diff options
Diffstat (limited to 'drivers/input/input-mt.c')
| -rw-r--r-- | drivers/input/input-mt.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index c0ec7d42c3b..d398f1321f1 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -18,6 +18,7 @@ static void copy_abs(struct input_dev *dev, unsigned int dst, unsigned int src) { if (dev->absinfo && test_bit(src, dev->absbit)) { dev->absinfo[dst] = dev->absinfo[src]; + dev->absinfo[dst].fuzz = 0; dev->absbit[BIT_WORD(dst)] |= BIT_MASK(dst); } } @@ -26,10 +27,14 @@ static void copy_abs(struct input_dev *dev, unsigned int dst, unsigned int src) * input_mt_init_slots() - initialize MT input slots * @dev: input device supporting MT events and finger tracking * @num_slots: number of slots used by the device + * @flags: mt tasks to handle in core * * This function allocates all necessary memory for MT slot handling * in the input device, prepares the ABS_MT_SLOT and * ABS_MT_TRACKING_ID events for use and sets up appropriate buffers. + * Depending on the flags set, it also performs pointer emulation and + * frame synchronization. + * * May be called repeatedly. Returns -EINVAL if attempting to * reinitialize with a different number of slots. */ @@ -74,6 +79,8 @@ int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots, } if (flags & INPUT_MT_DIRECT) __set_bit(INPUT_PROP_DIRECT, dev->propbit); + if (flags & INPUT_MT_SEMI_MT) + __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); if (flags & INPUT_MT_TRACK) { unsigned int n2 = num_slots * num_slots; mt->red = kcalloc(n2, sizeof(*mt->red), GFP_KERNEL); @@ -190,7 +197,7 @@ void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count) if (!mt) return; - oldest = 0; + oldest = NULL; oldid = mt->trkid; count = 0; @@ -241,20 +248,24 @@ void input_mt_sync_frame(struct input_dev *dev) { struct input_mt *mt = dev->mt; struct input_mt_slot *s; + bool use_count = false; if (!mt) return; 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); } } - input_mt_report_pointer_emulation(dev, (mt->flags & INPUT_MT_POINTER)); + if ((mt->flags & INPUT_MT_POINTER) && !(mt->flags & INPUT_MT_SEMI_MT)) + use_count = true; + + input_mt_report_pointer_emulation(dev, use_count); mt->frame++; } |