Messages in this thread Patch in this message | | | From | Benjamin Tissoires <> | Subject | [PATCH v2 3/3] Input: synaptics - allocate 3 slots to keep stability in image sensors | Date | Tue, 31 Mar 2015 11:07:37 -0400 |
| |
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> ---
changes in v2: - acked by Hans
drivers/input/mouse/synaptics.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 02a12b694..b4c6717 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -1194,7 +1194,7 @@ 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); -- 2.3.4
| |