From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dimitris Papastamos Subject: Re: [PATCH 1/2 2.6.38] ASoC: soc-cache: Introduce the cache_bypass option Date: Fri, 11 Feb 2011 15:21:03 +0000 Message-ID: <20110211152103.GA31557@opensource.wolfsonmicro.com> References: <1297436042-18324-1-git-send-email-dp@opensource.wolfsonmicro.com> <20110211151825.GA23687@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from opensource2.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 707EC245BF for ; Fri, 11 Feb 2011 16:21:05 +0100 (CET) Content-Disposition: inline In-Reply-To: <20110211151825.GA23687@opensource.wolfsonmicro.com> 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: Mark Brown Cc: alsa-devel@alsa-project.org, patches@opensource.wolfsonmicro.com, Liam Girdwood List-Id: alsa-devel@alsa-project.org On Fri, Feb 11, 2011 at 03:18:26PM +0000, Mark Brown wrote: > On Fri, Feb 11, 2011 at 02:54:01PM +0000, Dimitris Papastamos wrote: > > This is primarily needed to avoid writing back to the cache > > whenever we are syncing the cache with the hardware. This gives a > > performance benefit especially for large register maps. > > Hrm, this is a rather large and invasive patch to be applying as part of > a bug fix for a specific driver this late in the release process. Can > we do something driver specific for the 2.6.38 release? Em, make WM8994_POWER_MANAGEMENT_5 a volatile register? That is sort of a hack but I can't think of anything else. Thanks, Dimitris