Comment 1 for bug 1757584

The patch is in the mainline kernel now.

commit ae104a21e52b1f9aab342cf6924405177b720069
Author: Kailang Yang <email address hidden>
Date: Mon Feb 5 16:07:20 2018 +0800

    ALSA: hda/realtek - Add headset mode support for Dell laptop

    This platform was only one phone Jack.
    Add dummy lineout verb to fix automute mode disable.
    This just the workaround.

    [ More background information:
      since the platform has only a headphone jack without speaker, the
      driver doesn't create the auto-mute control. Meanwhile we do update
      the headset mode via the automute hook in the driver, thus with this
      setup, the headset won't be updated any longer.

      By adding a dummy line-out pin here, the auto-mute is added by the
      driver, and the headset update is triggered properly.

      Note that this is different from the other
      ALC274_FIXUP_DELL_AIO_LINEOUT_VERB, which has the real line-out pin,
      while this quirk adds a dummy line-out pin. -- tiwai ]

    Signed-off-by: Kailang Yang <email address hidden>
    Cc: <email address hidden>
    Signed-off-by: Takashi Iwai <email address hidden>