From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 20 Mar 2023 16:59:46 +0100
Subject: [PATCH] ACPI: video: Add backlight=native DMI quirk for Acer Aspire
 3830TG
References: bsc#1012628
Patch-mainline: 6.2.12
Git-commit: 5e7a3bf65db57461d0f47955248fcadf37321a74

[ Upstream commit 5e7a3bf65db57461d0f47955248fcadf37321a74 ]

The Acer Aspire 3830TG predates Windows 8, so it defaults to using
acpi_video# for backlight control, but this is non functional on
this model.

Add a DMI quirk to use the native backlight interface which does
work properly.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/acpi/video_detect.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index b3b0b069..e85729fc 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -532,6 +532,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
 		},
 	},
+	{
+	 .callback = video_detect_force_native,
+	 /* Acer Aspire 3830TG */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3830TG"),
+		},
+	},
 	{
 	 .callback = video_detect_force_native,
 	 /* Acer Aspire 4810T */
-- 
2.35.3