On 12 May 2014 11:12, Jyri Sarha [off-list ref] wrote:

Since RFC version of the patch set:
- Split callbacks removal patch away from "Integrated ASoC DAI
  component driver implementation" patches for easier reading

This set of patches fixes OMAP4+ HDMI audio. The structure of the
implementatin looks a bit different than before. Instead of creating a
driver specific API for a separate ASoC component driver to connect
to, this implementation integrates an the component driver into the
HDMI driver.

The idea is to use an existing ASoC component driver API instead of
creating a new custom API for each HDMI IP and to avoid splitting the
driver to half for separate video and audio parts connected with the
API.

The new implementation also uses simple-audio-card for a machine
driver instead of having its own HW specific machine driver.

The patches are based on 3.15-rc2 merged with
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
and
git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux.git work/dss-dt-omap5

Everything is pushed here here:
git://git.ti.com/~jyrisarha/ti-linux-kernel/jyrisarhas-audio-video-linux-feature-tree.git omap-hdmi-audio

hey, this worked straight away :)

But there seems to be something wrong with the channel mapping.

For stereo (speaker-test -c 2) the mapping is correct.

But for -c 4 and -c 8 it gets weird:
speaker-test -c 4 -s X # where X is 1-4
1: Front Left is Rear Left
2: Front Right is Rear Right
3: Rear Right is Front Right
4: Rear Left is Front Left

speaker-test -c 8 -s X # where X is 1-8
1: Front Left is Rear Left
2: Center is Rear Left
3: Front Right is Rear Right
4: Side Right is Front Right
5: Rear Right is silent
6: Rear Left is Center
7: Side Left is Front Left
8: LFE - Rear Right

I think you need to check what channel order ALSA expects. I believe
speaker-test does the right thing on my HTPC normally connected to my
receiver.

Note: I am not 100% sure about the -c 8 results. I might have to do
the test again.

Tested on VAR-DVK-OM44 (OMAP4460) with Yamaha RX-A1030 Surround receiver.

regards
Joachim Eastwood