Files
ack-tegra/include/linux
Henrik Rydberg 5e5ee686e3 Input: add detailed multi-touch finger data report protocol
In order to utilize the full power of the new multi-touch devices, a
way to report detailed finger data to user space is needed. This patch
adds a multi-touch (MT) protocol which allows drivers to report details
for an arbitrary number of fingers.

The driver sends a SYN_MT_REPORT event via the input_mt_sync() function
when a complete finger has been reported.

In order to stay compatible with existing applications, the data
reported in a finger packet must not be recognized as single-touch
events. In addition, all finger data must bypass input filtering,
since subsequent events of the same type refer to different fingers.

A set of ABS_MT events with the desired properties are defined. The
events are divided into categories, to allow for partial implementation.
The minimum set consists of ABS_MT_TOUCH_MAJOR, ABS_MT_POSITION_X and
ABS_MT_POSITION_Y, which allows for multiple fingers to be tracked.
If the device supports it, the ABS_MT_WIDTH_MAJOR may be used to provide
the size of the approaching finger. Anisotropy and direction may be
specified with ABS_MT_TOUCH_MINOR, ABS_MT_WIDTH_MINOR and
ABS_MT_ORIENTATION. Devices with more granular information may specify
general shapes as blobs, i.e., as a sequence of rectangular shapes
grouped together by a ABS_MT_BLOB_ID. Finally, the ABS_MT_TOOL_TYPE
may be used to specify whether the touching tool is a finger or a pen.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-04-28 09:36:24 -07:00
..
2009-04-07 10:23:34 +01:00
2009-04-05 00:32:22 +02:00
2009-03-31 09:56:26 +01:00
2009-04-16 08:51:52 -07:00
2009-04-05 02:14:15 -04:00
2009-04-06 20:00:51 -04:00
2009-04-01 08:59:23 -07:00
2009-04-01 08:59:23 -07:00
2009-04-07 08:59:11 +02:00
2009-04-03 14:53:32 -07:00
2009-03-27 14:43:59 -04:00
2009-04-03 14:53:32 -07:00
2009-04-01 08:59:29 -07:00
2009-03-30 15:14:53 +02:00
2009-04-03 09:48:29 -07:00
2009-03-31 20:15:33 +02:00
2009-04-02 19:04:53 -07:00
2009-04-06 01:41:22 +02:00
2009-04-02 19:04:49 -07:00
2009-04-06 16:06:26 +01:00
2009-03-30 15:21:59 +02:00
2009-04-01 08:59:17 -07:00
2009-04-07 08:12:38 +02:00
2009-04-02 19:04:48 -07:00
2009-03-26 10:56:35 -07:00
2009-04-03 17:41:23 -07:00
2009-04-01 13:28:15 -04:00
2009-04-03 17:41:12 -07:00
2009-04-01 08:59:13 -07:00
2009-04-01 08:59:13 -07:00
2009-04-01 08:59:13 -07:00
2009-03-30 15:22:01 +02:00
2009-03-26 02:18:35 +01:00
2009-03-30 14:28:58 -07:00
2009-04-01 08:59:24 -07:00
2009-04-03 12:23:06 +02:00
2009-04-03 16:42:35 +01:00
2009-04-03 12:23:06 +02:00
2009-03-27 12:18:56 -04:00
2009-04-01 08:59:15 -07:00
2009-04-02 19:05:01 -07:00
2009-03-26 18:14:21 +01:00