evdev: Add parentheses around '-' expression in operand of '&'.

This fixes a -Wparentheses error with GCC 9.

Reviewed by: wulf
Differential Revision: https://reviews.freebsd.org/D31947

(cherry pic

evdev: Add parentheses around '-' expression in operand of '&'.

This fixes a -Wparentheses error with GCC 9.

Reviewed by: wulf
Differential Revision: https://reviews.freebsd.org/D31947

(cherry picked from commit d99c87c8d54a02a229cbeaa19ec8784b1d5afbb9)

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evdev: Add support for automatic MT protocol type A to type B conversion.

(cherry picked from commit d056693d7bc6c1b5f2c1612e5b34807f173e21c7)

evdev: Add implicit mode for touch tracking.

In implicit mode assignment of slot number and tracking id is performed
automatically on each synchronization requested by device driver.

This is done w

evdev: Add implicit mode for touch tracking.

In implicit mode assignment of slot number and tracking id is performed
automatically on each synchronization requested by device driver.

This is done with creation of intermediate buffer for multitouch events.
This buffer holds untracked events until synchronization is requested by
device driver. It is needed as touch assigment requires
knowledges of all touch positions pushed in current and previous reports.

(cherry picked from commit f76051c7dabe952b75127a8031d87d78b603be20)

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evdev: Import support for touch-tracking.

Touch tracking is a process of assignment of unique trackingID to each
initiated contact on the surface. Keeping the trackingIDs persistent
across multitou

evdev: Import support for touch-tracking.

Touch tracking is a process of assignment of unique trackingID to each
initiated contact on the surface. Keeping the trackingIDs persistent
across multitouch reports requires solving of so called Euclidian
Bipartite Matching problem.

This commit imports EBM-solver implementation based on Dinitz-Kronrod
algorithm to find minimum cost matching between contacts listed in two
consecutive reports.

Obtained from: OpenBSD

(cherry picked from commit 4c0a134e32a7f4dec556fea15c8de22f69864492)

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evdev: Make MT tracking IDs monotonically increasing sequence.

(cherry picked from commit 66bd52f5e241bd2548015f847f12cdff69176c40)

evdev: Give short aliases to items of evdev_mt_slot array

with using of unioned anonymous structure.

Access to the same data by using different members of union generally
works despite it is not su

evdev: Give short aliases to items of evdev_mt_slot array

with using of unioned anonymous structure.

Access to the same data by using different members of union generally
works despite it is not supported by C specs.

Also add helper function to report entire slot state.

(cherry picked from commit 059360287e3344f48f5a7839e2d6d54016b18b19)

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evdev: Normalize width and pressure of single touch compat events

to match Synaptics touchpad reporting range.

(cherry picked from commit 127e54deb6d8899e1dc1bc6251d512e19f21b0f1)

evdev: force no fuzz for autogenerated single touch compat events.

As fuzz has already been applied on multitouch event processing.
This allows to remove existing workaround for double fuzz procesin

evdev: force no fuzz for autogenerated single touch compat events.

As fuzz has already been applied on multitouch event processing.
This allows to remove existing workaround for double fuzz procesing.

(cherry picked from commit 314913ed7c6e6e1b7c80a1063620f478961419b7)

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evdev: Send first active rather than 0-th slot state as ST report

(cherry picked from commit fbe17f9017e785dd564ce7fc5553a9136d3a0b03)

evdev: Use bitsets to track active touches and slots changed in current report

Obtained from: OpenBSD

(cherry picked from commit 2dc7188e532f0147b36a44ce5c033d9f59cbd9f4)

evdev: Multitouch code style changes.

1. Move touch count reporting helpers to utils. They are not multitouch.
2. Use evdev_mt prefix for private multitouch support routines.
3. Use int instead of i

evdev: Multitouch code style changes.

1. Move touch count reporting helpers to utils. They are not multitouch.
2. Use evdev_mt prefix for private multitouch support routines.
3. Use int instead of int32_t where fixed size is not required.
4. Export some internal functions.

This change should be no-op.

(cherry picked from commit 98a7606b85e05132f328a2498dccab78df31cb7e)

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evdev: Remove useless "initial value" parameter from evdev_support_abs()

It can not be used for setting of state of multitouch events.
If necessary, use evdev_push_event() instead of it.

Change my email address to [email protected] in copyright headers.

Approved by: gonzo (mentor)
MFC after: 2 weeks

evdev: Macroize common locking sequences

Reviewed by: gonzo
Approved by: gonzo (mentor)
MFC after: 2 weeks

evdev: style(9), sort headers alphabetically

Pointed out by: bde
Reviewed by: gonzo
Approved by: gonzo (mentor)
MFC after: 2 weeks

Implement EVDEV_FLAG_MT_AUTOREL flag (autorelease touchpoints)

Automaticaly release (send ABS_MT_TRACKING_ID = -1) MT-slots
that has not been listed in current MT protocol type B report.

Slot is co

Implement EVDEV_FLAG_MT_AUTOREL flag (autorelease touchpoints)

Automaticaly release (send ABS_MT_TRACKING_ID = -1) MT-slots
that has not been listed in current MT protocol type B report.

Slot is counted as listed if corresponding ABS_MT_SLOT event
has been sent regardless of other MT events.

Events are sent on SYN_REPORT event.

Submitted by: Vladimir Kondratiev <[email protected]>

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Allow using of driver's mutex instead internal one for evdev locking.

Add new API call: evdev_register_mtx which takes lock argument that
should be used instead of internal one for evdev locking. Us

Allow using of driver's mutex instead internal one for evdev locking.

Add new API call: evdev_register_mtx which takes lock argument that
should be used instead of internal one for evdev locking. Useful for
cases if evdev_push_event() is always called with driver's lock taken
and reduces amount of lock aquisitions. This allows to avoid LOR
between ev_open/ev_close invocations and evdev_push_event() Such LOR
can happen when ev_open/ev_close methods acquire driver lock and
evdev_push_event() is called with this lock taken.

Submitted by: Vladimir Kondratiev <[email protected]>

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Add evdev protocol implementation

evdev is a generic input event interface compatible with Linux
evdev API at ioctl level. It allows using unmodified (apart from
header name) input evdev drivers in

Add evdev protocol implementation

evdev is a generic input event interface compatible with Linux
evdev API at ioctl level. It allows using unmodified (apart from
header name) input evdev drivers in Xorg, Wayland, Qt.

This commit has only generic kernel API. evdev support for individual
hardware drivers like ukbd, ums, atkbd, etc. will be committed later.

Project was started by Jakub Klama as part of GSoC 2014. Jakub's
evdev implementation was later used as a base, updated and finished
by Vladimir Kondratiev.

Submitted by: Vladimir Kondratiev <[email protected]>
Reviewed by: adrian, hans
Differential Revision: https://reviews.freebsd.org/D6998

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