** Description changed:

+ [Impact]
+ On this Dell machine (codename: turtle bay), the microphone always shows up
+ in the sound-setting even there is no microphone plugged in.
  
- Additional information:
- SKU: TURTLEBAY-DVT2-C1/TURTLEBAY-DVT2-C2/TURTLEBAY-DVT2-C3
- BIOS: 0.3.0
- Manifest: dell-bto-xenial-turtle-bay-X29-20180323-18.iso
+ [Fix]
  
- Image: somerville-xenial-amd64-
+ Without this fix, the pin will be regarded as microphone, and the jack name
+ is "Mic Phantom", it is always on in the pulseaudio even nothing is plugged
+ into the jack. So the UI is confusing to users since the microphone always
+ shows up in the UI even there is no microphone plugged.
+ 
+ After adding this flag, the jack name is "Headset Mic Phantom", then
+ the pulseaudio can handle its detection correctly.
+ 
+ 
+ [Test Case]
+ After booting up the system, and without plugging anything in the audio combo
+ jack, there is nothing in the input tab of sound-setting, then plug a headset
+ in the jack, the what-did-you-plug-in dialogue pops up, users can select 
headset
+ mic from UI, and headset-mic shows up in the sound-setting, we can record 
sound
+ via headset-mic
+ 
+ 
+ [Regression Potential]
+ Very low, since this patch is specific for ALC255_FIXUP_DELL_HEADSET_MIC 
which is
+ only used by Dell precision 3630 by now.

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https://bugs.launchpad.net/bugs/1766398

Title:
  set PINCFG_HEADSET_MIC to parse_flags for Dell precision 3630

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