diff options
| -rw-r--r-- | drivers/video/backlight/backlight.c | 87 | ||||
| -rw-r--r-- | drivers/video/backlight/lcd.c | 78 |
2 files changed, 104 insertions, 61 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index f439a588394..1dac9e74342 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -14,6 +14,59 @@ #include <linux/err.h> #include <linux/fb.h> + +#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \ + defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)) +/* This callback gets called when something important happens inside a + * framebuffer driver. We're looking if that important event is blanking, + * and if it is, we're switching backlight power as well ... + */ +static int fb_notifier_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct backlight_device *bd; + struct fb_event *evdata = data; + + /* If we aren't interested in this event, skip it immediately ... */ + if (event != FB_EVENT_BLANK) + return 0; + + bd = container_of(self, struct backlight_device, fb_notif); + down(&bd->sem); + if (bd->props) + if (!bd->props->check_fb || + bd->props->check_fb(evdata->info)) { + bd->props->fb_blank = *(int *)evdata->data; + if (likely(bd->props && bd->props->update_status)) + bd->props->update_status(bd); + } + up(&bd->sem); + return 0; +} + +static int backlight_register_fb(struct backlight_device *bd) +{ + memset(&bd->fb_notif, 0, sizeof(bd->fb_notif)); + bd->fb_notif.notifier_call = fb_notifier_callback; + + return fb_register_client(&bd->fb_notif); +} + +static void backlight_unregister_fb(struct backlight_device *bd) +{ + fb_unregister_client(&bd->fb_notif); +} +#else +static inline int backlight_register_fb(struct backlight_device *bd) +{ + return 0; +} + +static inline void backlight_unregister_fb(struct backlight_device *bd) +{ +} +#endif /* CONFIG_FB */ + static ssize_t backlight_show_power(struct class_device *cdev, char *buf) { int rc = -ENXIO; @@ -151,33 +204,6 @@ static const struct class_device_attribute bl_class_device_attributes[] = { DECLARE_ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL), }; -/* This callback gets called when something important happens inside a - * framebuffer driver. We're looking if that important event is blanking, - * and if it is, we're switching backlight power as well ... - */ -static int fb_notifier_callback(struct notifier_block *self, - unsigned long event, void *data) -{ - struct backlight_device *bd; - struct fb_event *evdata =(struct fb_event *)data; - - /* If we aren't interested in this event, skip it immediately ... */ - if (event != FB_EVENT_BLANK) - return 0; - - bd = container_of(self, struct backlight_device, fb_notif); - down(&bd->sem); - if (bd->props) - if (!bd->props->check_fb || - bd->props->check_fb(evdata->info)) { - bd->props->fb_blank = *(int *)evdata->data; - if (likely(bd->props && bd->props->update_status)) - bd->props->update_status(bd); - } - up(&bd->sem); - return 0; -} - /** * backlight_device_register - create and register a new object of * backlight_device class. @@ -215,10 +241,7 @@ error: kfree(new_bd); return ERR_PTR(rc); } - memset(&new_bd->fb_notif, 0, sizeof(new_bd->fb_notif)); - new_bd->fb_notif.notifier_call = fb_notifier_callback; - - rc = fb_register_client(&new_bd->fb_notif); + rc = backlight_register_fb(new_bd); if (unlikely(rc)) goto error; @@ -268,7 +291,7 @@ void backlight_device_unregister(struct backlight_device *bd) bd->props = NULL; up(&bd->sem); - fb_unregister_client(&bd->fb_notif); + backlight_unregister_fb(bd); class_device_unregister(&bd->class_dev); } diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c index 58c37d48910..f6e041627ed 100644 --- a/drivers/video/backlight/lcd.c +++ b/drivers/video/backlight/lcd.c @@ -14,6 +14,53 @@ #include <linux/err.h> #include <linux/fb.h> +#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \ + defined(CONFIG_LCD_CLASS_DEVICE_MODULE)) +/* This callback gets called when something important happens inside a + * framebuffer driver. We're looking if that important event is blanking, + * and if it is, we're switching lcd power as well ... + */ +static int fb_notifier_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct lcd_device *ld; + struct fb_event *evdata = data; + + /* If we aren't interested in this event, skip it immediately ... */ + if (event != FB_EVENT_BLANK) + return 0; + + ld = container_of(self, struct lcd_device, fb_notif); + down(&ld->sem); + if (ld->props) + if (!ld->props->check_fb || ld->props->check_fb(evdata->info)) + ld->props->set_power(ld, *(int *)evdata->data); + up(&ld->sem); + return 0; +} + +static int lcd_register_fb(struct lcd_device *ld) +{ + memset(&ld->fb_notif, 0, sizeof(&ld->fb_notif)); + ld->fb_notif.notifier_call = fb_notifier_callback; + return fb_register_client(&ld->fb_notif); +} + +static void lcd_unregister_fb(struct lcd_device *ld) +{ + fb_unregister_client(&ld->fb_notif); +} +#else +static int lcd_register_fb(struct lcd_device *ld) +{ + return 0; +} + +static inline void lcd_unregister_fb(struct lcd_device *ld) +{ +} +#endif /* CONFIG_FB */ + static ssize_t lcd_show_power(struct class_device *cdev, char *buf) { int rc; @@ -127,29 +174,6 @@ static const struct class_device_attribute lcd_class_device_attributes[] = { DECLARE_ATTR(max_contrast, 0444, lcd_show_max_contrast, NULL), }; -/* This callback gets called when something important happens inside a - * framebuffer driver. We're looking if that important event is blanking, - * and if it is, we're switching lcd power as well ... - */ -static int fb_notifier_callback(struct notifier_block *self, - unsigned long event, void *data) -{ - struct lcd_device *ld; - struct fb_event *evdata =(struct fb_event *)data; - - /* If we aren't interested in this event, skip it immediately ... */ - if (event != FB_EVENT_BLANK) - return 0; - - ld = container_of(self, struct lcd_device, fb_notif); - down(&ld->sem); - if (ld->props) - if (!ld->props->check_fb || ld->props->check_fb(evdata->info)) - ld->props->set_power(ld, *(int *)evdata->data); - up(&ld->sem); - return 0; -} - /** * lcd_device_register - register a new object of lcd_device class. * @name: the name of the new object(must be the same as the name of the @@ -186,10 +210,8 @@ error: kfree(new_ld); return ERR_PTR(rc); } - memset(&new_ld->fb_notif, 0, sizeof(new_ld->fb_notif)); - new_ld->fb_notif.notifier_call = fb_notifier_callback; + rc = lcd_register_fb(new_ld); - rc = fb_register_client(&new_ld->fb_notif); if (unlikely(rc)) goto error; @@ -232,9 +254,7 @@ void lcd_device_unregister(struct lcd_device *ld) down(&ld->sem); ld->props = NULL; up(&ld->sem); - - fb_unregister_client(&ld->fb_notif); - + lcd_unregister_fb(ld); class_device_unregister(&ld->class_dev); } EXPORT_SYMBOL(lcd_device_unregister); |