[alsa-devel] SigmaTel STAC9221 - Mux Amp-Out > 0x02 == microphone not working

[Ivan N. Zlatev]

Hello,

I am on an iMac ("*imac-20" model/pinconfig) with a Intel HD card with
the SigmaTel STAC9221 codec. I have attached the inital codec info
after modprobe. I am using Alsa HG. Setting the mux gain to a value >
20 (0x02 Amp-Out value) results a non-working microphone. Steps and
codec diffs as follows:

1) initial - microphone working
2) Mux Gain = 10 - microphone working

 Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
   Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
-  Amp-Out vals:  [0x00 0x00]
+  Amp-Out vals:  [0x01 0x01]
   Connection: 7
      0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a

3) Mux Gain = 20 - microphone working

 Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
   Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
-  Amp-Out vals:  [0x01 0x01]
+  Amp-Out vals:  [0x02 0x02]
   Connection: 7
      0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a


4) Mux Gain = 30 - microphone not working

 Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
   Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
-  Amp-Out vals:  [0x02 0x02]
+  Amp-Out vals:  [0x03 0x03]
   Connection: 7
      0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a


4) Mux Gain = 40 - microphone not working

 Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
   Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
-  Amp-Out vals:  [0x03 0x03]
+  Amp-Out vals:  [0x04 0x04]
   Connection: 7
      0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a

Regards
-- 
Ivan N. Zlatev

Web: http://www.i-nZ.net
"It's all some kind of whacked out conspiracy."
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