linux-kernel - Re: [PATCH 3/3] hid: 3m: Correct touchscreen emulation

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Message-Id: <2A410207-8AAA-4D5A-846A-B69F007E6800@enac.fr>
Date:	Sat, 28 Aug 2010 17:56:52 +0200
From:	Stéphane Chatty <chatty@...c.fr>
To:	"Henrik Rydberg" <rydberg@...omail.se>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] hid: 3m: Correct touchscreen emulation


Le 28 août 10 à 16:29, Henrik Rydberg a écrit :

> The current code sometimes misses to report the last BTN_TOUCH event
> when multiple fingers are lifted simultaneously.  With the
> introduction of MT slots, the tracking id is available to determine
> the oldest active contact.

Hi Henrik,

good job on exploiting the sync quirk!

About the oldest active contact, I'm not so sure though. I don't have  
the device with me but I remember that 3M recycle IDs, giving the  
lowest available ID to any new finger; this means that the lowest ID  
is not always the oldest finger.

Cheers,

St.

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