Comment 37 for bug 1365769

http://git.kernel.org/cgit/linux/kernel/git/tiwai/hda-emu.git/tree/codecs/vt1708-clevo-m540se?id=HEAD

let take vt1708 as example
pincap of hp and mic support DETECT but not support unsolicited event and this require to set a timer to send get_pin_sense periodcally when open the playback/capture device

Node 0x20 [Pin Complex] wcaps 0x40010d: Stereo Amp-Out
  Amp-Out caps: ofs=0x1b, nsteps=0x1b, stepsize=0x06, mute=1
  Amp-Out vals: [0x15 0x15]
  Pincap 0x081c: OUT HP Detect
  Pin Default 0x022140f0: [Jack] HP Out at Ext Front
    Conn = 1/8, Color = Green
  Pin-ctls: 0xc0: OUT HP
  Connection: 1
     0x17
Node 0x21 [Pin Complex] wcaps 0x400101: Stereo
  Pincap 0x08334: IN OUT Detect
  Pin Default 0x02a190f0: [Jack] Mic at Ext Front
    Conn = 1/8, Color = Pink
  Pin-ctls: 0x21: IN
  Connection: 1
     0x1b

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_via.c?id=4e2d16d326fd33e3101ddf08730c953b480ec2ef

seem all via codec except vt1708 use unsol event for jack event and power state event

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/sound/pci/hda/hda_jack.c