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-rw-r--r--include/linux/input/mt.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h
index cc5cca774ba..2e86bd0bfba 100644
--- a/include/linux/input/mt.h
+++ b/include/linux/input/mt.h
@@ -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);