diff options
Diffstat (limited to 'include/linux/lcd.h')
| -rw-r--r-- | include/linux/lcd.h | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/include/linux/lcd.h b/include/linux/lcd.h index 238fb1dfed98..d4fa03722b72 100644 --- a/include/linux/lcd.h +++ b/include/linux/lcd.h @@ -11,8 +11,11 @@ #include <linux/device.h> #include <linux/mutex.h> -#include <linux/notifier.h> -#include <linux/fb.h> + +#define LCD_POWER_ON (0) +#define LCD_POWER_REDUCED (1) // deprecated; don't use in new code +#define LCD_POWER_REDUCED_VSYNC_SUSPEND (2) // deprecated; don't use in new code +#define LCD_POWER_OFF (4) /* Notes on locking: * @@ -30,7 +33,6 @@ */ struct lcd_device; -struct fb_info; struct lcd_properties { /* The maximum value for contrast (read-only) */ @@ -47,11 +49,23 @@ struct lcd_ops { int (*get_contrast)(struct lcd_device *); /* Set LCD panel contrast */ int (*set_contrast)(struct lcd_device *, int contrast); - /* Set LCD panel mode (resolutions ...) */ - int (*set_mode)(struct lcd_device *, struct fb_videomode *); - /* Check if given framebuffer device is the one LCD is bound to; - return 0 if not, !=0 if it is. If NULL, lcd always matches the fb. */ - int (*check_fb)(struct lcd_device *, struct fb_info *); + + /* + * Set LCD panel mode (resolutions ...) + */ + int (*set_mode)(struct lcd_device *lcd, u32 xres, u32 yres); + + /* + * Check if the LCD 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 LCD. + * + * RETURNS: + * + * If display_dev is NULL or display_dev matches the device controlled by + * the LCD, return true. Otherwise return false. + */ + bool (*controls_device)(struct lcd_device *lcd, struct device *display_device); }; struct lcd_device { @@ -61,11 +75,14 @@ struct lcd_device { points to something in the body of that driver, it is also invalid. */ struct mutex ops_lock; /* If this is NULL, the backing module is unloaded */ - struct lcd_ops *ops; + const struct lcd_ops *ops; /* Serialise access to set_power method */ struct mutex update_lock; - /* The framebuffer notifier block */ - struct notifier_block fb_notif; + + /** + * @entry: List entry of all registered lcd devices + */ + struct list_head entry; struct device dev; }; @@ -102,14 +119,27 @@ static inline void lcd_set_power(struct lcd_device *ld, int power) } extern struct lcd_device *lcd_device_register(const char *name, - struct device *parent, void *devdata, struct lcd_ops *ops); + struct device *parent, void *devdata, const struct lcd_ops *ops); extern struct lcd_device *devm_lcd_device_register(struct device *dev, const char *name, struct device *parent, - void *devdata, struct lcd_ops *ops); + void *devdata, const struct lcd_ops *ops); extern void lcd_device_unregister(struct lcd_device *ld); extern void devm_lcd_device_unregister(struct device *dev, struct lcd_device *ld); +#if IS_REACHABLE(CONFIG_LCD_CLASS_DEVICE) +void lcd_notify_blank_all(struct device *display_dev, int power); +void lcd_notify_mode_change_all(struct device *display_dev, + unsigned int width, unsigned int height); +#else +static inline void lcd_notify_blank_all(struct device *display_dev, int power) +{} + +static inline void lcd_notify_mode_change_all(struct device *display_dev, + unsigned int width, unsigned int height) +{} +#endif + #define to_lcd_device(obj) container_of(obj, struct lcd_device, dev) static inline void * lcd_get_data(struct lcd_device *ld_dev) |