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path: root/include/linux/input/mt.h
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2020-05-12Input: introduce input_mt_report_slot_inactive()Jiada Wang1-0/+5
input_mt_report_slot_state() ignores "tool" argument when the slot is closed, which has caused a bit of confusion. Let's introduce input_mt_report_slot_inactive() to report inactive slot state. Suggested-by: Dmitry Torokhov <[email protected]> Signed-off-by: Jiada Wang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Dmitry Torokhov <[email protected]>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner1-4/+1
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Enrico Weigelt <[email protected]> Reviewed-by: Kate Stewart <[email protected]> Reviewed-by: Allison Randal <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2018-06-11Input: make input_report_slot_state() return booleanDmitry Torokhov1-1/+1
Let's make input_report_slot_state() return boolean representing whether the contact is active or not. This will allow writing code like: if (input_mt_report_slot_state(input, obj->mt_tool, obj->type != RMI_2D_OBJECT_NONE) { input_event(sensor->input, EV_ABS, ABS_MT_POSITION_X, obj->x); input_event(sensor->input, EV_ABS, ABS_MT_POSITION_Y, obj->y); ... } instead of: input_mt_report_slot_state(input, obj->mt_tool, obj->type != RMI_2D_OBJECT_NONE); if (obj->type != RMI_2D_OBJECT_NONE) { input_event(sensor->input, EV_ABS, ABS_MT_POSITION_X, obj->x); input_event(sensor->input, EV_ABS, ABS_MT_POSITION_Y, obj->y); ... } Reviewed-by: Henrik Rydberg <[email protected]> Acked-by: Benjamin Tissoires <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2015-02-01Input: MT - add support for balanced slot assignmentHenrik Rydberg1-1/+2
Some devices are not fast enough to differentiate between a fast-moving contact and a new contact. This problem cannot be fully resolved because information is truly missing, but it is possible to safe-guard against obvious mistakes by restricting movement with a maximum displacement. The new problem formulation for dmax > 0 cannot benefit from the speedup for positive definite matrices, but since the convergence is faster, the result is about the same. For a handful of contacts, the latency difference is truly negligible. Suggested-by: Benjamin Tissoires <[email protected]> Tested-by: Benjamin Tissoires <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2014-08-07Input: MT - make slot cleanup callable outside mt_sync_frame()Henrik Rydberg1-0/+1
Some semi-mt drivers use the slots in a manual way, but may still want to call parts of the frame synchronization logic. This patch makes input_mt_drop_unused callable from those drivers. Signed-off-by: Henrik Rydberg <[email protected]> Reviewed-by: Benson Leung <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2013-04-07Input: MT - handle semi-mt devices in coreHenrik Rydberg1-0/+1
Most semi-mt drivers use the slots in a manual way, but really only need to treat the finger count manually. With this patch, a semi-mt driver may use the input-mt core for everything else. Signed-off-by: Henrik Rydberg <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2012-11-15Input: mt: add input_mt_is_usedBenjamin Tissoires1-0/+6
This patch extracts the test (slot->frame == mt->frame) so that it can be used in third party drivers. Signed-off-by: Benjamin Tissoires <[email protected]> Reviewed-by: Henrik Rydberg <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2012-09-19Input: MT - Get slot by keyHenrik Rydberg1-0/+4
Some devices use an internal key for tracking which cannot be directly mapped to slots. This patch provides a key-to-slot mapping, which can be used by drivers of such devices. Reviewed-and-tested-by: Benjamin Tissoires <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]>
2012-09-19Input: MT - Add in-kernel trackingHenrik Rydberg1-0/+21
With the INPUT_MT_TRACK flag set, the function input_mt_assign_slots() can be used to match a new set of contacts against the currently used slots. The algorithm used is based on Lagrange relaxation, and performs very well in practice; slower than mtdev for a few corner cases, but faster in most commonly occuring cases. Tested-by: Benjamin Tissoires <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]>
2012-09-19Input: MT - Handle frame synchronization in coreHenrik Rydberg1-0/+9
Most MT drivers perform the same actions on frame synchronization. Some actions, like dropping unseen contacts, are also unnecessarily complex. Collect common frame synchronization tasks in a new function, input_mt_sync_frame(). Depending on the flags set, it drops unseen contacts and performs pointer emulation. With init flags and frame synchronization in place, most MT drivers can be simplified. First out are the bcm5974 and hid-multitouch drivers, following this patch. Reviewed-and-tested-by: Benjamin Tissoires <[email protected]> Tested-by: Ping Cheng <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]>
2012-09-19Input: MT - Add flags to input_mt_init_slots()Henrik Rydberg1-1/+4
Preparing to move more repeated code into the mt core, add a flags argument to the input_mt_slots_init() function. Reviewed-and-tested-by: Benjamin Tissoires <[email protected]> Tested-by: Ping Cheng <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]>
2012-09-19Input: Break out MT dataHenrik Rydberg1-2/+16
Move all MT-related things to a separate place. This saves some bytes for non-mt input devices, and prepares for new MT features. Reviewed-and-tested-by: Benjamin Tissoires <[email protected]> Tested-by: Ping Cheng <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]>
2012-02-02Input: Use accessor for MT valuesHenrik Rydberg1-2/+6
The current MT accessor function does not distinguish between the MT values and the slot specification event. Add an accessor function for the values only, and use it where appropriate. Signed-off-by: Henrik Rydberg <[email protected]>
2011-04-18Input: estimate number of events per packetJeff Brown1-0/+6
Calculate a default based on the number of ABS axes, REL axes, and MT slots for the device during input device registration. Signed-off-by: Jeff Brown <[email protected]> Reviewed-by: Henrik Rydberg <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2010-12-16input: mt: Move tracking and pointer emulation to input-mtHenrik Rydberg1-0/+13
The drivers using the type B protocol all report tracking information the same way. The contact id is semantically equivalent to ABS_MT_SLOT, and the handling of ABS_MT_TRACKING_ID only complicates the driver. The situation can be improved upon by providing a common pointer emulation code, thereby removing the need for the tracking id in the driver. This patch moves all tracking event handling over to the input core, simplifying both the existing drivers and the ones currently in preparation. Acked-by: Ping Cheng <[email protected]> Acked-by: Jiri Kosina <[email protected]> Signed-off-by: Henrik Rydberg <[email protected]>
2010-12-16input: mt: Collect slots initialization codeHenrik Rydberg1-1/+1
The MT slots devices all follow the same initialization pattern of creating slots and hinting about buffer size. Let drivers call an initialization function instead, and make sure it can be called repeatedly without side effects. Signed-off-by: Henrik Rydberg <[email protected]>
2010-12-16input: mt: Break out slots handlingHenrik Rydberg1-0/+44
In preparation for common code to handle a larger set of MT slots devices, move the slots handling over to a separate file. Signed-off-by: Henrik Rydberg <[email protected]>
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