From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarkko Nikula Subject: Re: [PATCH 2/2] OMAP3: DMA: Errata: sDMA FIFO draining does not finish Date: Fri, 1 Oct 2010 14:48:39 +0300 Message-ID: <20101001144839.39b12d4b.jhnikula@gmail.com> References: <1285915146-18511-1-git-send-email-peter.ujfalusi@nokia.com> <201010011151.52547.peter.ujfalusi@nokia.com> <201010011341.22238.peter.ujfalusi@nokia.com> <20101001144345.d5225789.jhnikula@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ew0-f46.google.com ([209.85.215.46]:65146 "EHLO mail-ew0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756642Ab0JALsS (ORCPT ); Fri, 1 Oct 2010 07:48:18 -0400 Received: by ewy23 with SMTP id 23so1199559ewy.19 for ; Fri, 01 Oct 2010 04:48:17 -0700 (PDT) In-Reply-To: <20101001144345.d5225789.jhnikula@gmail.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "G, Manjunath Kondaiah" Cc: Peter Ujfalusi , "Menon, Nishanth" , Tony Lindgren , "linux-omap@vger.kernel.org" , Liam Girdwood On Fri, 1 Oct 2010 14:43:45 +0300 Jarkko Nikula wrote: > Problem has been there probably quite some time but we were able to see > it only after a proper use-case. Which is buffer overrun when doing > audio recording only and after the commit c12abc0 (in 2.6.32). > Problem is also somewhat HW specific. The N900 unit I have stalls almost immediately after the first overrun and dma stop but I haven't been able to reproduce it on my BeagleBoard C2. N810 typically needs a few overruns but stalls eventually. -- Jarkko