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

commit ad7997f upstream.

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: cd8e468 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jscissr

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.