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    • Peter Hutterer's avatar
      Revert "Support the new Lenovo X1 Carbon 3rd trackpoint buttons" · 5378a020
      Peter Hutterer authored 
      This reverts commit 06444536.

The Lenovo *50 series, including the X1 Carbon 3rd always require multiple
kernel patches to enable the touchpad buttons. This patch in synaptics only
addresses the re-routing of the top buttons.

The final iteration of the kernel patches also route the trackpoint buttons
through the trackpoint device, rendering this patch unnecessary. These patches
are queued for 4.0.

See kernel patch series up to commit cdd9dc195916ef5644cfac079094c3c1d1616e4c
Author: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date:   Sun Mar 8 22:35:41 2015 -0700

    Input: synaptics - re-route tracksticks buttons on the Lenovo 2015 series

Currently in Dmitry's for-linus branch.

Distributions running older kernels or the kernel stable series which has
partial backports of the above patch series are encouraged to leave the
06444536

 commit in and undo this revert.
Signed-off-by: Peter Hutterer's avatarPeter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
      5378a020
  53. 06 Mar, 2015 1 commit
  55. 18 Feb, 2015 1 commit
  57. 29 Jan, 2015 1 commit
    • Peter Hutterer's avatar
      Support the new Lenovo X1 Carbon 3rd trackpoint buttons · 06444536
      Peter Hutterer authored 
      

This device has the trackpoint buttons wired up to the touchpad to send BTN_0,
BTN_1 and BTN_2 for left, right, middle. This conflicts with previous
touchpads that used those event codes for dedicated scroll buttons.

Add an option HasTrackpointButtons that can be set via a xorg.conf.d
snippets. This option is not intended as a user-set option, rather
we expect distributions to ship some conglomerate of udev/hal rules with
xorg.conf snippets that take effect.

If the option is set, we look at the three affected buttons at the beginning
of HandleState and send button events immediately for them. The HW state is
reset to neutral and other processing continues. This saves us from having to
synchronize these buttons with software buttons (also present on this device),
tapping, etc.

Since the buttons are physically different and (mentally) associated with the
trackpoint device we also don't need to worry about having finger motion event
correctly synced up with the button presses - it's acceptable to send the
presses before the motion events.
Signed-off-by: Peter Hutterer's avatarPeter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Tested-by: Benjamin Tissoires's avatarBenjamin Tissoires <benjamin.tissoires@gmail.com>
      06444536
  59. 16 Jan, 2015 1 commit
  61. 12 Jan, 2015 1 commit
  63. 07 Jan, 2015 1 commit
  65. 17 Sep, 2014 2 commits
    • Gabriele Mazzotta's avatar
      Use ABS_MT events for the palm detection when supported · a897147b
      Gabriele Mazzotta authored and Peter Hutterer's avatar Peter Hutterer committed 
      

Use ABS_MT_TOUCH_MAJOR and ABS_MT_PRESSURE instead of ABS_TOOL_WIDTH
and ABS_PRESSURE when supported so that the pressure and the width of
all the fingers is taken into account for the palm detection.

This also fixes the palm detection for those touchpads for which the
kernel only sends ABS_MT_TOUCH_MAJOR and not ABS_TOOL_WIDTH.
Signed-off-by: Gabriele Mazzotta's avatarGabriele Mazzotta <gabriele.mzt@gmail.com>
Signed-off-by: Peter Hutterer's avatarPeter Hutterer <peter.hutterer@who-t.net>
      a897147b
    • Peter Hutterer's avatar
      Limit the movement to 20 mm per event · 41b2312c
      Peter Hutterer authored 
      

Touchpads are limited by a fixed sampling rate (usually 80Hz). Some finger
changes may happen too fast for this sampling rate, resulting in two distinct
event sequences:
* finger 1 up and finger 2 down in the same EV_SYN frame. Synaptics sees one
  finger down before and after and the changed coordinates
* finger 1 up and finger 2 down _between_ two EV_SYN frames. Synaptics sees one
  touchpoint move from f1 position to f2 position.

That move causes a large cursor jump. The former could be solved (with
difficulty) by adding fake EV_SYN handling after releasing touchpoints but
that won't fix the latter case.

So as a solution for now limit the finger movement to 20mm per event.
Tests on a T440 and an x220 showed that this is just above what a reasonable
finger movement would trigger. If a movement is greater than that limit, reset
it to 0/0.

On devices without resolution, use 0.25 of the touchpad's diagonal instead.
Signed-off-by: Peter Hutterer's avatarPeter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
      41b2312c