From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH 10/11] ASoC: codecs: Add AB8500 codec-driver Date: Thu, 24 May 2012 11:33:07 +0100 Message-ID: <20120524103306.GI5361@opensource.wolfsonmicro.com> References: <1336485450-27405-1-git-send-email-ola.o.lilja@stericsson.com> <20120508182751.GJ15893@opensource.wolfsonmicro.com> <4FBC8C11.6020602@stericsson.com> <20120523174009.GE4064@opensource.wolfsonmicro.com> <4FBDD365.7080304@stericsson.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id 50944103EDF for ; Thu, 24 May 2012 12:41:09 +0200 (CEST) Content-Disposition: inline In-Reply-To: <4FBDD365.7080304@stericsson.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: Ola Lilja Cc: "alsa-devel@alsa-project.org" , Liam Girdwood , Linus Walleij List-Id: alsa-devel@alsa-project.org On Thu, May 24, 2012 at 08:21:25AM +0200, Ola Lilja wrote: > Well, yes. One of the control enables/disables the ability to use another > charge-pump voltage when the signal gets over a certain threshold. The other > parameters are tuning of this theshold and responsiveness. This feature can be > changed during runtime depending of quality vs. powersaving needs. Right, this is what I had expected except usually the consequence of the charge pump voltage failing to adapt rapidly enough is clipping which is normally considered unacceptably bad in any situation so with most devices there isn't much opportunity to tune the responsiveness. You do see on/off controls that get used for configurations the device can't handle for some reason but the responsiveness parameters that work are normally a static property of the device. I guess you might be able to do something slightly more aggressive for voice perhaps... Anyway, like I say the main thing here is surprise at seeing these things user tunable.