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diff --git a/sys/compat/linuxkpi/common/include/linux/backlight.h b/sys/compat/linuxkpi/common/include/linux/backlight.h
--- a/sys/compat/linuxkpi/common/include/linux/backlight.h
+++ b/sys/compat/linuxkpi/common/include/linux/backlight.h
@@ -79,10 +79,10 @@
linux_backlight_device_register(name, dev, data, ops, props)
#define backlight_device_unregister(bd) linux_backlight_device_unregister(bd)
-static inline void
+static inline int
backlight_update_status(struct backlight_device *bd)
{
- bd->ops->update_status(bd);
+ return (bd->ops->update_status(bd));
}
static inline void
@@ -91,4 +91,22 @@
bd->props.brightness = bd->ops->get_brightness(bd);
}
+static inline int
+backlight_enable(struct backlight_device *bd)
+{
+ if (bd == NULL)
+ return (0);
+ bd->props.power = 0/* FB_BLANK_UNBLANK */;
+ return (backlight_update_status(bd));
+}
+
+static inline int
+backlight_disable(struct backlight_device *bd)
+{
+ if (bd == NULL)
+ return (0);
+ bd->props.power = 4/* FB_BLANK_POWERDOWN */;
+ return (backlight_update_status(bd));
+}
+
#endif /* _LINUX_BACKLIGHT_H_ */
diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -1215,6 +1215,8 @@
pdev->dev.bd->props.brightness = pdev->dev.bd->props.max_brightness *
props->brightness / 100;
+ pdev->dev.bd->props.power = props->brightness == 0 ?
+ 4/* FB_BLANK_POWERDOWN */ : 0/* FB_BLANK_UNBLANK */;
return (pdev->dev.bd->ops->update_status(pdev->dev.bd));
}

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