[alsa-devel] [Alsa-user] hdmi sound rerouted?

[Takashi Iwai]

At Mon, 04 Nov 2013 19:53:42 +0100,
Dagg Stompler wrote:
> 
> 
> 
> > ----- Original Message -----
> > From: Takashi Iwai
> > Sent: 11/04/13 04:06 PM
> > To: Deucher, Alexander
> > Subject: Re: [alsa-devel] [Alsa-user]  hdmi sound rerouted?
> > 
> > At Mon, 4 Nov 2013 13:47:54 +0000,
> > Deucher, Alexander wrote:
> > > 
> > > > -----Original Message-----
> > > > From: Takashi Iwai [mailto:tiwai at suse.de]
> > > > Sent: Monday, November 04, 2013 8:05 AM
> > > > To: daggs at gmx.com
> > > > Cc: Deucher, Alexander; Clemens Ladisch; alsa-user at lists.sourceforge.net;
> > > > alsa-devel at alsa-project.org
> > > > Subject: Re: [alsa-devel] [Alsa-user] hdmi sound rerouted?
> > > > 
> > > > At Mon, 04 Nov 2013 13:21:25 +0100,
> > > > daggs at gmx.com wrote:
> > > > >
> > > > > the original issue is that wen using an ATI gpu with hdmi in it, rerouting the
> > > > sound via the ati hdmi card doesn't work, only via the generic.
> > > > >
> > > > > alsa devs pointed out that the ati cards listed in intel_hda.c aren't updated
> > > > with latest cards due to insufficient info on about the cards.
> > > > >
> > > > > Alex Deucher from AMD's dev answered that he will query the right team
> > > > in his workplace but no response was received fro him yet.
> > > > 
> > > > OK, then could you alsa-info.sh output?
> > > > 
> > > > The situation in the upstream has changed since we have a lot more
> > > > AMD-specific HDMI codes in the latest driver for 3.13 kernel. So,
> > > > it's not only a matter of snoop flag.
> > > 
> > > I was specifically trying to get clarification on which parts needed the snoop flag. Is there some other larger issue? From the feedback I've seen lately, audio has been working pretty well on AMD GPUs with Anssi's patches.
> > 
> > That's why I started asking :) The recent code should cover known
> > issues of AMD HDMI codecs, at least. But if there is a new chip, we'd
> > need to test and add the corresponding entry.
> > 
> > 
> > Takashi
> 
> alsa info can be found at http://www.alsa-project.org/db/?f=590cb353dd93e9ea5f9da3e072cdcd5d464e8609
> hope it helps

The card shown as "Generic" is actually yet another AMD HDMI chip.
And this should work without the snooping.  Unless you hear any
audible problems, no reason to fix this one.

Another "HDA ATI HDMI" one is tied with a different graphics unit.
I don't know what hardware configuration you have.  Do you have
multiple AMD graphics cards?  Basically each HDMI audio entry is tied
with the dedicated graphics chip (board).  You wanted to play back via
this HDMI and it didn't work?


Takashi