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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: wacom - switch mode upon system resume
  Revert "Input: wacom - merge out and in prox events"
  Input: matrix_keypad - allow platform to disable key autorepeat
  Input: ALPS - add signature for HP Pavilion dm3 laptops
  Input: i8042 - spelling fix
  Input: sparse-keymap - implement safer freeing of the keymap
  Input: update the status of the Multitouch X driver project
  Input: clarify the no-finger event in multitouch protocol
  Input: bcm5974 - retract efi-broken suspend_resume
  Input: sparse-keymap - free the right keymap on error
This commit is contained in:
Linus Torvalds
2010-04-15 11:49:55 -07:00
parent 250541fca7 014f61504a
commit 00eef7bd01
10 changed files with 176 additions and 93 deletions
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23
Documentation/input/multi-touch-protocol.txt
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@@ -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.