[alsa-devel] to support STAC927x ADATout (intel hda mobo)

Eric ejaouen at ponctey.fr
Sun Apr 5 00:19:37 CEST 2009

Hi again,
Please any developper try to make ADAT output feature of sigmatel/IDT
STAC927x codecs (used on most intel HDA media and extreme boards)
actually work in ALSA.
ADAT is a great feature and I am an ALSAonly user so I really need your

here is the codec datasheet

Can some of you read the 0x1f ADATout converter (page185-188) and 0x21
digitalOUT pin complex (page155-159) and compare them with the sigmatel
alsa driver and sigmatel stac927x patch to see what controls are still
missing ?

I can test your work and more...
I will help as much as I can,
thanks in advance, Eric

> 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:
> www.alsa-project.org/db/?f=cb01bf4f7bc62fe69f36bc1a4bbc0dbcace20605
> 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 :
> 		0x01552150
> How can I change my computer from the Pin default config to this
> alternative Pin config ?
> 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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