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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>
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@ -1189,7 +1189,7 @@ static void set_input_params(struct psmouse *psmouse,
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ABS_MT_POSITION_Y);
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/* Image sensors can report per-contact pressure */
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input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
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input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
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input_mt_init_slots(dev, 3, INPUT_MT_POINTER | INPUT_MT_TRACK);
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/* Image sensors can signal 4 and 5 finger clicks */
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__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
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