From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 20 Mar 2023 15:59:46 +0000 (+0100)
Subject: ACPI: video: Add backlight=native DMI quirk for Acer Aspire 3830TG
X-Git-Tag: v6.2.12~49
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c3ffa6723766c87c1a8b87bc61eee89245341892;p=thirdparty%2Fkernel%2Fstable.git

ACPI: video: Add backlight=native DMI quirk for Acer Aspire 3830TG

[ 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>
---

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index b3b0b06971df5..e85729fc481fd 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 */