[alsa-devel] [PATCH] ALSA: hda/realtek - There is no loopback mixer in the ALC234/274/294

[Takashi Iwai]

On Mon, 26 Jun 2017 06:30:32 +0200,
Hui Wang wrote:
> 
> We have a Lenovo machine with the codec ALC294 on it, without the
> patch, the Node 0x0b is regarded as the loopback mixer, but the Node
> 0x0b in this codec is "Vendor Defined Widget" instead of the audio
> mixer, please see the log below:
> 
> Node 0x0b [Vendor Defined Widget] wcaps 0xf00000: Mono
>   Control: name="Beep Playback Volume", index=0, device=0
>     ControlAmp: chs=3, dir=In, idx=4, ofs=0
>   Control: name="Beep Playback Switch", index=0, device=0
>     ControlAmp: chs=3, dir=In, idx=4, ofs=0
> 
> And I have consulted with Realtek, so far the ALC234/274/294 all don't
> have loopback mixer.
> 
> Cc: Kailang Yang <kailang at realtek.com>
> Signed-off-by: Hui Wang <hui.wang at canonical.com>

Applied, thanks.


Takashi

> ---
>  sound/pci/hda/patch_realtek.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
> index c4a1b49..bc00a37 100644
> --- a/sound/pci/hda/patch_realtek.c
> +++ b/sound/pci/hda/patch_realtek.c
> @@ -6696,6 +6696,7 @@ static int patch_alc269(struct hda_codec *codec)
>  	case 0x10ec0274:
>  	case 0x10ec0294:
>  		spec->codec_variant = ALC269_TYPE_ALC294;
> +		spec->gen.mixer_nid = 0; /* ALC2x4 does not have any loopback mixer path */
>  		alc_update_coef_idx(codec, 0x6b, 0x0018, (1<<4) | (1<<3)); /* UAJ MIC Vref control by verb */
>  		break;
>  	case 0x10ec0700:
> -- 
> 2.7.4
>