drivers/video/fbdev/core/fb_internal.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef _FB_INTERNAL_H
   4 #define _FB_INTERNAL_H
   5
   6 #include <linux/device.h>
   7 #include <linux/fb.h>
   8 #include <linux/mutex.h>
   9
  10 /* fb_devfs.c */
  11 #if defined(CONFIG_FB_DEVICE)
  12 int fb_register_chrdev(void);
  13 void fb_unregister_chrdev(void);
  14 #else
  15 static inline int fb_register_chrdev(void)
  16 {
  17         return 0;
  18 }
  19 static inline void fb_unregister_chrdev(void)
  20 { }
  21 #endif
  22
  23 /* fb_logo.c */
  24 #if defined(CONFIG_LOGO)
  25 extern bool fb_center_logo;
  26 extern int fb_logo_count;
  27 int fb_prepare_logo(struct fb_info *fb_info, int rotate);
  28 int fb_show_logo(struct fb_info *fb_info, int rotate);
  29 #else
  30 static inline int fb_prepare_logo(struct fb_info *info, int rotate)
  31 {
  32         return 0;
  33 }
  34 static inline int fb_show_logo(struct fb_info *info, int rotate)
  35 {
  36         return 0;
  37 }
  38 #endif /* CONFIG_LOGO */
  39
  40 /* fbmem.c */
  41 extern struct class *fb_class;
  42 extern struct mutex registration_lock;
  43 extern struct fb_info *registered_fb[FB_MAX];
  44 extern int num_registered_fb;
  45 struct fb_info *get_fb_info(unsigned int idx);
  46 void put_fb_info(struct fb_info *fb_info);
  47
  48 /* fb_procfs.c */
  49 #if defined(CONFIG_FB_DEVICE)
  50 int fb_init_procfs(void);
  51 void fb_cleanup_procfs(void);
  52 #else
  53 static inline int fb_init_procfs(void)
  54 {
  55         return 0;
  56 }
  57 static inline void fb_cleanup_procfs(void)
  58 { }
  59 #endif
  60
  61 /* fbsysfs.c */
  62 #if defined(CONFIG_FB_DEVICE)
  63 int fb_device_create(struct fb_info *fb_info);
  64 void fb_device_destroy(struct fb_info *fb_info);
  65 #else
  66 static inline int fb_device_create(struct fb_info *fb_info)
  67 {
  68         /*
  69          * Acquire a reference on the parent device to avoid
  70          * unplug operations behind our back. With the fbdev
  71          * device enabled, this is performed within register_device().
  72          */
  73         get_device(fb_info->device);
  74
  75         return 0;
  76 }
  77 static inline void fb_device_destroy(struct fb_info *fb_info)
  78 {
  79         /* Undo the get_device() from fb_device_create() */
  80         put_device(fb_info->device);
  81 }
  82 #endif
  83
  84 #endif