[alsa-devel] [STAC927x HDA codec] 0x1F function not supported by driver ?

Eric ejaouen at ponctey.fr
Mon Oct 4 14:23:35 CEST 2010

Hi everybody I have some news : bad news but I was prepared to : as of
now the alsa codec driver for STAC9271 is not complete : its ADAT output
(vendor specific function) support is not complete.
I tested with the ADAT output option Matthew Ranostay had added in a
patch ( amixer sset 'IEC958 Playback Source' ADAT )
and also having changed the 0x21 pin default from 014521xx to 015521xx
(4 being spdif out and 5 being digital out) : when doing so "alsactl
restore" responded : unknown hardware HDAintel STAC ; hardware is
initialized using a guess method   (which is possibly normal )
In jack I only had 2 alsa outputs (allways using card0 device 1 : "STAC
Maybe the problem is that ADATout Node 0x1F is not detailled enough in
the driver ?

here is COMPLETE codec datasheet (page185 for 0x1F node ; page 155 for
0x21 digOUT node):

here a alsa-info.sh of me (before changing to 015521xx pin config):


Hoping to get help to at least try to make it work : I bought intel
DP35DP motherboard ONLY for the advertised "ADAToutput feature".
Thanks a lot in advance, 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 ? Many HTPC users would love that... I would !
>>> 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.
>>> Thank you everybody
>>>>> Is the ADAT output of the IDT (sigmatel) STAC927x HDA codec
>> supported in
>>>>> alsa ?
>>>>> If not could someone please try to add this incredibly nice feature
>> in
>>>>> the existing alsa driver ?
>>>> Do you have any HD-audio device with ADAT?
>>>> IIRC, there is no specific verbs for ADAT on STAC927x...
>>>> Takashi

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