Public bug reported:

[Impact]
The external can't be detected when plugging headset in the
front audio jack.

[Fix]
apply the alc891 fixup to set headset-mic and headpphone-mic pins.

[Test Case]
apply this patch and boot with the kernel, plug the headset-mic
and choose headset-mic from popup dialogue, the headset-mic can
record sound very well.

[Regression Risk]
Low. this patch is specific to a dell machine by pin configuration
definition.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: High
     Assignee: Hui Wang (hui.wang)
         Status: Incomplete


** Tags: originate-from-1835695 somerville

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Tags added: originate-from-1835695 somerville

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https://bugs.launchpad.net/bugs/1836755

Title:
  hda/realtek: can't detect external mic on a Dell machine

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