Hid Compliant Touchpad Driver Hot! -

input_mt_sync_frame(input); input_sync(input); return 0; The driver optionally performs basic gesture detection (two-finger scroll, pinch) before passing events up.

// Send sleep command to touchpad over HID u8 sleep_cmd[] = 0x00, 0x02; // Vendor-specific sleep opcode hid_hw_raw_request(hdev, 0x02, sleep_cmd, 2, HID_FEATURE_REPORT, HID_REQ_SET_REPORT); return 0; 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; // Vendor-specific sleep opcode hid_hw_raw_request(hdev

For low-level drivers, gestures can be delegated to userspace (e.g., libinput). Touchpad drivers must support suspend/resume and idle power reduction. int dy = touches[1].y - touches[0].y