From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: Re: trouble with alsa, wolfson, and TI OMAP35xx McBSP Date: Thu, 23 Apr 2009 12:20:14 +0300 Message-ID: <200904231220.14465.peter.ujfalusi@nokia.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: ext twebb Cc: "alsa-devel@alsa-project.org" , "linux-omap@vger.kernel.org Mailing List" List-Id: linux-omap@vger.kernel.org On Wednesday 22 April 2009 20:58:01 ext twebb wrote: > Problem 2: > Test tone is being presented by the user application, providing a 1Khz > tone sampled at 44.1Khz. The data are S16_LE, right channel only. Left > channel is quiet. The data seems to slip back and forth from left to > right channel. This is reproducable and verified with a scope trace. > > Anybody have any ideas what might be going wrong here? Traces for > codec reg dump and mcbsp are attached. As Jarkko already asked: are you seeing the channel switch while running or= is = it happens on playback start? AFAIK this phenomena can be also seen on Beagle board. I have done some investigation regarding to these, but so far I can not say = that I know what causes it. BTW: these are separate issues (startup switch and runtime switch). > Thanks, > twebb -- = P=E9ter