Dne 13.3.2012 21:59, Ondrej Zary napsal(a):
Hello, I'm trying do implement support for Philips PSC724 Ultimate Edge card, which is based on VT1722 + WM8776 + WM8766 chips. I've examined the connections and commented them in the code. The patch is heavily based on se.c.
When trying to play a sound, the player runs but no sound comes from the output, no matter what I do with alsamixer.
The interesting thing is that recording works - I can record something from e.g. line-in and play it on another machine. Recording source selection in alsamixer works too (if line-in is deselected, only silence is recorded). So WM8776 I2C control works.
I'm missing something but don't know what. Any ideas?
I always found that a simple proc interface listing all register values of the chips onboard greatly helped with troubleshooting. E.g. http://git.alsa-project.org/?p=alsa-kmirror.git;a=blob;f=i2c/other/ak4xxx-ad...
http://git.alsa-project.org/?p=alsa-kmirror.git;a=blob;f=i2c/other/ak4114.c;...
Regards,
Pavel.