From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Baryshkov Subject: Re: PXA27x and AC97 reset bug Date: Thu, 7 Feb 2008 01:10:55 +0000 (UTC) Message-ID: References: <87ejbpheqk.fsf@polgara.paysbobval> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by alsa0.perex.cz (Postfix) with ESMTP id 6F866244AB for ; Thu, 7 Feb 2008 02:35:09 +0100 (CET) Received: from root by ciao.gmane.org with local (Exim 4.43) id 1JMvfK-0007Gz-PU for alsa-devel@alsa-project.org; Thu, 07 Feb 2008 01:35:02 +0000 Received: from ppp78-37-180-171.pppoe.avangarddsl.ru ([78.37.180.171]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 07 Feb 2008 01:35:02 +0000 Received: from dbaryshkov by ppp78-37-180-171.pppoe.avangarddsl.ru with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 07 Feb 2008 01:35:02 +0000 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: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Hi, Robert Jarzmik wrote: > I hope this subject wasn't previously discussed, as I couldn't find a > trace ... > > The basic question is : why can't the PXA27x reset the AC97 bus in front > of an wm9713 ? I have nearly the same problem here: pxa255, wm9712, sharp SL-6000 (tosa). However resetting the codec in a loop sometime helps. Any info would be appreciated. > And more precisely, I'd like to know : > - are there any references to this bug (Intel note, mailing list ref, > ...) - is it a hardware bug on PXA27x side ? - is it a hardware bug on > wm9713 side ? - is there a known generic workaround (assuming GPIO113 > is connected to wm9713 > reset line is not generic for me) ? > - is there a known platform where this bug does not happen ? -- With best wishes Dmitry