linux-kernel - Re: [PATCH] input: Introduce light-weight contact tracking

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Message-ID: <4CD70FC0.6060503@seas.upenn.edu>
Date:	Sun, 07 Nov 2010 15:44:48 -0500
From:	Rafi Rubin <rafi@...s.upenn.edu>
To:	Henrik Rydberg <rydberg@...omail.se>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Chris Bagwell <chris@...bagwell.com>,
	Chase Douglas <chasedouglas@...il.com>,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: [PATCH] input: Introduce light-weight contact tracking

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
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