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path: root/Documentation/input/multi-touch-protocol.txt (follow)
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2015-03-20Input: add MT_TOOL_PALMCharlie Mooney1-3/+6
Currently there are only two "tools" that can be specified by a multi-touch driver: MT_TOOL_FINGER and MT_TOOL_PEN. In working with Elan (The touch vendor) and discussing their next-gen devices it seems that it will be useful to have more tools so that their devices can give the upper layers of the stack hints as to what is touching the sensor. In particular they have new experimental firmware that can better differentiate between palms vs fingertips and would like to plumb a patch so that we can use their hints in higher-level gesture soft- ware. The firmware on the device can reasonably do a better job of palm detection because it has access to all of the raw sensor readings as opposed to just the width/pressure/etc that are exposed by the driver. As such, the firmware can characterize what a palm looks like in much finer-grained detail and this change would allow such a device to share its findings with the kernel. Signed-off-by: Charlie Mooney <charliemooney@chromium.org> Acked-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-03-21doc: fix double wordsMasanari Iida1-1/+1
Fix double words "the the" in various files within Documentations. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-06-13Input: MT - Specify that ABS_MT_SLOT must have a minimum of 0Peter Hutterer1-0/+2
This is effectively already in force through input_mt_init_slots, and uinput too ignores the actual minimum. Since slots are a kernel-genenerated axis only, non-zero minimums make little sense and are likely to cause errors. Better to treat a non-zero minimum as kernel bug if it ever happens. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
2012-07-05Input: MT - Include win8 supportHenrik Rydberg1-26/+92
The newly released HID protocol for win8 multitouch devices is capable of transmitting more information about each touch. In particular, it includes details useful for touch alignment. This patch completes the MT protocol with the ABS_MT_TOOL_X/Y events, and documents how to map win8 devices. Cc: Stephane Chatty <chatty@enac.fr> Cc: Benjamin Tissoires <benjamin.tissoires@enac.fr> Cc: Peter Hutterer <peter.hutterer@who-t.net> Acked-by: Chase Douglas <chase.douglas@canonical.com> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
2011-08-23Input: mt - document devices reporting more touches than slotsDaniel Kurtz1-0/+14
Some devices are capable of identifying and/or tracking more contacts than they can report to the driver. Document how a driver should handle this, and what userspace should expect. Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Acked-by: Chase Douglas <chase.douglas@canonical.com> Acked-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-12-20input: mt: Document interface updatesHenrik Rydberg1-18/+26
This patch documents the recent input-mt interface changes. Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
2010-12-16input: mt: Add hovering distance axisHenrik Rydberg1-1/+8
Touch devices capable of hovering, i.e., fingers detected a distance from the surface, are not supported by the current input MT protocol. This patch adds ABS_MT_DISTANCE, which may be used to indicate the distance between the contact and the surface. Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
2010-07-15Input: document the MT event slot protocolHenrik Rydberg1-69/+149
This patch adds documentation for the ABS_MT_SLOT event and gives examples of how to use the event slot protocol. Reviewed-by: Ping Cheng <pingc@wacom.com> Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-03-21Input: update the status of the Multitouch X driver projectHenrik Rydberg1-6/+1
The Multitouch X driver project has moved to alpha status. This patch updates the documentation accordingly. Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-03-21Input: clarify the no-finger event in multitouch protocolHenrik Rydberg1-0/+16
The current documentation does not explicitly specify how to report zero fingers, leaving a potential problem in the driver implementations and giving no parsing directive to userland. This patch defines two equally valid ways. Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-01-28Input: update multi-touch protocol documentationHenrik Rydberg1-8/+40
This patch documents a new ABS_MT parameter and adds further text to clarify some points around the MT protocol. Requested-by: Yoonyoung Shim <jy0922.shim@samsung.com> Requested-by: Mika Kuoppala <mika.kuoppala@nokia.com> Requested-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-05-23Input: multitouch - augment event semantics documentationHenrik Rydberg1-24/+79
Through the collaboration to adapt the N-trig and Stantum HID drivers to the MT protocol, some semantic clarifications to the protocol have been made. This patch adds them to the MT documentation. Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Tested-by: Stéphane Chatty <chatty@enac.fr> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-04-30Input: document the multi-touch (MT) protocolHenrik Rydberg1-0/+140
This patchs adds documentation for the multi-touch protocol to Documentation/input/. [randy.dunlap@oracle.com: grammar fixes] Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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