ACPI / video: Add a quirk to force acpi-video backlight on SAMSUNG 530U4E/540U4E

The native interface on SAMSUNG 530U4E/540U4E doesn't work even though
the firmware claims Win8 compatible while the acpi_video interface
works, add a quirk for this.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=108971
Reported-and-tested-by: adam bk <adamdd55@gmail.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 8fe2682380e9..90e2d54be526 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -250,6 +250,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
                 DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
                 },
         },
+        {
+         /* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
+         .callback = video_detect_force_video,
+         .ident = "SAMSUNG 530U4E/540U4E",
+         .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
+                },
+        },
 
         /* Non win8 machines which need native backlight nevertheless */
         {