Added the test plan.

** Description changed:

  [Impact]
  No audio input/output for cs42l43 and cs35l56 on Intel LNL of ThinkPad.
  
  [Fix]
  Add the firmware of cs35l56 and sof-lnl-cs42l43-l0-2ch.tplg
  to enable audio support;
  update alsa-ucm-conf to gain the control of mic/speaker mute LED.
  
  linux-fimware commit:
  9c46d10f8 cirrus: cs35l56: Add and update firmware for various Cirrus CS35L54 
and CS35L56 laptops
  
  sof-bin commit:
  e8604e4 Add 2.12 topology binaries for Intel targets
  
  sof-bin file:
  v2.12.x/sof-ipc4-tplg-v2.12/sof-lnl-cs42l43-l0-2ch.tplg
  
  alsa-ucm-conf commits:
  9e946d4 sof-soundwire: Add LED support for cs35l56 amplifiers
  79c9e8f sof-soundwire: cs42l43: Drop headset mic from mic mute LED
  
  [Test]
- Tested on Intel LNL, the audio input/ouput OK, headset detection OK,
- mic/speaker mute LED OK.
+ Tested on Intel LNL:
+ 1, hear the sound from 
+ $ speaker-test -c 2
+ 2, make sound and recorded, replay the file:
+ $ arecord -f cd test.wav
+ $ aplay test.wav
+ 3, press speaker-mute and mic-mute key, the OSD are shown,
+ and the LED is on when it's muted.
+ 4, plugin headset and restest the steps above.
  
  [Where problems could occur]
  It may break cirrus audio support.
  
  Noble/Oracular/Plucky support this platform,  Plucky already got the
  firmware.

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https://bugs.launchpad.net/bugs/2106394

Title:
  [SRU] enable cs42l43 and cs35l56 audio on Intel LNL

Status in HWE Next:
  New
Status in alsa-ucm-conf package in Ubuntu:
  Fix Committed
Status in firmware-sof package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  New
Status in linux-firmware package in Ubuntu:
  In Progress
Status in alsa-ucm-conf source package in Noble:
  Fix Committed
Status in firmware-sof source package in Noble:
  Incomplete
Status in linux source package in Noble:
  Won't Fix
Status in linux-firmware source package in Noble:
  Fix Committed
Status in alsa-ucm-conf source package in Oracular:
  Fix Committed
Status in firmware-sof source package in Oracular:
  Incomplete
Status in linux source package in Oracular:
  Fix Committed
Status in linux-firmware source package in Oracular:
  Fix Committed
Status in alsa-ucm-conf source package in Plucky:
  New
Status in firmware-sof source package in Plucky:
  Fix Released
Status in linux source package in Plucky:
  New
Status in linux-firmware source package in Plucky:
  New

Bug description:
  [Impact]
  No audio input/output for cs42l43 and cs35l56 on Intel LNL of ThinkPad.

  [Fix]
  Add the firmware of cs35l56 and sof-lnl-cs42l43-l0-2ch.tplg
  to enable audio support;
  update alsa-ucm-conf to gain the control of mic/speaker mute LED.

  linux-fimware commit:
  9c46d10f8 cirrus: cs35l56: Add and update firmware for various Cirrus CS35L54 
and CS35L56 laptops

  sof-bin commit:
  e8604e4 Add 2.12 topology binaries for Intel targets

  sof-bin file:
  v2.12.x/sof-ipc4-tplg-v2.12/sof-lnl-cs42l43-l0-2ch.tplg

  alsa-ucm-conf commits:
  9e946d4 sof-soundwire: Add LED support for cs35l56 amplifiers
  79c9e8f sof-soundwire: cs42l43: Drop headset mic from mic mute LED

  [Test]
  Tested on Intel LNL:
  1, hear the sound from 
  $ speaker-test -c 2
  2, make sound and recorded, replay the file:
  $ arecord -f cd test.wav
  $ aplay test.wav
  3, press speaker-mute and mic-mute key, the OSD are shown,
  and the LED is on when it's muted.
  4, plugin headset and restest the steps above.

  [Where problems could occur]
  It may break cirrus audio support.

  Noble/Oracular/Plucky support this platform,  Plucky already got the
  firmware.

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