From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Tissoires Subject: Re: [PATCH] hid-multitouch: fix broken eGalax Date: Sun, 12 Jun 2011 20:07:49 +0200 Message-ID: References: <1307859728-3446-1-git-send-email-benjamin.tissoires@enac.fr> <20110612152915.GA18794@polaris.bitmath.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:63313 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751018Ab1FLSHv (ORCPT ); Sun, 12 Jun 2011 14:07:51 -0400 In-Reply-To: <20110612152915.GA18794@polaris.bitmath.org> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Henrik Rydberg Cc: Dmitry Torokhov , Jiri Kosina , Stephane Chatty , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Hi Henrik, On Sun, Jun 12, 2011 at 17:29, Henrik Rydberg wrote: > Hi Benjamin, > >> With this patch, the detection is made only when the field ContactID >> has been detected inside the collection. > > The patch introduces an order dependence by relying on ContactID > occuring early on, which seems unnecessary. How about checking for the > presence of ContactID instead, and simply modify the logic which uses > last_field_index and last_slot_field? That's exactly what it does. A touch report has to contain the contactID field. And each touch is at least in one collection (some devices send one touch per collection, others only one collection for the whole report). The idea is when hardware makers introduce several input mode for their device, they has to put them in different collections. The logic behind the last_field_index and last_slot_field are only for multitouch. So it does not matter if the contactID comes first or last in the collection, it will set the right index/field. Cheers, Benjamin > > Thanks, > Henrik >