ACPI: video: Add backlight=native quirk for Dell OptiPlex 7770 AIO

The Dell OptiPlex 7770 AIO needs the same quirk as the 7760 AIO. The
backlight can be controlled with the native controller, intel_backlight,
but not with dell_uart_backlight.

I dumped the DSDT using acpidump, acpixtract and iasl, and confirmed
that it contains the DELL0501 device. When loading the
dell_uart_backlight driver with `rmmod dell_uart_backlight`, `modprobe
dell_uart_backlight dyndbg`, it reports "Firmware version: GL_Re_V18".

Fixes: cd8e468efb4f ("ACPI: video: Add Dell UART backlight controller detection")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Jan Schär <jan@jschaer.ch>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Link: https://patch.msgid.link/20260411092606.47925-1-jan@jschaer.ch
Signed-off-by: Rafael J. Wysocki <rjw@rjwysocki.net>

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 4cf74f173c785d435709c9d6792421f308909b39..4a2132ae28b4d5e6f8b64f5267dbf8a11278bf46 100644 (file)
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -878,6 +878,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
                DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7760 AIO"),
                },
        },
+       {
+        .callback = video_detect_force_native,
+        /* Dell OptiPlex 7770 AIO */
+        .matches = {
+               DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+               DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7770 AIO"),
+               },
+       },
 
        /*
         * Models which have nvidia-ec-wmi support, but should not use it.