Re: [PATCH V1 4/4] ALSA: hda/realtek: fix mic jack detect failed on alc256

[Takashi Iwai <tiwai@suse.de>]

On Tue, 01 Jul 2025 05:28:39 +0200,
Joakim  Zhang wrote:
> 
> 
> Hello Kailang,
> 
> I'd like to insert another question through this. That would be appreciated if you could have a look.
> 
> After system boot, we can see the default mixer status as below:
> 
> root@cix-localhost:~# amixer -c 0 contents
> numid=14,iface=CARD,name='Headphone Jack'
>   ; type=BOOLEAN,access=r-------,values=1
>   : values=on
> numid=12,iface=CARD,name='Internal Mic Phantom Jack'
>   ; type=BOOLEAN,access=r-------,values=1
>   : values=on
> numid=13,iface=CARD,name='Mic Jack'
>   ; type=BOOLEAN,access=r-------,values=1
>   : values=on
> numid=15,iface=CARD,name='Speaker Phantom Jack'
>   ; type=BOOLEAN,access=r-------,values=1
>   : values=on
> numid=11,iface=MIXER,name='Master Playback Switch'
>   ; type=BOOLEAN,access=rw------,values=1
>   : values=on
> numid=10,iface=MIXER,name='Master Playback Volume'
>   ; type=INTEGER,access=rw---R--,values=1,min=0,max=87,step=0
>   : values=60
>   | dBscale-min=-65.25dB,step=0.75dB,mute=0
> numid=2,iface=MIXER,name='Headphone Playback Switch'
>   ; type=BOOLEAN,access=rw------,values=2
>   : values=on,on
> numid=1,iface=MIXER,name='Headphone Playback Volume'
>   ; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0
>   : values=87,87
>   | dBscale-min=-65.25dB,step=0.75dB,mute=0
> numid=9,iface=MIXER,name='Mic Boost Volume'
>   ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
>   : values=0,0
>   | dBscale-min=0.00dB,step=10.00dB,mute=0
> numid=7,iface=MIXER,name='Capture Switch'
>   ; type=BOOLEAN,access=rw------,values=2
>   : values=on,on
> numid=6,iface=MIXER,name='Capture Volume'
>   ; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
>   : values=39,39
>   | dBscale-min=-17.25dB,step=0.75dB,mute=0
> numid=5,iface=MIXER,name='Auto-Mute Mode'
>   ; type=ENUMERATED,access=rw------,values=1,items=2
>   ; Item #0 'Disabled'
>   ; Item #1 'Enabled'
>   : values=1
> numid=8,iface=MIXER,name='Internal Mic Boost Volume'
>   ; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
>   : values=0,0
>   | dBscale-min=0.00dB,step=10.00dB,mute=0
> numid=4,iface=MIXER,name='Speaker Playback Switch'
>   ; type=BOOLEAN,access=rw------,values=2
>   : values=off,off
> numid=3,iface=MIXER,name='Speaker Playback Volume'
>   ; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0
>   : values=0,0
>   | dBscale-min=-65.25dB,step=0.75dB,mute=0
> numid=17,iface=PCM,name='Capture Channel Map'
>   ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
>   : values=0,0
>   | container
>     | chmap-fixed=FL,FR
> numid=16,iface=PCM,name='Playback Channel Map'
>   ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
>   : values=0,0
>   | container
>     | chmap-fixed=FL,FR
> 
> It can auto switch 'Headphone Playback Switch'/'Headphone Playback Volume' and
> 'Speaker Playback Switch'/'Speaker Playback Volume', when I plugin the headset or not,
> but I have not found the related logic, could you please help clarify a bit?

Isn't it "Auto-Mute Mode"?  If it's set, the speaker is muted
automatically when the headphone/headset jack is plugged by the kernel
driver itself.


Takashi