diff options
Diffstat (limited to 'include/linux/input/mt.h')
| -rw-r--r-- | include/linux/input/mt.h | 57 |
1 files changed, 54 insertions, 3 deletions
diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h index f86737586e19..cc5cca774bab 100644 --- a/include/linux/input/mt.h +++ b/include/linux/input/mt.h @@ -15,12 +15,41 @@ #define TRKID_MAX 0xffff +#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 + * @frame: last frame at which input_mt_report_slot_state() was called + * @key: optional driver designation of this slot */ struct input_mt_slot { int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; + unsigned int frame; + unsigned int key; +}; + +/** + * struct input_mt - state of tracked contacts + * @trkid: stores MT tracking ID for the next contact + * @num_slots: number of MT slots the device uses + * @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 { + int trkid; + int num_slots; + int slot; + unsigned int flags; + unsigned int frame; + int *red; + struct input_mt_slot slots[]; }; static inline void input_mt_set_value(struct input_mt_slot *slot, @@ -35,12 +64,18 @@ static inline int input_mt_get_value(const struct input_mt_slot *slot, return slot->abs[code - ABS_MT_FIRST]; } -int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots); +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); -static inline int input_mt_new_trkid(struct input_dev *dev) +static inline int input_mt_new_trkid(struct input_mt *mt) { - return dev->trkid++ & TRKID_MAX; + return mt->trkid++ & TRKID_MAX; } static inline void input_mt_slot(struct input_dev *dev, int slot) @@ -64,4 +99,20 @@ void input_mt_report_slot_state(struct input_dev *dev, void input_mt_report_finger_count(struct input_dev *dev, int count); 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); + +int input_mt_get_slot_by_key(struct input_dev *dev, int key); + #endif |