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authorHenrik Rydberg <rydberg@euromail.se>2010-07-15 23:10:10 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2010-07-15 23:52:03 -0700
commit40d007e7df1dab17bf1ecf91e718218354d963d7 (patch)
treed8c12e13e71f411b4f66aa44ec9b23935156e49d /Documentation/input
parenta8aef622929bbba4d89498fb41dd445c14fae1f7 (diff)
Input: introduce MT event slots
With the rapidly increasing number of intelligent multi-contact and multi-user devices, the need to send digested, filtered information from a set of different sources within the same device is imminent. This patch adds the concept of slots to the MT protocol. The slots enumerate a set of identified sources, such that all MT events can be passed independently and selectively per identified source. The protocol works like this: Instead of sending a SYN_MT_REPORT event immediately after the contact data, one sends an ABS_MT_SLOT event immediately before the contact data. The input core will only emit events for slots with modified MT events. It is assumed that the same slot is used for the duration of an initiated contact. Acked-by: Ping Cheng <pingc@wacom.com> Acked-by: Chase Douglas <chase.douglas@canonical.com> Acked-by: Rafi Rubin <rafi@seas.upenn.edu> Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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