At Tue, 27 Mar 2007 10:44:23 -0600, Rob Franklin wrote: > > On 3/27/07, Takashi Iwai <tiwai@xxxxxxx> wrote: > > At Tue, 27 Mar 2007 08:49:05 -0600, > > Rob Franklin wrote: > > > > > > Hi All, > > > > > > I posted a question a couple of weeks ago to the alsa-users list > > > (Can't get spdif working with ALSA and FC6 on ECS L4S5MG/651+ > > > motherboard), but never got a response. > > > > > > I have been looking at the ALSA source code for the AC'97 codec on my > > > board (CMI9738) and the source code for the intel8x0 driver (for my > > > SiS 7012). However, as far as I can tell from looking at the source, > > > S/PDIF is not enabled/supported for this combination of devices. > > > Additionally, Googling around I haven't found any mention of people > > > getting spdif working with ALSA and a CM9738 / SiS7012 combo. > > > > > > I am wondering whether anyone on the developer list can confirm that > > > this is the case. Also, if this is the case can someone give me an > > > idea of what would be required to get this working. The system is > > > setup with dual boot and so I could grab some of the values from > > > windows using a PCI sniffer, and I might be able to do some hacking on > > > the source code and submit a patch if someone could help guide me in > > > the right direction. > > > > Are you sure it's CM9738? AFAIK, CM9738 doesn't support SPDIF at > > all, but CM9739 does... > > > That was my first thought too, but I pulled open the case last night > and verified that it was indeed a 9738. The download page from the > motherboard manufacturer has a driver for CMI9738 and a CMI9738/9739 > driver (http://www.ecsusa.com/downloads/drivers_sound.html). I am > wondering if there are two different versions of this chip. > > Here is the output from lspci -vv for the sound device: > > 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] > AC'97 Sound Controller (rev a0) > Subsystem: Elitegroup Computer Systems Unknown device 0a44 > Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- > ParErr- Stepping- SERR- FastB2B- > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium > >TAbort- <TAbort- <MAbort- >SERR- <PERR- > Latency: 32 (13000ns min, 2750ns max) > Interrupt: pin C routed to IRQ 22 > Region 0: I/O ports at d000 [size=256] > Region 1: I/O ports at d400 [size=128] > Capabilities: <access denied> > > One thought that I had was to force the AC'97 driver to detect the > chip as a 9739 instead of a 9738 to see whether my 9738 can work as a > 9739. But I'm not sure how to do that short of modifying the source > code and recompiling the kernel module. First check whether its codec id is CMI9738, see /proc/asound/card0/codec97#0/* files. If it's really CM9738, you can hack pci/ac97/ac97_codec.c to replace patch_cm9738 with patch_cm9739 in snd_ac97_codec_ids[]. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
