[PATCH 0/1][SRU][L/OEM-6.0] Fix headset mic not working issue on Dell Latitude 5340

[Chris Chiu]

BugLink: https://bugs.launchpad.net/bugs/2002013

[SRU Justification]

[Impact]
The Dell Latitude 5430 with Realtek audio codec ALC3254 fail to detect the headphone microphone and thus unable to record audio.

[Fix]
The realtek audio quirk ALC269_FIXUP_DELL4_MIC_NO_PRESENCE is required since the NID used for headphone microphone should be 0x1b instead of 0x1a, which is used for former ALC225/295 variants.

[Test Case]
1. Plug in the headphone microphone on the problematic Dell Latitude 5430 laptop
2. Make sure it's detected in Audio Settings. (pulseaudio)
3. Record the sound via the headphone microphone and check the recorded content.

[Where problems could occur]
No. Since the audio fixup is only applied on the machine with particular subsystem ID.

[Other Info]
This is not yet available in mainline kernel but in linux-next, and need to be applied after SRU lp:2000909

Chris Chiu (1):
  ALSA: hda - Enable headset mic on another Dell laptop with ALC3254

 sound/pci/hda/patch_realtek.c | 1 +
 1 file changed, 1 insertion(+)

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2.25.1