[alsa-devel] Need help with WM8960

[Timur Tabi]

Mark,

I'm trying to port some old Linux code to upstream for a third-party board
that uses a Freescale P1022 and a Wolfson WM8960. I've got audio working,
but it's using a hack from the third-party code, and I don't know how to
do implement the change properly, mostly because I don't understand DAPM.

The first problem is that I get this:

	wm8960 0-001a: No platform data supplied

What kind of platform data is the driver expecting, and how do I get it
that data?  I don't seem to need any platform data to make the code work.

Second, I uploaded the hack to wm8960.c at http://pastebin.com/RwVy6cQg

You can see that he disables the DAPM controls for DACL, DACR, ADCL, and
ADCR, and forces those bits set in the wm8960_probe function.  There's
also a comment that documents some limitations.  What is the proper way to
implement this change?

Third, in order to actually hear audio, I had to unmute the "Left Output
Mixer PCM" and "Right Output Mixer PCM".  Is this something that the
machine driver should do automatically?  And if so, how?

-- 
Timur Tabi
Linux kernel developer at Freescale