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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2015-04-05 23:45:04 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-04-06 19:38:07 +0300
commit63c4fda3c0bb841b1aad1298fc7fe94058fc79f8 (patch)
tree6f2df1c77b8ffc246d254d3d3df4e2c4ab835684 /drivers/input
parent58fd9af6e1ccabec6bc799b32eea22a82103d5ae (diff)
downloadlinux-63c4fda3c0bb841b1aad1298fc7fe94058fc79f8.tar.xz
Input: synaptics - allocate 3 slots to keep stability in image sensors
When slowly dropping 1, 2 and then 3 fingers on an image sensor touchpad, we can see that the first finger gets reassigned a new slot while it did not move. This is due to the kernel tracking algorithm which can not assign correctly the 3 touches, being out of slots. Declaring that we support 3 slots allows to actually forward: slot 0 -> down, slot 1 -> up, slot 2 -> down Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Henrik Rydberg <rydberg@bitmath.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/mouse/synaptics.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 3c54b9b0f65f..95898333834f 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -1189,7 +1189,7 @@ static void set_input_params(struct psmouse *psmouse,
ABS_MT_POSITION_Y);
/* Image sensors can report per-contact pressure */
input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
- input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
+ input_mt_init_slots(dev, 3, INPUT_MT_POINTER | INPUT_MT_TRACK);
/* Image sensors can signal 4 and 5 finger clicks */
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);