Change sendevents configuration to use bitmasks

In the future, we should allow multiple sendevent modes set simultanously.
Change the API to use a bitmask instead of a single return value.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
evdev: factor out resolution changing code

No functional changes.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
evdev: move a comment to where it belongs

And s/weston/libinput/ while we're at it

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
evdev: handle fake MT devices

The kernel requires absolute axes to fit into the semantic ABS_ naming
scheme but doesn't provide enough free bits unlabelled axes. Devices with many
axes run into the ABS_MT range and look like MT devices when they're not.
See http://www.freedesktop.org/software/libevdev/doc/1.3/group__mt.html

Affected is e.g. the MS Surface 2 touch cover that has codes [41, 62]
set for min/max [-127, 127].

No special handling needed other than forcing has_mt/has_touch to be 0.
ABS_MT_* events from non-touch devices are discarded by libinput.

The has_mt/has_touch = 0 isn't needed, but looks nicer than an empty if
body.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=85836

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
test: add the MS surface touch cover device and fake-mt tests

In the device description, define the interfaces for touch down/move even
though we technically don't have those interfaces. Makes it easier to test.

The fake-mt tests make sure the device shows up correctly and that no touch
events are being sent for touch events.
This device is a pointer device too, the pointer tests will test it for
correct functionality of the REL_X/Y bits, no special test needed.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
util: introduce ratelimit helpers

This adds "struct ratelimit" and "ratelimit_test()". It's a very simple
rate-limit helper modeled after Linux' lib/ratelimit.c by Dave Young.

This comes in handy to limit log-messages in possible busy loops etc..

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
evdev: ratelimit SYN_DROPPED logging

Use the ratelimit helpers for SYN_DROPPED logging. This guarantees that we
will still receive SYN_DROPPED log-messages after multiple days of
runtime, even though there might have been a SYN_DROPPED flood at one
point in time.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>