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Commit 29807d1e authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Jiri Kosina
Browse files

Input: mt: add input_mt_is_used 



This patch extracts the test (slot->frame == mt->frame) so that it can
be used in third party drivers.

Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: default avatarHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent af8036dd

drivers/input/input-mt.c

+1 −1
Original line number Diff line number Diff line
@@ -247,7 +247,7 @@ void input_mt_sync_frame(struct input_dev *dev) 


	if (mt->flags & INPUT_MT_DROP_UNUSED) {

		for (s = mt->slots; s != mt->slots + mt->num_slots; s++) {

			if (s->frame == mt->frame)

			if (input_mt_is_used(mt, s))

				continue;

			input_mt_slot(dev, s - mt->slots);

			input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1);

include/linux/input/mt.h

+6 −0
Original line number Diff line number Diff line
@@ -69,6 +69,12 @@ static inline bool input_mt_is_active(const struct input_mt_slot *slot) 
	return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0;

}



static inline bool input_mt_is_used(const struct input_mt *mt,

				    const struct input_mt_slot *slot)

{

	return slot->frame == mt->frame;

}



int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots,

			unsigned int flags);

void input_mt_destroy_slots(struct input_dev *dev);