This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
eoan' to 'verification-done-eoan'. If the problem still exists, change
the tag 'verification-needed-eoan' to 'verification-failed-eoan'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-eoan

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https://bugs.launchpad.net/bugs/1848490

Title:
  eoan: alsa/sof: Enable SOF_HDA link and codec

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Eoan:
  Fix Committed

Bug description:

  [Impact]
  We tested the EOAN kernel on the LENOVO or Dell machines which have
  dmic directly connnected to PCH, the dmic didn't work.

  [Fix]
  We need to enable SOF_HDA link and codec, then the sof driver
  and Legacy HDA driver work together to make the dmic work.

  [Test Case]
  Install the latest 19.10 image, build a new kernel with this
  patch and replace the existing kernel, After installing the blacklist
  package (blacklist snd_hda_intel and snd_soc_skl) and ucm package,
  the dmic and all output devices (speaker/hdmi) work.

  [Regression Risk]
  Low, these configs are already enabled in the oem-b-osp1 kernel
  for a long time, and we tested it on many lenovo/dell machines witch
  have or have no dmic, all worked well.

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