[PATCH 0/2][SRU][U/OEM-5.13/OEM-5.14] Fix headphone microphone function for particular Dell laptops

[Chris Chiu]

BugLink: https://bugs.launchpad.net/bugs/1947092

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

[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 particular 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 quirk only affect the machine with particular subsystem ID.

Chris Chiu (1):
  ALSA: hda - Enable headphone mic on Dell Latitude laptops with ALC3254

John Liu (1):
  ALSA: hda/realtek: Enable 4-speaker output for Dell Precision 5560
    laptop

 sound/pci/hda/patch_realtek.c | 3 +++
 1 file changed, 3 insertions(+)

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2.25.1