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authorHans de Goede <hdegoede@redhat.com>2014-07-08 10:47:21 +0200
committerMatthew Garrett <matthew.garrett@nebula.com>2014-08-16 01:23:50 -0700
commitd8c66f62992dac3a92cbc5f16791557100c7a068 (patch)
treee36c0ca00da555d77a4547bb7733edff0f2967ee
parentce363c2bcb2303e7fad3a79398db739c6995141b (diff)
downloadlinux-d8c66f62992dac3a92cbc5f16791557100c7a068.tar.gz
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: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
-rw-r--r--drivers/platform/x86/asus-wmi.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 3c6ccedc82b..70aec19f50f 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -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()) {