return AE_OK;
}
+/* Force to use vendor driver when the ACPI device is known to be
+ * buggy */
+static int video_detect_force_vendor(const struct dmi_system_id *d)
+{
+ acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
+ return 0;
+}
+
+static struct dmi_system_id video_detect_dmi_table[] = {
+ /* On Samsung X360, the BIOS will set a flag (VDRV) if generic
+ * ACPI backlight device is used. This flag will definitively break
+ * the backlight interface (even the vendor interface) untill next
+ * reboot. It's why we should prevent video.ko from being used here
+ * and we can't rely on a later call to acpi_video_unregister().
+ */
+ {
+ .callback = video_detect_force_vendor,
+ .ident = "X360",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
+ DMI_MATCH(DMI_BOARD_NAME, "X360"),
+ },
+ },
+ { },
+};
+
/*
* Returns the video capabilities of a specific ACPI graphics device
*
* ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
*}
*/
+
+ dmi_check_system(video_detect_dmi_table);
} else {
status = acpi_bus_get_device(graphics_handle, &tmp_dev);
if (ACPI_FAILURE(status)) {