ENGR00271359 Add Multi-touch support

The previous behavior of the driver did not work properly with Qt5
QtQuick multi touch-point gestures, due to how touch-points are
reported when removing a touch-point. My interpretation of the
available documentation [1] was that the driver should report all
touch-points between SYN_REPORTs, but it is not explicitly stated so.
I've found another mail-thread [2] where the creator of the protocol
states:

"The protocol defines a generic way of sending a variable amount of
contacts. The contact count is obtained by counting the number of
non-empty finger packets between SYN_REPORT events."-Henrik Rydberg

I think this verifies my assumption that all touch-points should be
reported between SYN_REPORTs, otherwise it can not be used to obtain
the count.

[1] https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt
[2] http://lists.x.org/archives/xorg-devel/2010-March/006466.html

Signed-off-by: Erik Boto <erik.boto@pelagicore.com>
Signed-off-by: Mahesh Mahadevan <Mahesh.Mahadevan@freescale.com>
(cherry picked from commit 7cba001c5a502680f6dbf902821726779a9c9287)

0 files changed, 0 insertions, 0 deletions