Re: optical SPDIF output on Abit NF7 nforce2 main board.

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Takashi Iwai wrote:
> At Mon, 01 Sep 2003 13:28:30 +0200,
> Carsten Koch wrote:
> 
>>Hi,
>>
>>I have an Abit NF7 nforce2 main board, which has an optical SPDIF output
>>controlled by the on-board sound.
>>
>>With nvida's "nvsound" driver, the optical output works.
>>
>>With alsa, I have been unable to get any sound out of it so far.
>>I tried the alsa-0.9.0.cvs20030217-23 alsa drivers that came with
>>my SuSE 8.2 system, the release 0.9.6 drivers and last Friday's CVS.
>>
>>lspci reports the device as:
>>
>>00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 Audio Controler (MCP) (rev a1)
>>         Subsystem: ABIT Computer Corp.: Unknown device 1c02
>>         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
>>         Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
>>         Latency: 0 (500ns min, 1250ns max)
>>         Interrupt: pin A routed to IRQ 5
>>         Region 0: I/O ports at d800 [size=256]
>>         Region 1: I/O ports at dc00 [size=128]
>>         Region 2: Memory at ef001000 (32-bit, non-prefetchable) [size=4K]
>>         Capabilities: [44] Power Management version 2
>>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
>>                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
>>
>>Alsamixer says "Card: NVidia nForce2", "Chip: Realtek ALC650 rev 3" and offers
>>these four IEC958 items: "Item: IEC958" (on/off), "Item: IEC958 Input Monitor" (on/off),
>>"Item: IEC958 Playback AC97-SPSA" (3 level control), "Analog to IEC958 Output" (on/off).
>>
>>I was expecting that "Item: IEC958" would turn the optical SPDIF output on/off,
>>but the light is always on and the sound is always off, no matter how I set
>>that switch.
> 
> 
> how did you test spdif out?  you need to choose the PCM "spdif" (aka
> "iec958") for the proper output over SPDIF.
> 
> 
>>I was also expecting that "Item: IEC958 Input Monitor" would route the SPDIF
>>sound from my DVB card (whose output I have connected to the SPDIF input on
>>the main board) to the optical SPDIF output when I set that switch to on, but
>>again toggling that switch does nothing: the light is always on and the sound
>>is always off.
> 
> 
> spdif input on ALC650 didn't work until this morning.  i applied the
> patch from James to cvs, so now it should work (as long as sf's
> anon-cvs repository is properly mirrored).
> 
> 
> Takashi
> 
> 
Also, do NOT use alsamixer to test this. I have found that alsamixergui 
works ok.
alsamixer has some bugs, e.g. Muting the IEC958 output actually enables 
output, and un-muting disables output, but alsamixergui gets everything 
right.
Also, alsamixer cannot handle all the different toggle switches correctly.

Cheers
James





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