From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: [RFC] Adding BTN_TOOL_TOUCH to input.h Date: Sat, 27 Nov 2010 15:39:02 -0800 Message-ID: <20101127233901.GA29981@core.coreip.homeip.net> References: <4CEE6D2A.9040408@euromail.se> <4CEE6EE8.4060805@gmail.com> <4CF0BC13.2010800@gmail.com> <20101127083229.GA28745@core.coreip.homeip.net> <4CF0C69D.9080904@gmail.com> <20101127091533.GA27213@core.coreip.homeip.net> <4CF0D35B.4030807@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-yw0-f46.google.com ([209.85.213.46]:47539 "EHLO mail-yw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753725Ab0K0XjK (ORCPT ); Sat, 27 Nov 2010 18:39:10 -0500 Received: by ywl5 with SMTP id 5so1456856ywl.19 for ; Sat, 27 Nov 2010 15:39:10 -0800 (PST) Content-Disposition: inline In-Reply-To: <4CF0D35B.4030807@gmail.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Nikolai Kondrashov Cc: Chris Bagwell , Henrik Rydberg , Ping Cheng , linux-input , Jiri Kosina On Sat, Nov 27, 2010 at 12:46:03PM +0300, Nikolai Kondrashov wrote: > On 11/27/2010 12:15 PM, Dmitry Torokhov wrote: > >2000LPI == about 79 l/mm. How is it not useable? > TBH, I didn't make any real calculations. > The introduced error isn't very high, indeed. The vertical size of 4x3 inch > tablet becomes 75 mm instead of 76 mm. So maybe it's alright. > > >In mainline synaptics is the only one that does this. We do not know how > >many drivers in vendor trees fill and use this data nor we do not know > >about userspace. The fact that we were not able to locate them does not > >mean they do not exist. The units/mm are part of input ABI now. > Well, I can't argue with you here. > I didn't think about 3rd party drivers, TBH. > > >Right, standarize on existing UOM (which are per/mm) and then implement > >other UOM if theya re really needed. > Will this fix qualify for inclusion into 2.6.37? Yes, I believe it does. > Also, what do you think about units per radians for rotational axis? Works for me. -- Dmitry