diff options
Diffstat (limited to 'include/linux/backlight.h')
| -rw-r--r-- | include/linux/backlight.h | 111 |
1 files changed, 37 insertions, 74 deletions
diff --git a/include/linux/backlight.h b/include/linux/backlight.h index 614653e07e3a..10e626db7eee 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -12,7 +12,7 @@ #include <linux/device.h> #include <linux/fb.h> #include <linux/mutex.h> -#include <linux/notifier.h> +#include <linux/types.h> /** * enum backlight_update_reason - what method was used to update backlight @@ -65,24 +65,6 @@ enum backlight_type { BACKLIGHT_TYPE_MAX, }; -/** - * enum backlight_notification - the type of notification - * - * The notifications that is used for notification sent to the receiver - * that registered notifications using backlight_register_notifier(). - */ -enum backlight_notification { - /** - * @BACKLIGHT_REGISTERED: The backlight device is registered. - */ - BACKLIGHT_REGISTERED, - - /** - * @BACKLIGHT_UNREGISTERED: The backlight revice is unregistered. - */ - BACKLIGHT_UNREGISTERED, -}; - /** enum backlight_scale - the type of scale used for brightness values * * The type of scale used for brightness values. @@ -110,7 +92,6 @@ enum backlight_scale { }; struct backlight_device; -struct fb_info; /** * struct backlight_ops - backlight operations @@ -160,18 +141,18 @@ struct backlight_ops { int (*get_brightness)(struct backlight_device *); /** - * @check_fb: Check the framebuffer device. + * @controls_device: Check against the display device * - * Check if given framebuffer device is the one bound to this backlight. - * This operation is optional and if not implemented it is assumed that the - * fbdev is always the one bound to the backlight. + * Check if the backlight controls the given display device. This + * operation is optional and if not implemented it is assumed that + * the display is always the one controlled by the backlight. * * RETURNS: * - * If info is NULL or the info matches the fbdev bound to the backlight return true. - * If info does not match the fbdev bound to the backlight return false. + * If display_dev is NULL or display_dev matches the device controlled by + * the backlight, return true. Otherwise return false. */ - int (*check_fb)(struct backlight_device *bd, struct fb_info *info); + bool (*controls_device)(struct backlight_device *bd, struct device *display_dev); }; /** @@ -209,33 +190,18 @@ struct backlight_properties { * attribute: /sys/class/backlight/<backlight>/bl_power * When the power property is updated update_status() is called. * - * The possible values are: (0: full on, 1 to 3: power saving - * modes; 4: full off), see FB_BLANK_XXX. + * The possible values are: (0: full on, 4: full off), see + * BACKLIGHT_POWER constants. * - * When the backlight device is enabled @power is set - * to FB_BLANK_UNBLANK. When the backlight device is disabled - * @power is set to FB_BLANK_POWERDOWN. + * When the backlight device is enabled, @power is set to + * BACKLIGHT_POWER_ON. When the backlight device is disabled, + * @power is set to BACKLIGHT_POWER_OFF. */ int power; - /** - * @fb_blank: The power state from the FBIOBLANK ioctl. - * - * When the FBIOBLANK ioctl is called @fb_blank is set to the - * blank parameter and the update_status() operation is called. - * - * When the backlight device is enabled @fb_blank is set - * to FB_BLANK_UNBLANK. When the backlight device is disabled - * @fb_blank is set to FB_BLANK_POWERDOWN. - * - * Backlight drivers should avoid using this property. It has been - * replaced by state & BL_CORE_FBLANK (although most drivers should - * use backlight_is_blank() as the preferred means to get the blank - * state). - * - * fb_blank is deprecated and will be removed. - */ - int fb_blank; +#define BACKLIGHT_POWER_ON (0) +#define BACKLIGHT_POWER_OFF (4) +#define BACKLIGHT_POWER_REDUCED (1) // deprecated; don't use in new code /** * @type: The type of backlight supported. @@ -312,11 +278,6 @@ struct backlight_device { const struct backlight_ops *ops; /** - * @fb_notif: The framebuffer notifier block - */ - struct notifier_block fb_notif; - - /** * @entry: List entry of all registered backlight devices */ struct list_head entry; @@ -327,15 +288,7 @@ struct backlight_device { struct device dev; /** - * @fb_bl_on: The state of individual fbdev's. - * - * Multiple fbdev's may share one backlight device. The fb_bl_on - * records the state of the individual fbdev. - */ - bool fb_bl_on[FB_MAX]; - - /** - * @use_count: The number of uses of fb_bl_on. + * @use_count: The number of unblanked displays. */ int use_count; }; @@ -365,8 +318,7 @@ static inline int backlight_enable(struct backlight_device *bd) if (!bd) return 0; - bd->props.power = FB_BLANK_UNBLANK; - bd->props.fb_blank = FB_BLANK_UNBLANK; + bd->props.power = BACKLIGHT_POWER_ON; bd->props.state &= ~BL_CORE_FBBLANK; return backlight_update_status(bd); @@ -381,8 +333,7 @@ static inline int backlight_disable(struct backlight_device *bd) if (!bd) return 0; - bd->props.power = FB_BLANK_POWERDOWN; - bd->props.fb_blank = FB_BLANK_POWERDOWN; + bd->props.power = BACKLIGHT_POWER_OFF; bd->props.state |= BL_CORE_FBBLANK; return backlight_update_status(bd); @@ -395,15 +346,13 @@ static inline int backlight_disable(struct backlight_device *bd) * Display is expected to be blank if any of these is true:: * * 1) if power in not UNBLANK - * 2) if fb_blank is not UNBLANK - * 3) if state indicate BLANK or SUSPENDED + * 2) if state indicate BLANK or SUSPENDED * * Returns true if display is expected to be blank, false otherwise. */ static inline bool backlight_is_blank(const struct backlight_device *bd) { - return bd->props.power != FB_BLANK_UNBLANK || - bd->props.fb_blank != FB_BLANK_UNBLANK || + return bd->props.power != BACKLIGHT_POWER_ON || bd->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK); } @@ -440,13 +389,27 @@ void devm_backlight_device_unregister(struct device *dev, struct backlight_device *bd); void backlight_force_update(struct backlight_device *bd, enum backlight_update_reason reason); -int backlight_register_notifier(struct notifier_block *nb); -int backlight_unregister_notifier(struct notifier_block *nb); struct backlight_device *backlight_device_get_by_name(const char *name); struct backlight_device *backlight_device_get_by_type(enum backlight_type type); int backlight_device_set_brightness(struct backlight_device *bd, unsigned long brightness); +#if IS_REACHABLE(CONFIG_BACKLIGHT_CLASS_DEVICE) +void backlight_notify_blank(struct backlight_device *bd, + struct device *display_dev, + bool fb_on, bool prev_fb_on); +void backlight_notify_blank_all(struct device *display_dev, + bool fb_on, bool prev_fb_on); +#else +static inline void backlight_notify_blank(struct backlight_device *bd, + struct device *display_dev, + bool fb_on, bool prev_fb_on) +{ } +static inline void backlight_notify_blank_all(struct device *display_dev, + bool fb_on, bool prev_fb_on) +{ } +#endif + #define to_backlight_device(obj) container_of(obj, struct backlight_device, dev) /** |