you need a modified version of
http://git.kernel.org/?p=linux/kernel/git/tiwai/sound.git;a=commitdiff;h=3b315d70b094e8b439358756a9084438fd7a71c2;hp=8871e5b91518a47284b6bc2603b44dbc79c85446
create front , rear, center and lfe playback volume to support 5.1 this
mean that you will loss the headphone playback volume since there are
only 3 DACs
headphone connected to front DAC, blue line in jack and pink mic jack
cabn be retask as output similar to those desktop with three jacks at
fear panel
Node 0x02 [Audio Output] wcaps 0x41d: Stereo Amp-Out
Control: name="Bass Speaker Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x2c 0x2c]
Converter: stream=8, channel=2
PCM:
rates [0x560]: 44100 48000 96000 192000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 EPSS
Power: setting=D0, actual=D0
Node 0x03 [Audio Output] wcaps 0x41d: Stereo Amp-Out
Control: name="Headphone Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x2c 0x2c]
Converter: stream=8, channel=0
PCM:
rates [0x560]: 44100 48000 96000 192000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 EPSS
Power: setting=D0, actual=D0
Node 0x04 [Audio Output] wcaps 0x41d: Stereo Amp-Out
Control: name="Speaker Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Device: name="ALC670 Analog", type="Audio", device=0
Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
Amp-Out vals: [0x2c 0x2c]
Converter: stream=8, channel=0
PCM:
rates [0x560]: 44100 48000 96000 192000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 EPSS
Power: setting=D0, actual=D0
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https://bugs.launchpad.net/bugs/839800
Title:
5.1 built-in surround detected as 4.0 on Acer Aspire 8943G with ALC670
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