diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/input/mt.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h index 94989189878d..6b6f7c8e95bf 100644 --- a/include/linux/input/mt.h +++ b/include/linux/input/mt.h @@ -18,6 +18,8 @@ #define INPUT_MT_POINTER 0x0001 /* pointer device, e.g. trackpad */ #define INPUT_MT_DIRECT 0x0002 /* direct device, e.g. touchscreen */ #define INPUT_MT_DROP_UNUSED 0x0004 /* drop contacts not seen in frame */ +#define INPUT_MT_TRACK 0x0008 /* use in-kernel tracking */ + /** * struct input_mt_slot - represents the state of an input MT slot * @abs: holds current values of ABS_MT axes for this slot @@ -35,6 +37,7 @@ struct input_mt_slot { * @slot: MT slot currently being transmitted * @flags: input_mt operation flags * @frame: increases every time input_mt_sync_frame() is called + * @red: reduced cost matrix for in-kernel tracking * @slots: array of slots holding current values of tracked contacts */ struct input_mt { @@ -43,6 +46,7 @@ struct input_mt { int slot; unsigned int flags; unsigned int frame; + int *red; struct input_mt_slot slots[]; }; @@ -58,6 +62,11 @@ static inline int input_mt_get_value(const struct input_mt_slot *slot, return slot->abs[code - ABS_MT_FIRST]; } +static inline bool input_mt_is_active(const struct input_mt_slot *slot) +{ + return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0; +} + 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); @@ -90,4 +99,16 @@ void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count); void input_mt_sync_frame(struct input_dev *dev); +/** + * struct input_mt_pos - contact position + * @x: horizontal coordinate + * @y: vertical coordinate + */ +struct input_mt_pos { + s16 x, y; +}; + +int input_mt_assign_slots(struct input_dev *dev, int *slots, + const struct input_mt_pos *pos, int num_pos); + #endif |