Hid Compliant Touchpad Driver Exclusive | INSTANT | 2025 |

struct input_dev *input = hdev->input; int contact_count = data[0]; // First byte: number of touches int offset = 1; int i, slot, id; for (i = 0; i < contact_count && offset + 5 < size; i++) (data[offset + 5] << 8)); slot = input_mt_get_slot_by_key(input, tracking_id); if (slot < 0) continue; input_mt_slot(input, slot); input_mt_report_slot_state(input, MT_TOOL_FINGER, tip_switch); if (tip_switch) input_report_abs(input, ABS_MT_TRACKING_ID, tracking_id); input_report_abs(input, ABS_MT_POSITION_X, x); input_report_abs(input, ABS_MT_POSITION_Y, y); offset += 6;

| OS | Latency (ms) | Max touches | Gestures supported | Quirks | |----|--------------|-------------|--------------------|--------| | Linux 6.1 | 6.2 | 5 | 2-finger scroll, pinch | None | | Windows 11 | 8.5 | 5 | 3-finger swipe | Requires .inf | | macOS 13 | 12.0 | 5 | Only basic | Needs IOKit wrapper | hid compliant touchpad driver

if (count == 2) int dx = touches[1].x - touches[0].x; int dy = touches[1].y - touches[0].y; static int old_dist = 0; int new_dist = abs(dx) + abs(dy); if (old_dist && abs(new_dist - old_dist) > THRESHOLD) report_pinch(new_dist - old_dist); old_dist = new_dist; struct input_dev *input = hdev-&gt

static int tp_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) int contact_count = data[0]