[alsa-devel] Trying to enable digital audio output - Intel HDA - AD1983

[Raymond Yau]

> I have a Lenovo M55 SFF desktop I use for a media center computer
> (XBMCbuntu). It has the AD1983 chip on it. From the factory, it had 2
> ports in the back (mic + speaker) , and 2 ports in the front (mic +
> speaker). It also has an on-board speaker.
>
> It never shipped with a SPDIF output, but I soldered a wire to the
> AD1983 and installed an RCA jack on the back of the case. Earlier
> versions of XBMC shipped with a different version of alsa, and I was
> able to use this custom SPDIF output without issue for the last year
> or two, but the current version only enables the 'proper'
> inputs/outputs
>
> I have tried editing the module options and specifying several
> different models, but the documentation doesn't list any 'model'
> options for the AD1983.
>
> I suspect I need to overwrite the pin configs.
> cat init_pin_configs:
> 0x05 0x01014010
> 0x06 0x0221401f
> 0x07 0x991301f0
> 0x08 0x02a19020
> 0x09 0x0181302e
> 0x0a 0x414511f0

Node 0x0a [Pin Complex] wcaps 0x400301: Stereo Digital
  Pincap 0x00000010: OUT
  Pin Default 0x414511f0: [N/A] SPDIF Out at Ext Rear
    Conn = Optical, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x02

Use hda-jack-retask or early patching to change pin default of node 0x0a
from [N/A] to [JACK]