input_mt_init_slots — initialize MT input slots
int input_mt_init_slots ( | struct input_dev * dev, |
| unsigned int num_slots, | |
unsigned int flags); |
devinput device supporting MT events and finger tracking
num_slotsnumber of slots used by the device
flagsmt 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.