Commit ad7997f5 authored by Jan Schär's avatar Jan Schär Committed by Rafael J. Wysocki
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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: cd8e468e ("ACPI: video: Add Dell UART backlight controller detection")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: default avatarJan Schär <jan@jschaer.ch>
Reviewed-by: default avatarHans de Goede <johannes.goede@oss.qualcomm.com>
Link: https://patch.msgid.link/20260411092606.47925-1-jan@jschaer.ch


Signed-off-by: default avatarRafael J. Wysocki <rjw@rjwysocki.net>
parent 2e31b161

drivers/acpi/video_detect.c

+8 −0
Original line number Diff line number Diff line
@@ -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.