+ /*
+ * Tell acpi-video-detect code to prefer vendor backlight on all
+ * systems with transflective backlight and on dmi matched systems.
+ */
+ if (dev->tr_backlight_supported ||
+ dmi_check_system(toshiba_vendor_backlight_dmi))
+ acpi_video_dmi_promote_vendor();
+
+ if (acpi_video_backlight_support())
+ return 0;
+
+ /* acpi-video may have loaded before we called dmi_promote_vendor() */
+ acpi_video_unregister_backlight();
+