work on Soundwire laptops

[Andy Chi]

** Changed in: oem-priority
       Status: Confirmed => Fix Committed

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https://bugs.launchpad.net/bugs/2006102

Title:
  Mic Mute LED doesn't work on Soundwire laptops

Status in OEM Priority Project:
  Fix Committed
Status in alsa-ucm-conf package in Ubuntu:
  New
Status in alsa-ucm-conf source package in Jammy:
  New
Status in alsa-ucm-conf source package in Kinetic:
  New
Status in alsa-ucm-conf source package in Lunar:
  New

Bug description:
  Pull request:
  https://github.com/alsa-project/alsa-ucm-conf/pull/261

  [Impact]
  Mic mute LED doesn't work on Intel-based Dell laptops.

  [Fix]
  Due to recent change on how kernel creates sound LEDs, there are two captures are registered, one from SoF and one from HDA. The SoF one is the "real" capture system uses.

  Since physical LED only gets light up when _all_ captures are muted,
  detach the HDA one so micmute LED only need to consider SoF capture's
  mute status.

  [Test]
  The mic mute LED works again on Soundwire laptops.

  The legacy HDA/DMIC systems are unaffected.

  [Where problems could occur]
  Theoretically the system may have more than two internal captures registered, then disabling one will not be enough.

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