[PATCH AUTOSEL 5.4 090/130] ACPI: video: Add DMI quirk for GIGABYTE GB-BXBT-2807

Sasha Levin
2020-12-23T02:59:25Z

From: "Jasper St. Pierre" <jstpierre@mecheye.net>

[ Upstream commit 25417185e9b5ff90746d50769d2a3fcd1629e254 ]

The GIGABYTE GB-BXBT-2807 is a mini-PC which uses off the shelf
components, like an Intel GPU which is meant for mobile systems.
As such, it, by default, has a backlight controller exposed.

Unfortunately, the backlight controller only confuses userspace, which
sees the existence of a backlight device node and has the unrealistic
belief that there is actually a backlight there!

Add a DMI quirk to force the backlight off on this system.

Signed-off-by: Jasper St. Pierre <jstpierre@mecheye.net>
Reviewed-by: Chris Chiu <chiu@endlessos.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/acpi/video_detect.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 55af78b55c513..301ffe5b8feb0 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -143,6 +143,13 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_vendor,
+ .ident = "GIGABYTE GB-BXBT-2807",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "GB-BXBT-2807"),
+ },
+ },
+ {
.ident = "Sony VPCEH3U1E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
--
2.27.0