This is the public API only, not the internal bits, so nothing will work just
yet.
This interface addition is for the Dell Canvas Totem tool, so let's go with
the same name because options like "Rotary" are too ambiguous.
The totem is a knob that can be placed on the surface, it provides us with
location and rotation data. The touch major/minor fields are filled in by the
current totem, but they're always the same size.
The totem exports BTN_0 as well, so let's add that to the debug-events output.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Follow-up to 6229df184e
We must not rely on the caller to toggle the left-handed bits correctly since
they may not know which devices belong together (despite device groups). Let's
do the right thing here, if the touchpad is set to left-handed, rotate the
tablet accordingly.
Note that the left-handed setting of the touchpad is left as-is
(right-handed). Until we have notifications about configuration changes, this
is the best we can do.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
There are tablets out there that *sometimes* send the right event sequence,
but are generally broken. So let's not disable that quirk even if we do get a
right sequence.
Affected devices: Lenovo Flex 5
Fixes#248Fixes#290
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Unlike virtually everything else, the tablet tool was processed at the time
the event was read rather than when the subsequent EV_SYN came in. This causes
difficulties with tablets that send the wrong BTN_TOOL_PEN events.
Moving the tool change processing to tablet_flush() makes the injection of the
BTN_TOOL_PEN event a lot easier, simply flipping the matching bit does the
job. It also makes it easier to ignore duplicate tool updates like we've seen
in #259.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
We expect the kernel to transition properly for us, e.g. BTN_TOOL_PEN goes to
0, BTN_TOOL_ERASER goes to 1. Two cases have surfaced recently where this
doesn't happen and debugging this takes time - so let's warn about it to make
it obvious.
Example 1: https://github.com/linuxwacom/libwacom/issues/70
Example 2: https://gitlab.freedesktop.org/libinput/libinput/issues/259
This is just a warning, nothing more. We should just handle that case
accordingly but that requires more effort.
Fixes#260
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
If the tilt angle on tip down is not 0 set the touch arbitration to a
rectangle around the assumed position of the hand. This assumed position is
right of the tip for a rightwards tilt and left of the tip for a leftwards
tilt (i.e. left-handed mode). The rectangle is 200x200mm with a 20x50mm
NW of the tip or NE for left-handed. In other words, if the period below is
the tip, the rectangle looks like this:
+-----------+ +-----------+
| . | <- for rightwards tilt | . |
| | | |
| | | |
| | for leftwards tilt -> | |
+-----------+ +-----------+
Touches within that rectangle are canceled, new touches are ignored. As the
tip moves around the rectangle is updated but touches are only cancelled on
the original tip down. While the tip is down, new touches are ignored in the
exclusion area but pre-existing touches are not cancelled.
This is currently only implemented in the fallback interface, i.e. it will
only work for Cintiqs.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Use the same blurb everywhere, changing from the old style MIT to the Expat
license we're using everywhere else.
Similar to bc9f16b40e
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
And instead disable it when we do get a proximity out.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Could be fixed in the kernel, but these tablets are effectively abandoned and
fixing them is a one-by-one issue. Let's put the infrastructure in place to
have this fixed once for this type of device and move on.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Yay-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
commit 3925936 introduced changes to container_of, this is hopefully the
last part of it.
In the linux kernel, container_of() takes a type name, and not a
variable. Without this, in some cases it is needed to declare an unused
variable in order to call container_of().
example:
return container_of(dispatch, struct fallback_dispatch, base);
instead of:
struct fallback_dispatch *p;
return container_of(dispatch, p, base);
This introduce also list_first_entry(), a simple wrapper around
container_of() to retrieve the first element of a non empty list. It
allows to simplify list_for_each() and list_for_each_safe().
Signed-off-by: Gabriel Laskar <gabriel@lse.epita.fr>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Taking the tablet events as-is produces the occasional wobble in what should
be a straight line. Bug 99961 has a jpg attachment to illustrate that.
Emulate the wacom driver behavior and average x/y across the last 4 values to
smoothen out these dents.
https://bugs.freedesktop.org/show_bug.cgi?id=99961
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Ping Cheng <pingc@wacom.com>
Stores the processed axes values in a history 4 events deep. Currently unused
but will be used to smoothen out axis values to avoid transducer-caused axis
wobbles.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Ping Cheng <pingc@wacom.com>
Set the dispatch type on creation, then check that whenever we try to get the
dispatch struct. This avoids a potential mismatch between the backends.
Plus, use of container_of means we're not dependent on the exact layout
anymore.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
So far we've relied on the wacom kernel module to do touch arbitration for us
but that won't be the case in upcoming kernels. Implement touch arbitration in
userspace by pairing the two devices and suspending the touch device whenever
a tool comes into proximity.
In the future more sophisticated arbitration can be done (e.g. only touches
which are close to the pen) but let's burn that bridge when we have to cross
it.
Note that touch arbitration is "device suspend light", i.e. we leave the
device enabled and the fd is active. Tablet interactions are comparatively
short-lived, so closing the fd and asking logind for a new one every time the
pen changes proximity is suboptimal. Instead, we just keep a boolean around
and discard all events while it is set.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
This is especially a problem for the cursor tool which can be legitimately
left on the tablet. It wobbles by a couple of device units, resulting in
continuous axis updates to the caller. Pre-filter any of these events by the
axis' fuzz value so we don't even process them.
