From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: Master Plan on rewinding Date: Sun, 21 Sep 2014 11:53:58 +0200 Message-ID: <541EA036.5010707@ladisch.de> References: <540C76E0.9050808@gmail.com> <54148E72.2050903@gmail.com> <541584FB.2030208@gmail.com> <5416B852.6080406@gmail.com> <54171B66.3010705@linux.intel.com> <54171E81.2090302@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from dehamd003.servertools24.de (dehamd003.servertools24.de [31.47.254.18]) by alsa0.perex.cz (Postfix) with ESMTP id 0E272261AA3 for ; Sun, 21 Sep 2014 11:53:15 +0200 (CEST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Raymond Yau Cc: ALSA Development Mailing List , Takashi Iwai , Pierre-Louis Bossart , Takashi Sakamoto , "Alexander E. Patrakov" , David Henningsson List-Id: alsa-devel@alsa-project.org Raymond Yau wrote: > Does snd-oxygen provide this position with granularity which is less than > the minimum period size ? Yes. Its DMA controller uses a burst size of 32 bytes. The pointer registers are documented as reporting the position with 4-byte accuracy, but there were problems when the period/buffer sizes were not aligned to 32 bytes. I've set the minimum period size to 64 bytes, just to be safe. Regards, Clemens