tree 33b6774855886c0ab18333d9b73c375858b37333
parent f786bba4499cf3de20da345ce090457ebcef03b0
author Benjamin Tissoires <benjamin.tissoires@enac.fr> 1303388159 +0200
committer Jiri Kosina <jkosina@suse.cz> 1303466082 +0200

HID: hid-multitouch: refactor last_field_index

the current implementation requires the devices to report
HID_DG_CONTACTCOUNT to set the last_field_index value.
However, devices reporting in serial mode (DWAV and PenMount)
do not send this field.
Other devices (3M) add other fields in the reports descriptor
that are not multitouch related at the end, thus the need to
add a special case in the default case when handling events.

A first work around has been set up but with PenMount devices,
we have reached the limit.

The idea is to calculate the last_field_index by relying only on
multitouch fields the device send. This allows us to remove
the handling of non-multitouch events in hid-multitouch, and
guarantee that the function mt_emit_event is always called.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-and-tested-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>