Comment 7 for bug 1509950

Node 0x02 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L
  Control: name="Speaker+LO Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="Speaker+LO Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Device: name="STAC9221 A1 Analog", type="Audio", device=0
  Amp-Out caps: N/A
  Amp-Out vals: [0x79 0x79]
  Converter: stream=5, channel=0
  Power states:
  Power: setting=D0, actual=D0
  Delay: 13 samples
Node 0x03 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L
  Amp-Out caps: N/A
  Amp-Out vals: [0xff 0xff]
  Converter: stream=0, channel=0
  Power states:
  Power: setting=D0, actual=D0
  Delay: 13 samples
Node 0x04 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L
  Amp-Out caps: N/A
  Amp-Out vals: [0xff 0xff]
  Converter: stream=0, channel=0
  Power states:
  Power: setting=D0, actual=D0
  Delay: 13 samples
Node 0x05 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L
  Control: name="Headphone Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="Headphone Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Amp-Out caps: N/A
  Amp-Out vals: [0x80 0x80]
  Converter: stream=5, channel=0
  Power states:
  Power: setting=D0, actual=D0
  Delay: 13 samples

if there are two headphone jacks, there should be two headphone playback volume control ans switches

speaker playback volume and center/lfe volume when line in is retasked as output to support 5.1 as your codec are 8 channels