__acpi_video_get_backlight_type
if (__acpi_video_get_backlight_type(false, &auto_detect) == acpi_backlight_video &&
EXPORT_SYMBOL(__acpi_video_get_backlight_type);
extern enum acpi_backlight_type __acpi_video_get_backlight_type(bool native,
return __acpi_video_get_backlight_type(false, NULL);
return __acpi_video_get_backlight_type(true, NULL) == acpi_backlight_native;