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Commit d8c66f62 authored by Hans de Goede's avatar Hans de Goede Committed by Matthew Garrett
Browse files

asus-wmi: Disable acpi-video backlight on desktop machines 

Some Asus motherboards for desktop PC-s export an acpi-video interface
advertising backlight support. Test the dmi chassis-type and tell acpi-video
to not register a backlight interface on desktops.

https://bugzilla.redhat.com/show_bug.cgi?id=1097436



Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
parent ce363c2b

drivers/platform/x86/asus-wmi.c

+7 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 
#include <linux/platform_device.h>

#include <linux/thermal.h>

#include <linux/acpi.h>

#include <linux/dmi.h>

#include <acpi/video.h>



#include "asus-wmi.h"
@@ -1734,6 +1735,7 @@ static int asus_wmi_add(struct platform_device *pdev) 
	struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);

	struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);

	struct asus_wmi *asus;

	const char *chassis_type;

	acpi_status status;

	int err;

	u32 result;
@@ -1770,6 +1772,11 @@ static int asus_wmi_add(struct platform_device *pdev) 
	if (err)

		goto fail_rfkill;



	/* Some Asus desktop boards export an acpi-video backlight interface,

	   stop this from showing up */

	chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);

	if (chassis_type && !strcmp(chassis_type, "3"))

		acpi_video_dmi_promote_vendor();

	if (asus->driver->quirks->wmi_backlight_power)

		acpi_video_dmi_promote_vendor();

	if (!acpi_video_backlight_support()) {