From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [linux-pm] [PATCH 02/11] PM: extend PM QoS with per-device wake-up constraints Date: Sat, 20 Aug 2011 16:30:00 +0100 Message-ID: <20110820152959.GA22424@opensource.wolfsonmicro.com> References: <20110820062543.GA5011@opensource.wolfsonmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from opensource.wolfsonmicro.com ([80.75.67.52]:54646 "EHLO opensource2.wolfsonmicro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752208Ab1HTPaE (ORCPT ); Sat, 20 Aug 2011 11:30:04 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Alan Stern Cc: "Rafael J. Wysocki" , Linux PM mailing list , linux-omap@vger.kernel.org, Jean Pihet , markgross@thegnar.org On Sat, Aug 20, 2011 at 09:48:25AM -0400, Alan Stern wrote: > No, I as wasking about driver- and subsystem-specific interfaces to > userspace that translate into things users are already doing. Kevin's > example was a touchscreen (although that was really an example of > setting a power usage level, not a latency constraint). Do you have > any others? Any sort of media streaming would be an obvious example - the application picks the amount of data it buffers and how often it's notified of progress depending on the usage which then controls how quickly the system needs to handle things.