From: Benjamin Tissoires Date: Sun, 5 Apr 2015 20:45:04 +0000 (-0700) Subject: Input: synaptics - allocate 3 slots to keep stability in image sensors X-Git-Tag: v5.15~74^2~762 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=63c4fda3c0bb841b1aad1298fc7fe94058fc79f8;p=platform%2Fkernel%2Flinux-starfive.git 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 Acked-by: Hans de Goede Acked-by: Henrik Rydberg --- diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 3c54b9b..9589833 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);