From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rafi Rubin Subject: Re: [PATCH] input: Introduce light-weight contact tracking Date: Sun, 07 Nov 2010 15:44:48 -0500 Message-ID: <4CD70FC0.6060503@seas.upenn.edu> References: <1289161108-32309-1-git-send-email-rydberg@euromail.se> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from fox.seas.upenn.edu ([158.130.68.12]:41927 "EHLO fox.seas.upenn.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752533Ab0KGU7N (ORCPT ); Sun, 7 Nov 2010 15:59:13 -0500 In-Reply-To: <1289161108-32309-1-git-send-email-rydberg@euromail.se> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Henrik Rydberg Cc: Dmitry Torokhov , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Bagwell , Chase Douglas , Takashi Iwai On 11/07/2010 03:18 PM, Henrik Rydberg wrote: > Some kernel drivers demand the use of contact tracking for proper > filtering and pointer emulation. With one exception, these drivers > are limited to a maximum of four concurrent contacts. This patch adds > a simple matcher for up to four contacts, with these notable properties: Tracking in the ntrig driver needs to support a minimum of 6 fingers. I have also seen press releases claiming 10+ eventually. I don't know if those devices will support tracking in the hardware/firmware. Rafi