diff options
Diffstat (limited to 'drivers/video/backlight/backlight.c')
| -rw-r--r-- | drivers/video/backlight/backlight.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index a9c013bb9f20..157057c79ca3 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -40,6 +40,10 @@ static int fb_notifier_callback(struct notifier_block *self, if (!bd->ops->check_fb || bd->ops->check_fb(evdata->info)) { bd->props.fb_blank = *(int *)evdata->data; + if (bd->props.fb_blank == FB_BLANK_UNBLANK) + bd->props.state &= ~BL_CORE_FBBLANK; + else + bd->props.state |= BL_CORE_FBBLANK; backlight_update_status(bd); } mutex_unlock(&bd->ops_lock); @@ -165,6 +169,34 @@ static ssize_t backlight_show_actual_brightness(struct device *dev, static struct class *backlight_class; +static int backlight_suspend(struct device *dev, pm_message_t state) +{ + struct backlight_device *bd = to_backlight_device(dev); + + if (bd->ops->options & BL_CORE_SUSPENDRESUME) { + mutex_lock(&bd->ops_lock); + bd->props.state |= BL_CORE_SUSPENDED; + backlight_update_status(bd); + mutex_unlock(&bd->ops_lock); + } + + return 0; +} + +static int backlight_resume(struct device *dev) +{ + struct backlight_device *bd = to_backlight_device(dev); + + if (bd->ops->options & BL_CORE_SUSPENDRESUME) { + mutex_lock(&bd->ops_lock); + bd->props.state &= ~BL_CORE_SUSPENDED; + backlight_update_status(bd); + mutex_unlock(&bd->ops_lock); + } + + return 0; +} + static void bl_device_release(struct device *dev) { struct backlight_device *bd = to_backlight_device(dev); @@ -281,6 +313,8 @@ static int __init backlight_class_init(void) } backlight_class->dev_attrs = bl_device_attributes; + backlight_class->suspend = backlight_suspend; + backlight_class->resume = backlight_resume; return 0; } |