[alsa-devel] [PATCH 1/2] ALSA: hda - Create capture source ctls when stereo mix input is added

[Raymond Yau]

>
> When the stereo mix input is explicitly enabled via a user hint, the
> driver should create always a capture source enum ctl and disable the
> auto-mic switch.  Otherwise the behavior gets confused.  For doing it,
> this patch just sets spec->suppress_auto_mic flag appropriately.
>

As your patch allow notebook to use stereo mix by hint , does it mean that
those audio mixer which only have input from audio output but no mic or
line input can be also enabled on notebook by hint ?

https://bugzilla.kernel.org/attachment.cgi?id=144111

Node 0x14 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
  Control: name="Capture Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Control: name="Capture Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Device: name="CX20590 Analog", type="Audio", device=0
  Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
  Amp-In vals:  [0x50 0x50] [0x80 0x80] [0x50 0x50] [0x80 0x80]
  Converter: stream=1, 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 D3cold EPSS
  Power: setting=D0, actual=D0
  Connection: 4
     0x17 0x18 0x23* 0x24

Node 0x24 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
  Amp-In caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Power states:  D0 D1 D2 D3 D3cold EPSS
  Power: setting=D0, actual=D0
  Connection: 2
     0x10 0x11