For ABS_DISTANCE which doesn't have a fuzz we hard-code a minimum fuzz of 2.
This should eventually land in the kernel though.
https://bugs.freedesktop.org/show_bug.cgi?id=94892
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
Makes the code less generic, but more expressive. No visible functional
changes.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Jason Gerecke <jason.gerecke@wacom.com>
For the puck/lens cursor tool we need to artificially reduce proximity
detection. These tools are usually used in a relative mode (i.e. like a mouse)
and thus require lifting and resetting the tool multiple times to move across
the screen. The tablets' distance detection goes too far, requiring the user
to lift the device several cm on every move. This is uncomfortable.
Introduce an artificial distance threshold for the devices with the default
value taken from the X.Org wacom driver. If a tool is in proximity but outside
of this range, fake proximity events accordingly.
If a button was pressed while we were out of range we discard that event and
send it later when we enter proximity again.
This is the simple implementation that only takes one proximity out value (the
one from the wacom driver) and applies it to all. Those devices that support a
button/lens tool and have a different default threshold are well out of date.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
[rebased, tests updated for new axis percentage behavior (8d76734f)]
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
If a tool wears out, it may have a pre-loaded pressure offset. In that case,
even when the tool is not physically in contact with the tablet surface it
will send pressure events.
Use automatic pressure offset detection, similar to what the X.Org wacom
driver does. On proximity-in, check the pressure and if the distance is above
50% of the range and the pressure is nonzero but below 20% of the range, use
that value as pressure offset.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Ping Cheng <pingc@wacom.com>
If it's a finger, it's a touchscreen or a touchpad, not a tablet.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Behavior for axis events in the same event frame as the BTN_TOUCH is to
always send axis events before any tip state.
Behavior for button events in the same event frame as the BTN_TOUCH is to
order button events to happen when the tip is in proximity, i.e. after the tip
event on tip down and before the tip event on tip up.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
If a tool is in proximity when we init, send a proximity event immediately.
This is only partially reliable due to the current kernel behavior:
* if the tool comes into proximity when there is no evdev client, the device
won't send any events and must be lifted out-of-proximity first. Patch is in
the works, see https://patchwork.kernel.org/patch/5924611/
* before 3.19, if the tool was in proximity (with an evdev client attached),
but goes out of proximity and back in with no client connected, we get an
immediate proximity out event from the kernel once we connect to the device
and no further events after that.
See kernel commit b905811a49bcd6e6726ce5bbb591f57aaddfd3be
Otherwise, things work as expected. The above should be fixed in the kernel
anyway.
Note that this changes the order of events during a udev seat init, before we
had all DEVICE_ADDED events in a row, now the proximity event may be
interspersed.
Reported-by: Jason Gerecke <killertofu@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Providing a relative axis in the axis_get_value() is inconsistent with the
other axes, this will be fixed in a follow-up commit.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Stephen Chandler Paul <thatslyude@gmail.com>
The little wheel isn't a full wheel, it has a ~90 degree rotation angle with a
range of 1024 values. To avoid confusion with "wheel" elsewhere in the API
name it slider.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Stephen Chandler Paul <thatslyude@gmail.com>
Expand the mask to fit KEY_CNT buttons, the mouse has LMR buttons and a few
more, trying to squash the range is more error-prone than having the full key
range instead.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Stephen Chandler Paul <thatslyude@gmail.com>
The tool ID on wacom tablets is what really defines the tool, so one can
differ between say an Intuos Grip Pen, Art Pen or Classic Pen. They're all
BTN_TOOL_PEN in the kernel driver.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Stephen Chandler Paul <thatslyude@gmail.com>
This is only used internally.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Stephen Chandler Paul <thatslyude@gmail.com>
This constant isn't used in the public API, let's drop it. To make it easier
to use it internally and avoid accidental boolean comparisions with axes, bump
all real axes up to start at 1.
Internally that means we drop the AXIS_CNT since it'd be misleading and
instead use MAX or MAX + 1 everywhere.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Because the axes that tool reports can change depending on the tool in use, we
want to be able to provide functionality to determine which axes each tool can
support.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
With tablets that don't support serial numbers, we can't guarantee that the tool
objects are unique. Because of this, this can give clients the false impression
that a tool without a serial number is being shared between tablets when it very
well might not be. So we keep tools without serial numbers in a list that's
local to the tablet they belong to, and keep tools with serials in a list that's
global within the libinput context.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Since the orientation of the tablet can potentially change, this naming scheme
makes a lot more sense then VERTICAL and HORIZONTAL does since they don't
reflect the actual physical movement.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
A proximity-in event is something we want, especially since the current drafted
wayland spec has a proximity-in event. Adding this also makes our events more
consistent. And since we can just report the current tool in use with
proximity-in events, we can get rid of the tool-update event.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Because bad distance events still trigger calls to tablet_flush(),
tablet_flush() will see that the tablet is out of proximity and assume it's an
appropriate time to send a proximity-out event, even when we've already sent
one. This results in multiple proximity-out events being sent in a row instead
of just one.
In addition, the bad distance events test has been modified to pick up on this.
We shouldn't be receiving /any/ events when we get false distance events from
evdev anyway.
Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
