Hi Pedro,
That's super-cool, thanks!
Please consider submitting the patch through the right channels.
Since I'm new here, I am not sure if this is correct, but here is what
I found out:
1. as a patch(1) to the contributors. No idea if geoff or jmk are still
working there:
http://plan9.bell-labs.com/wiki/plan9/How_to_contribute/
2. ask David du Colombier to accept and publish your patch:
http://www.9legacy.org
Cheers,
Dante
On 23.08.2014 11:32, Pedro Coutin wrote:
Hello everyone,
I made a working audio driver for the Raspberry Pi by using the
chipset's
PWM device directly.
The sound quality seems pretty acceptable to me. I managed to play
music
and the Doom port from 9front with it.
Since it uses the PWM device, it only works for the TRS stereo jack.
I
believe that the most sensible way to make HDMI audio work is to
make a VCHI(Q) driver, and then an audio driver that interfaces with
that. There's very little, if any, documentation available on this and
the Linux kernel code for it is pretty huge.
Tarball with changed files:
http://acsweb.ucsd.edu/~pcoutin/bcm-audio.tgz
Repository:
https://bitbucket.com/pcoutin/9pi-audio
Man page for PWM device:
http://acsweb.ucsd.edu/~pcoutin/bcmpwm.html
I guess I could extend the PWM driver so that the two channels can be
enabled/disabled separately.
