Re: AC97 codec odd behaviour (STAC9708/11) / Aureal Card IS SUPPORTED!

[Raymond <rayau@netvigator.com>]

Takashi Iwai wrote:
> At 12 Jun 2003 17:51:50 -0400,
> Manuel Jander wrote:
> 
>>Hi everyone,
>>
>>I'm facing some odd things with a Aureal MX300 with a
>>AC97 codec. For some reason the AC97 interface doesnt
>>set the EAPD (external amp enable) bit correctly, and i have 
>>to set it explicitly after calling the ac97  mixer initializer.
>>
>>Maybe, that the AC97 codec write function actually implemented
>>for the Aureal cards "misses" some writes, but i just want to be sure
>>if this bit works for other cards with a STAC9708/11 or similar
>>codec that need this bit by default, or if i really need to set it
>>myself ??
> 
> 
> i recommend you to do this in the card driver level.
> 
> the use of EAPD is dependent upon the devices.  also, some uses EAPD
> pin for different purposes...
> 
> 
> 
According to datasheet of STAC9708, the general purpose register (0x20)
has 3D, MIX, MS, LPBK bits.

Is "POP" a undocumented feature of STAC9708 ?

Simple mixer control 'PCM Out Path & Mute',0
   Capabilities: enum
   Items: 'pre 3D' 'post 3D'
   Item0: 'post 3D'

0-0/0: SigmaTel STAC9708,11

Capabilities     : -headphone out-
DAC resolution   : 18-bit
ADC resolution   : 18-bit
3D enhancement   : SigmaTel 3D Enhancement

Current setup
Mic gain         : +0dB [+0dB]
POP path         : post 3D        <-------------------------
Sim. stereo      : off
3D enhancement   : off
Loudness         : off
Mono output      : MIX
Mic select       : Mic1
ADC/DAC loopback : off
Extended ID      : codec=0 rev=0 SDAC DSA=0
Extended status  : SDAC

numid=43,iface=MIXER,name='PCM Out Path & Mute'
   ; type=ENUMERATED,access=rw---,values=1,items=2
   ; Item #0 'pre 3D'
   ; Item #1 'post 3D'
   : values=0


STAC9708 on other sound cards such as Soundblaster 4.1

http://thread.gmane.org/gmane.linux.alsa.devel/4818




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