On 25.11.2010 14:21, John Ettedgui wrote:
On Thu, Nov 25, 2010 at 3:40 AM, Anssi Hannula anssi.hannula@iki.fi wrote:
On 25.11.2010 13:09, John Ettedgui wrote:
On Thu, Nov 25, 2010 at 2:49 AM, Anssi Hannula anssi.hannula@iki.fi wrote:
On 25.11.2010 06:12, John Ettedgui wrote:
I'm actually trying to get a 5.1 setup working without passthrough, if I use mplayer with passthrough my receiver behaves just fine, but I am trying to send the 6 channels from the computer.
I was actually told that the current ALSA driver for radeon's hdmi does not support more than 2 channels, and that would explain why I'm getting this behavior. Is that true though?
Yes.
However, strangely your log output seems to show the intel's hdmi parser being used instead:
ALSA sound/pci/hda/patch_intelhdmi.c:842: hdmi_setup_stream: NID=0x2, stream=0x1, new-format=0x11
Were you just trying some patch at the time?
yes Wu gave me a patch to try against the kernel, I'm guessing this is the reason you see something unexpected.
Did 6 channels work with that patch? (possibly with a wrong channel order)
Not any better as far as I remember.
OK. Did 2 channel audio continue to work with it?
If you are not sure, here's the patch doing the same thing against current alsa driver: http://stuff.onse.fi/0001-ALSA-hda-Use-generic-HDMI-code-for-ATI-HDMI-codecs...
Confirming that would help (it would allow to switch the ATI chip to use the generic parser instead of the ATI-specific one), though not with the multichannel issue (see below).
[...]
Since I just moved to jack/rca cables I'm in no hurry anymore, but is there any reason why the driver cannot work with more than 2 channels?
I don't really know (it is simply not implemented).
Alright.
Anything I could do to help with that?
Possibly. But see above, so that we won't try the same things you already tried :)
Sure :)
Looking again at the the alsa info output you provided, I don't think I have any great ideas. It looks like the chip simply reports that it supports a maximum of 2 channels.
One option could be hardcoding "chans = 8;" in generic_hdmi_build_pcms() in sound/pci/hda/patch_hdmi.c (assuming you have the above patch and 2 channel audio works with it). However, I find it rather unlikely that it would make any difference.