| commit | f4ccbef2886968ed409939531f6dd0474d53a12a | |
| author | Henrik Rydberg <rydberg@euromail.se> | |
| Sun, 5 Sep 2010 19:57:13 +0000 (5 12:57 -0700) | ||
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | |
| Sun, 5 Sep 2010 19:58:22 +0000 (5 12:58 -0700) | ||
| tree | 764b513e40b681bf3bd908e40e8e3a21015d7579 | treesnapshot (tar.gz zip) |
| parent | cb734c03680eaaad64a20a666300eafd1ac260b2 | commitdiff |
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>
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>
| drivers/input/tablet/wacom_wac.c | diffblobblamehistory | |
| drivers/input/tablet/wacom_wac.h | diffblobblamehistory |