ACPI: video: Add backlight=native DMI quirk for Apple iMac12,1 and iMac12,2

Linux defaults to picking the non-working ACPI video backlight interface
on the Apple iMac12,1 and iMac12,2.

Add a DMI quirk to pick the working native radeon_bl0 interface instead.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1838
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2753
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 0c376ed..442396f 100644 (file)
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -496,6 +496,24 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
                },
        },
        {
+        /* https://gitlab.freedesktop.org/drm/amd/-/issues/1838 */
+        .callback = video_detect_force_native,
+        /* Apple iMac12,1 */
+        .matches = {
+               DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+               DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,1"),
+               },
+       },
+       {
+        /* https://gitlab.freedesktop.org/drm/amd/-/issues/2753 */
+        .callback = video_detect_force_native,
+        /* Apple iMac12,2 */
+        .matches = {
+               DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+               DMI_MATCH(DMI_PRODUCT_NAME, "iMac12,2"),
+               },
+       },
+       {
         /* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
         .callback = video_detect_force_native,
         /* Apple MacBook Pro 12,1 */