[alsa-devel] Problems with the DP MST audio support patchset

[Takashi Iwai]

On Fri, 31 Mar 2017 08:29:01 +0200,
Yang, Libin wrote:
> 
> Hi Takashi,
> 
> Do you have some suggestion for this issue.

I guess the digital-7.1 corresponds to HBR, and it's a special setup.
Meanwhile 5.1 output he has tried is likely the LPCM, so both are in a
completely differently manner.


Takashi

> 
> Hi Pascal,
> 
> Please see my comments below.
> 
> >-----Original Message-----
> >From: Pascal Wichmann [mailto:pascal.wichmann at pa-w.de]
> >Sent: Friday, March 31, 2017 2:12 PM
> >To: Yang, Libin <libin.yang at intel.com>; Libin Yang
> ><libin.yang at linux.intel.com>; alsa-devel at alsa-project.org
> >Subject: Re: [alsa-devel] Problems with the DP MST audio support patchset
> >
> >-----BEGIN PGP SIGNED MESSAGE-----
> >Hash: SHA256
> >
> >Hi,
> >
> >> Get it. Basically, 5.1 audio should work. What format are you using
> >> for testing the 5.1 audio?
> >I do not use a specific format for testing; the issue occurs using speaker-test as
> >well as using any application with audio output as for example vlc, rhythmbox
> >or a browser like chromium or firefox.
> >
> >As mentioned, when configuring the output as digital stereo or 7.1 surround,
> >except for the second issue explained in my first mail (which actually is more
> >annoying) the audio works.
> 
> Yes, that's strange. I asked about the format is try to make sure you are using the
> same format as 7.1. As you are using speaker-test, the format is not the problem.
> 
> We tried to reproduce this issue here and unfortunately failed. We can't make
> the HDMI work through our AV receiver. 
> 
> I checked your alsa-info.sh output and didn't find the problem.
> 
> Regard,
> Libin
> 
> >
> >Regards,
> >Pascal
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