[alsa-devel] intel DP35DP adat supported (STAC927x codec) ?

Eric ejaouen at ponctey.fr
Tue Mar 31 03:53:28 CEST 2009

Hi all, I bought motherboards intel DP35DP and DG33TL and just tried
ADAT output in Alsa (ADAT output on them is proven to work under windows).
I wrote the command (thanks to the work of Matthew for the 'IEC958
Playback Source' control.28 setting) :
amixer sset 'IEC958 Playback Source' ADAT

Here is my resulting alsainfo:

It still does not work
I think the reason is that contrary to the windows driver the
Node 0x21 is still unchanged :
Pin Default 0x01452150: [Jack] SPDIF Out
whereas it should be better with :

How can I change my computer from the Pin default config to this
alternative Pin config ?

Anybody has any other idea to help ?
Thanks a lot, Eric

> Hi Steven,
> I have studied the hd audio documents :
> Please make sure the pin default is actually 015521xx when in ADAT mode
> (instead of config default 014521xx ) .
> Please copy me your alsainfo script if it still does not work.
> Matthew Ranostay is right : really not much is missing or wrong for ADAT
> to work.
> Thanks everybody for future help, Eric
> Tellman, Steven a écrit :
>> It doesn't work. The option comes up, but no dice. Doesn't lock to the
>> receiver that has ADAT support.

>> Hello Eric,
>> You should run the latest ALSA from the git tree because I added a codec
>> specific SPDIF output control control for that chipset.
>> ....
>>  417 static const char *stac927x_spdif_labels[5] = {
>>  418     "Digital Playback", "ADAT", "Analog Mux 1",
>>  419     "Analog Mux 2", "Analog Mux 3"
>>  420 };
>> ....
>> I haven't tested ADAT output though but I have no reason to
>> think it wouldn't work.
>> Thanks,
>> Matt Ranostay
>> Eric wrote:
>>> In their handbook, motherboard intel DP35DP and others with STAC927x
>> (in
>>> the codec datasheet also ADAT output is featured on older sigmatel
>>> STAC9271 and now IDT STAC9274 only) advertise ADAT output possible on
>>> their toslink.
>>> DP35DP and other intel boards are proven to have the ADAT output
>> working
>>> under windows.
>>> Is it working in Alsa ?>>>
>>> Anybody from intel or IDT/sigmatel to confirm (by checking the
>> sigmatel
>>> STAC927x hda codec driver) that it will work ?
>>> I want these intel motherboards only for this ADAT output feature and
>> I
>>> am a linux only user so I would like to know before buying...
>>> I want to be sure someone would make the necessary changes to the hda
>>> sigmatel codec alsa driver so it would work.

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