From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754753Ab1L0Rde (ORCPT ); Tue, 27 Dec 2011 12:33:34 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:40720 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754721Ab1L0Rdb (ORCPT ); Tue, 27 Dec 2011 12:33:31 -0500 Date: Tue, 27 Dec 2011 17:33:27 +0000 From: Mark Brown To: Tomoya MORINAGA Cc: Liam Girdwood , Jaroslav Kysela , Takashi Iwai , Lars-Peter Clausen , Dimitris Papastamos , Mike Frysinger , Daniel Mack , alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, qi.wang@intel.com, yong.y.wang@intel.com, joel.clark@intel.com, kok.howg.ewe@intel.com Subject: Re: [PATCH 3/3 v2] sound/soc/lapis: add platform driver for ML7213 IOH I2S Message-ID: <20111227173326.GC22970@opensource.wolfsonmicro.com> References: <1324349144-12784-1-git-send-email-tomoya.rohm@gmail.com> <1324349144-12784-3-git-send-email-tomoya.rohm@gmail.com> <20111220132314.GQ2866@opensource.wolfsonmicro.com> <20111222005816.GB27144@opensource.wolfsonmicro.com> <20111222103946.GA4546@opensource.wolfsonmicro.com> <20111226121207.GF8722@opensource.wolfsonmicro.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Cookie: Is this really happening? User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 27, 2011 at 10:25:25AM +0900, Tomoya MORINAGA wrote: > 2011/12/26 Mark Brown : > > So you're just talking about standard underflows if the application > > can't keep up? > No. not only underflow but overflow. Same difference. > > There's *no* reason for your driver to do anything about > > this, it's a really basic thing that affects all audio hardware.  Just > > write a driver for the hardware. > In case driver layer doesn't have the function, > which part works for the under/overflow ? Application ? or nothing ? Your driver has to accurately describe what the hardware supports and then the application layer is responsible for making sure it keeps up with things.