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Input: mt: add input_mt_is_used

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

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2012-11-14 16:59:22 +01:00 committed by Jiri Kosina
parent af8036dd74
commit 29807d1e24
2 changed files with 7 additions and 1 deletions
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2
drivers/input/input-mt.c
View File

@ -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);

6
include/linux/input/mt.h
View File

@ -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);