From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: ALSA: usb: Work around CM6631 sample
Date: Wed, 06 Mar 2013 09:43:00 +0100
Message-ID: <51370194.1080808@ladisch.de>
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To: Demian Martin <demianm_1@yahoo.com>
Cc: hegge@resisty.net, alsa-devel@alsa-project.org
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Demian Martin wrote:
> CMedia ... told me that the chips are different

The CM6610/20 chips did not get an updated -A version, so it's possible
that the changes are just for the I=B2S I/Os, which should not affect the
USB interface.  Maybe the newer chip just gave them an opportunity to
update the firmware.

> there is a sequence problem between setting sample rate and sending
> the "play' command.

This sound like the interface setting problem fixed by this patch.

> Something about UAC1 method not being the same as UAC2.

But this might indicate that we need to kick the Clock Source Entity.


Regards,
Clemens