SPDIF out with HDA/Conexant 20561?

[pl bossart <bossart.nospam@gmail.com>]

Has anyone had any luck enabling S/PDIF output with the Conexant 20561/ctx5051?

On my Lenovo W500 I see a digital output device, I can play on it but
I can't hear any sound on my receiver. There was a patch by Takashi
earlier this year to correct a wrong nodeID
(03b515c45e2a93331d2ac9dc1c16440f7fa313ec, ALSA: hda - Fix SPDIF
output widget for Cxt5051 codec), so I figure some amount of testing
has been done already?

I wonder if this comes from a non-initialized pin configuration as
reported in /proc/asound/card0/codec#0?
Node 0x1c [Pin Complex] wcaps 0x400701: Stereo Digital
  Pincap 0x00000010: OUT
  Pin Default 0x40f001f0: [N/A] Other at Ext N/A
    Conn = Unknown, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Power states:  D0 D1 D2 D3
  Power: setting=D0, actual=D0
  Connection: 1
     0x12

Node 0x12 [Audio Output] wcaps 0x211: Stereo Digital
  Control: name="IEC958 Playback Con Mask", index=0, device=0
  Control: name="IEC958 Playback Pro Mask", index=0, device=0
  Control: name="IEC958 Playback Default", index=0, device=0
  Control: name="IEC958 Playback Switch", index=0, device=0
  Control: name="IEC958 Default PCM Playback Switch", index=0, device=0
  Device: name="Conexant Digital", type="SPDIF", device=1
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x5]: PCM AC3


Thanks
- Pierre