[PATCH] ACPI: Add DMI quirk for GIGABYTE GB-BXBT-2807

[PATCH] ACPI: Add DMI quirk for GIGABYTE GB-BXBT-2807

[Chris Chiu]

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

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>
---
 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 2499d7e3c710..ac2e194acdbf 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"),
-- 
2.20.1

Re: [PATCH] ACPI: Add DMI quirk for GIGABYTE GB-BXBT-2807

[Rafael J. Wysocki]

On Wed, Dec 2, 2020 at 7:41 AM Chris Chiu <chiu@endlessos.org> wrote:
>
> From: "Jasper St. Pierre" <jstpierre@mecheye.net>
>
> 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>
> ---
>  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 2499d7e3c710..ac2e194acdbf 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"),
> --

Applied as 5.11 material, thanks!