Comment 3 for bug 1446517

Fix Dell ALC256 headphone Mic recording issue.
Default is pcbeep path for 0x1a input.

> -----Original Message-----
> From: Takashi Iwai [mailto:<email address hidden>]
> Sent: Tuesday, April 21, 2015 6:03 PM
> To: David Henningsson
> Cc: <email address hidden>; Kailang; <email address hidden>;
> <email address hidden>; <email address hidden>
> Subject: Re: [PATCH] ALSA: hda - fix "num_steps = 0" error on ALC256
>
> At Tue, 21 Apr 2015 10:48:46 +0200,
> David Henningsson wrote:
> >
> > The ALC256 does not have a mixer nid at 0x0b, and there's
> no loopback
> > path (the output pins are directly connected to the DACs).
> >
> > This commit fixes an "num_steps = 0 for NID=0xb (ctl = Beep
> Playback Volume)"
> > error (and as a result, problems with amixer/alsamixer).
> >
> > If there's pcbeep functionality, it certainly isn't controlled by
> > setting an amp on 0x0b, so disable beep functionality (at
> least for now).
> >
> > Cc: <email address hidden>
> > BugLink:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1446517
> > Signed-off-by: David Henningsson <email address hidden>
>
> Applied, thanks.
>
>
> Takashi
>
> > ---
> > sound/pci/hda/patch_realtek.c | 5 +++--
> > 1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/sound/pci/hda/patch_realtek.c
> > b/sound/pci/hda/patch_realtek.c index 231d0e4..03975d03 100644
> > --- a/sound/pci/hda/patch_realtek.c
> > +++ b/sound/pci/hda/patch_realtek.c
> > @@ -5664,6 +5664,7 @@ static int patch_alc269(struct
> hda_codec *codec)
> > break;
> > case 0x10ec0256:
> > spec->codec_variant = ALC269_TYPE_ALC256;
> > + spec->gen.mixer_nid = 0; /* ALC256 does not
> have any loopback mixer
> > +path */
> > break;
> > }
> >
> > @@ -5677,8 +5678,8 @@ static int patch_alc269(struct
> hda_codec *codec)
> > if (err < 0)
> > goto error;
> >
> > - if (!spec->gen.no_analog && spec->gen.beep_nid)
> > - set_beep_amp(spec, 0x0b, 0x04, HDA_INPUT);
> > + if (!spec->gen.no_analog && spec->gen.beep_nid &&
> spec->gen.mixer_nid)
> > + set_beep_amp(spec, spec->gen.mixer_nid, 0x04,
> HDA_INPUT);
> >
> > codec->patch_ops = alc_patch_ops;
> > codec->patch_ops.stream_pm = snd_hda_gen_stream_pm;
> > --
> > 1.9.1
> >
>
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