From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Correct way to set NONAUDIO flag
Date: Wed, 17 Aug 2011 19:01:52 +0200
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To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: 'Arun Raghavan' <arun.raghavan@collabora.co.uk>, alsa-devel@alsa-project.org
List-Id: alsa-devel@alsa-project.org

Pierre-Louis Bossart wrote:
> If you try to set the bits with ALSA controls in PulseAudio, somehow the
> settings are overwritten when the iec958 device is opened and initialized
> with default values.

That's how the iec958 device is intended to work.

The AES0..3 parameters of the iec958 device are the _only_ way to set
these flags.  If you don't set them, they get a static default value;
see <http://git.alsa-project.org/?p=alsa-lib.git;a=blob;hb=HEAD;f=src/conf/pcm/iec958.conf>.

If PA wants to set these flags, it must do so when opening the device;
any other mechanism will not work.


Regards,
Clemens