From: Henrik Rydberg <rydberg@euromail.se>
Date: Sun, 5 Sep 2010 19:57:13 +0000 (-0700)
Subject: Input: wacom - add a quirk for low resolution Bamboo devices
X-Git-Tag: v2.6.37-rc1~135^2^2~49
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4ccbef2886968ed409939531f6dd0474d53a12a;p=pandora-kernel.git

Input: wacom - add a quirk for low resolution Bamboo devices

The Bamboo Touch reports a sub-screen resolution of 480x320.  The
signal-to-noise ratio is only about 100, so filtering is needed in
order to reduce the jitter to a usable level. However, the low
resolution leads to round-off errors in the EWMA filter, resulting in
extremely jerky pointer motion. This patch explicitly sets a higher
resolution for those devices, and tells this to the completion handler
via a low-resolution quirk.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

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