Comment 199 for bug 1332900

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/hda

patch_realtek.c

don't need patch or any model after you recompile alsa driver since the subwoofer pin and headset mic pin will be added by the driver as

/sys/class/sound/hwC0D0/driver_pin_configs:

the driver create capture source control which have three selections

internal mic, headset mic and external mic

those TRS headphone still support when you select internal mic

TRRS headset is supported when you select headset mic

don't plug external mic and headset at the same time when you select external mic as capture source

the driver logic still assume the jack is headphone