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author | Michal Marek <mmarek@suse.cz> | 2010-08-04 14:05:07 +0200 |
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committer | Michal Marek <mmarek@suse.cz> | 2010-08-04 14:05:07 +0200 |
commit | 7a996d3ab150bb0e1b71fa182f70199a703efdd1 (patch) | |
tree | 96a36947d90c9b96580899abd38cb3b70cd9d40b /Documentation/input/multi-touch-protocol.txt | |
parent | 7cf3d73b4360e91b14326632ab1aeda4cb26308d (diff) | |
parent | 9fe6206f400646a2322096b56c59891d530e8d51 (diff) | |
download | blackbird-op-linux-7a996d3ab150bb0e1b71fa182f70199a703efdd1.tar.gz blackbird-op-linux-7a996d3ab150bb0e1b71fa182f70199a703efdd1.zip |
Merge commit 'v2.6.35' into kbuild/kconfig
Conflicts:
scripts/kconfig/Makefile
Diffstat (limited to 'Documentation/input/multi-touch-protocol.txt')
-rw-r--r-- | Documentation/input/multi-touch-protocol.txt | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/Documentation/input/multi-touch-protocol.txt b/Documentation/input/multi-touch-protocol.txt index 8490480ce432..c0fc1c75fd88 100644 --- a/Documentation/input/multi-touch-protocol.txt +++ b/Documentation/input/multi-touch-protocol.txt @@ -68,6 +68,22 @@ like: SYN_MT_REPORT SYN_REPORT +Here is the sequence after lifting one of the fingers: + + ABS_MT_POSITION_X + ABS_MT_POSITION_Y + SYN_MT_REPORT + SYN_REPORT + +And here is the sequence after lifting the remaining finger: + + SYN_MT_REPORT + SYN_REPORT + +If the driver reports one of BTN_TOUCH or ABS_PRESSURE in addition to the +ABS_MT events, the last SYN_MT_REPORT event may be omitted. Otherwise, the +last SYN_REPORT will be dropped by the input core, resulting in no +zero-finger event reaching userland. Event Semantics --------------- @@ -217,11 +233,6 @@ where examples can be found. difference between the contact position and the approaching tool position could be used to derive tilt. [2] The list can of course be extended. -[3] The multi-touch X driver is currently in the prototyping stage. At the -time of writing (April 2009), the MT protocol is not yet merged, and the -prototype implements finger matching, basic mouse support and two-finger -scrolling. The project aims at improving the quality of current multi-touch -functionality available in the Synaptics X driver, and in addition -implement more advanced gestures. +[3] Multitouch X driver project: http://bitmath.org/code/multitouch/. [4] See the section on event computation. [5] See the section on finger tracking. |