ACPI: video: Add backlight=native DMI quirk for Dell Studio 1569

The Dell Studio 1569 predates Windows 8, so it defaults to using
acpi_video# for backlight control, but this is non functional on
this model.

Add a DMI quirk to use the native intel_backlight interface which
does work properly.

Reported-by: raycekarneal <raycekarneal@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index eb014c0..18cc08c 100644 (file)
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -530,6 +530,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
        },
        {
         .callback = video_detect_force_native,
+        /* Dell Studio 1569 */
+        .matches = {
+               DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+               DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1569"),
+               },
+       },
+       {
+        .callback = video_detect_force_native,
         /* Acer Aspire 3830TG */
         .matches = {
                DMI_MATCH(DMI_SYS_VENDOR, "Acer"),