[alsa-devel] Issues and/or possible bugs in alsa

[Yomi Ogunwumi]

I should have elaborated a bit more on the result of the last case.

No, when I plug in the headphones into the Microphone jack, the headphones
do not work at all. (which makes sense, because it's a mic jack...it would
be expecting a mic, right?)

While alsamixer will correctly raise the headphone output and mute the
speakers (when I plugged the headphones into the mic jack) — no sound comes
through the headphones.

Just to avoid any possible confusion...

Are those more changes I should make to the code?

Headphones unplugged.
Pin 0x18 (Black Mic, Right side): present = No
Pin 0x21 (Black Headphone, Right side): present = No

Headphones plugged into Headphone port.
Pin 0x18 (Black Mic, Right side): present = Yes
Pin 0x21 (Black Headphone, Right side): present = No

Headphones plugged into Mic port.
Pin 0x18 (Black Mic, Right side): present = Yes
Pin 0x21 (Black Headphone, Right side): present = Yes

On Mon, Apr 13, 2015 at 9:20 PM, Raymond Yau <superquad.vortex2 at gmail.com>
wrote:

> >
> > Headphones unplugged.
> > [11:10:44 | yomi at xana ~/software/alsa-tools/hdajacksensetest] » sudo
> ./hdajacksensetest -c 1
> > [sudo] password for yomi:
> > Pin 0x18 (Black Mic, Right side): present = No
> > Pin 0x21 (Black Headphone, Right side): present = No
> >
> > Headphones plugged in.
> > [11:10:50 | yomi at xana ~/software/alsa-tools/hdajacksensetest] » sudo
> ./hdajacksensetest -c 1
> > Pin 0x18 (Black Mic, Right side): present = Yes
> > Pin 0x21 (Black Headphone, Right side): present = No
> >
> > That's odd. It seems to detect my headphones as being plugged into the
> Mic jack. It isn't. It is plugged into the headphone jack. I checked.
> > Haha. If I plug my headphones into the Mic Jack...alsamixer correctly
> mutes the speakers and raises the volume of the headphones output.
> >
> > Headphones plugged into Mic Jack.
> > [11:11:08 | yomi at xana ~/software/alsa-tools/hdajacksensetest] » sudo
> ./hdajacksensetest -c 1
> > [sudo] password for yomi:
> > Pin 0x18 (Black Mic, Right side): present = Yes
> > Pin 0x21 (Black Headphone, Right side): present = Yes
>
> Do you mean headphone and mic work as expected only when both are plugged
> and always fail when headphone or mic is plugged ?
>
> Look  like jack sense circuit of hp and mic are swapped
>
>
> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/hda/hda_jack.c
>
> The current implementation assume kctl return jack state of  the
> corresponding pin complex
>
> Can two pins use the other pin as the gated jack at same time ?
> snd_hda_jack_set_gating_jack()
>
> ALSA: hda - Allow jack state to depend on another jack
>
>
> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/hda_jack.c?id=0619ba8c17b121ef0273be181198659b17d84247
>
> your case seem not just need to  swap the result return by read_pin_sense()
>
>      switch(nid){
>      case 0x18:
>              val = snd_hda_codec_read(codec, 0x21, 0,
>   AC_VERB_GET_PIN_SENSE, 0);
>              break;
>      case 0x21
>              val = snd_hda_codec_read(codec, 0x18, 0,
>   AC_VERB_GET_PIN_SENSE, 0);
>              break;
>      default:
>            val = snd_hda_codec_read(codec, nid, 0,
>   AC_VERB_GET_PIN_SENSE, 0);
>               break;
>      }
>
> but also swap the unsolicited event tag on those two pin complex since the
> driver use jack->tag to determine pin complex
>
> snd_hda_codec_write_cache(codec, nid, 0,
> AC_VERB_SET_UNSOLICITED_ENABLE,
> AC_USRSP_EN | jack->tag);
>
> Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>   Control: name="Mic Boost Volume", index=0, device=0
>     ControlAmp: chs=3, dir=In, idx=0, ofs=0
>   Control: name="Mic Jack", index=0, device=0
>   Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
>   Amp-In vals:  [0x01 0x01]
>   Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>   Amp-Out vals:  [0x80 0x80]
>   Pincap 0x00001734: IN OUT Detect
>     Vref caps: HIZ 50 GRD 80
>   Pin Default 0x04a11030: [Jack] Mic at Ext Right
>     Conn = 1/8, Color = Black
>     DefAssociation = 0x3, Sequence = 0x0
>   Pin-ctls: 0x24: IN VREF_80
>   Unsolicited: tag=02, enabled=1
>   Connection: 1
>      0x0d
>
> Node 0x21 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
>   Control: name="Headphone Playback Switch", index=0, device=0
>     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>   Control: name="Headphone Jack", index=0, device=0
>   Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>   Amp-Out vals:  [0x80 0x80]
>   Pincap 0x0000001c: OUT HP Detect
>   Pin Default 0x04211020: [Jack] HP Out at Ext Right
>     Conn = 1/8, Color = Black
>     DefAssociation = 0x2, Sequence = 0x0
>   Pin-ctls: 0xc0: OUT HP
>   Unsolicited: tag=01, enabled=1
>   Connection: 2
>      0x0c* 0x0dp
>



-- 
*Yomi*