user/sven/linux.git/Documentation/input/multi-touch-protocol.txt, branch v4.9.46

Input: fix typo in MT documentation

2015-09-19T18:39:02Z

Section "Event Computation" had this: ... ABS_MT_TOOL_X := C_X ABS_MT_TOOL_X := C_Y Replace the second ABS_MT_TOOL_X with ABS_MT_TOOL_Y. Signed-off-by: Daniel Martin Acked-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: add MT_TOOL_PALM

2015-03-20T16:45:28Z

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 Acked-by: Peter Hutterer Signed-off-by: Dmitry Torokhov

doc: fix double words

2014-03-21T12:16:58Z

Fix double words "the the" in various files within Documentations. Signed-off-by: Masanari Iida Signed-off-by: Jiri Kosina

Input: MT - Specify that ABS_MT_SLOT must have a minimum of 0

2013-06-13T19:32:00Z

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 Acked-by: Benjamin Tissoires Signed-off-by: Henrik Rydberg

Input: MT - Include win8 support

2012-07-05T05:13:51Z

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 Cc: Benjamin Tissoires Cc: Peter Hutterer Acked-by: Chase Douglas Signed-off-by: Henrik Rydberg

Input: mt - document devices reporting more touches than slots

2011-08-24T06:08:20Z

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 Acked-by: Chase Douglas Acked-by: Henrik Rydberg Signed-off-by: Dmitry Torokhov

input: mt: Document interface updates

2010-12-20T14:09:27Z

This patch documents the recent input-mt interface changes. Signed-off-by: Henrik Rydberg

input: mt: Add hovering distance axis

2010-12-16T09:42:29Z

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

Input: document the MT event slot protocol

2010-07-16T06:52:10Z

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 Signed-off-by: Henrik Rydberg Signed-off-by: Dmitry Torokhov

Input: update the status of the Multitouch X driver project

2010-03-22T05:39:33Z

The Multitouch X driver project has moved to alpha status. This patch updates the documentation accordingly. Signed-off-by: Henrik Rydberg Signed-off-by: Dmitry Torokhov