From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757519Ab0LIXta (ORCPT ); Thu, 9 Dec 2010 18:49:30 -0500 Received: from mail-gw0-f42.google.com ([74.125.83.42]:34565 "EHLO mail-gw0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756238Ab0LIXt2 (ORCPT ); Thu, 9 Dec 2010 18:49:28 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=qL5uENxQ3/T4ms1E57VH1Vs30ZadzlMFYkTrXCVXdTggbLA0NOJ7M+NLYQ6Eje6uvP hxwO8mLg792o4gIaSS0sJNihj1om637o1cLn6N9bR0/pMQppgThx/5WIR8zsCxSBYIVn OMParNNI1zJS+KurYAc5HufDNcULAsjzdz5Xw= Date: Thu, 9 Dec 2010 15:49:21 -0800 From: Dmitry Torokhov To: Henrik Rydberg Cc: Jiri Kosina , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] input: mt: Identify pointer emulation contact Message-ID: <20101209234920.GA14810@core.coreip.homeip.net> References: <1291936745-4973-1-git-send-email-rydberg@euromail.se> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291936745-4973-1-git-send-email-rydberg@euromail.se> 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 Fri, Dec 10, 2010 at 12:19:05AM +0100, Henrik Rydberg wrote: > For MT applications, the tracking id provides a robust way to know > when a touch is new; essential information to determine when _not_ to > emit motion events, for instance. Currently, ST applications do not > have the equivalent information, but instead rely on global properties > such as a change in number of fingers. Moreover, some MT applications > need to know which contact correponds to the pointer. This patch adds > the ABS_TRACKING_ID axis and emits it in > input_mt_report_pointer_emulation(), provided the proper absbit is > setup by the driver. > So how do you propose userspace will use it? Obviously it will not help old dumb (ST) applications and new smart applications should understand MT protocol and thus do not need to pay much attention to ST events anyway. Apparently you have some new dumb userspace in mind here? Thanks. -- Dmitry