+static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
+static void acpi_video_device_rebind(struct acpi_video_bus *video);
+static void acpi_video_device_bind(struct acpi_video_bus *video,
+ struct acpi_video_device *device);
+static int acpi_video_device_enumerate(struct acpi_video_bus *video);
+static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
+static int acpi_video_get_next_level(struct acpi_video_device *device,
+ u32 level_current, u32 event);
+static void acpi_video_switch_brightness(struct acpi_video_device *device,
+ int event);