[alsa-devel] Thinkpad T400 - internal mic doesn't work, can't set CAPTURE - schematics included

[Raymond Yau]

2013-3-1 上午1:23 於 "Arkadiusz Miśkiewicz" <arekm at maven.pl> 寫道：
>
> On Thursday 28 of February 2013, David Henningsson wrote:
> > On 02/27/2013 06:58 PM, Arkadiusz Miśkiewicz wrote:
> > > Hi,
> > >
> > > My Thinkpad T400 (2764CTO model) doesn't have ability to set CAPTURE
on
> > > microphone inputs with alsa. Most likely some quirk is missing.
> > >
> > > The laptop has internal microphone, microphone in input, headphones
out
> > > output and 2 internal speakers. That's all.
> > >
> > > Is uses Conexant CX20561_15Z internally and there is detailed T400
> > > schematic available:
> > > http://kythuatphancung.com/download/lenovo-thinkpad-t400-schematic-
> > > diagram.html?dl
> > > (for audio look around page 43).
> > >
> > > Kernels 3.7.x, fresh 3.8 - no luck. Tried even linux-next from today
but
> > > it dies early on alsa unrelated issues.
> > >
> > > I've tried model options laptop, hp, hp-dv6736, hp-700, toshiba,
ideapad,
> > > auto. None of these work fine. With model=hp-700 I can set CAPTURE
but it
> > > doesn't work (silent audio is captured using arecord or in google
> > > hangout). External mic connected also doesn't work with these setups.
> > >
> > >
http://www.alsa-project.org/db/?f=394ff4cdca33e75c8a47203d42b89d8de36deca
> > > 7 [3.8 kernel]
> > >
> > >
http://www.alsa-project.org/db/?f=302877e50f99835075d038207f6db0dfd89873b
> > > 0 [3.7 kernel]
> > >
> > > Thinkpad is 2764CTO model exactly.
> > >
> > > I can test various hacks, patches etc easily. Could someone look at
> > > schematic and provide quirks to test?
> >
> > Hi,
> >
> > What do you mean with "doesn't have ability to set CAPTURE"?
>
> On some other notebook I had mic input that I could set to CAPTURE mode
using
> space in alsamixer F4: Capture menu. Here I can't set capture on any of
inputs
> (pressing space causes no change).
>
> > What input
> > is used is automatically selected depending on what you have plugged in,
> > and its level is set using mixer controls (which in your alsa-info is
> > set to minimum levels).
>
> There are two jack sockets in this laptop, one with headphones icon and
other
> with mic icon (on the laptop case itself) as on this photo:
> http://www.notebookreview.com/shared/picture.asp?f=42200
>
> Ok... maxing all mixer controls and connecting external microphone I get
> external mic being recorded. The mixer controls that seem to be working in
> such mode are: "Mic", "Mic boost" and "Digital". What's weird is that when
> "Digitial" is set to 0 then no sound from microphone is being recorded
> (testing with arecord -f cd | aplay). The "Mic" and "Mic boost" seems to
work
> as expectedf. Question: why "Digital" has any influence here?
>
> Unfortunately I'm unable to get internal microphone working at all. Even
with
> all outputs set to maximum like this:
>
> http://www.alsa-project.org/db/?f=9a7e1ca68b2f2fa2f77dce6ead2b5fb158b74652
>
> Internal mic is my primary problem.
>

Do you mean dynamic adc switch does not work as expected or "Dock mic
capture volume" and "internal Michael capture volume" controls cannot share
the same amp in ?

Node 0x14 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
  Control: name="Dock Mic Capture Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Control: name="Internal Mic Capture Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Device: name="CONEXANT Analog", type="Audio", device=0
  Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=0
  Amp-In vals:  [0x50 0x50] [0x50 0x50]
  Converter: stream=4, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3
  Power: setting=D0, actual=D0
  Connection: 2
     0x1d* 0x17
Node 0x15 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
  Control: name="Mic Capture Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=0
  Amp-In vals:  [0x50 0x50]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3
  Power: setting=D0, actual=D0
  Connection: 1
     0x18