include/linux/vga_switcheroo.h

   1 /*
   2  * Copyright (c) 2010 Red Hat Inc.
   3  * Author : Dave Airlie <airlied@redhat.com>
   4  *
   5  * Licensed under GPLv2
   6  *
   7  * vga_switcheroo.h - Support for laptop with dual GPU using one set of outputs
   8  */
   9
  10 #include <linux/fb.h>
  11
  12 enum vga_switcheroo_state {
  13         VGA_SWITCHEROO_OFF,
  14         VGA_SWITCHEROO_ON,
  15         /* below are referred only from vga_switcheroo_get_client_state() */
  16         VGA_SWITCHEROO_INIT,
  17         VGA_SWITCHEROO_NOT_FOUND,
  18 };
  19
  20 enum vga_switcheroo_client_id {
  21         VGA_SWITCHEROO_IGD,
  22         VGA_SWITCHEROO_DIS,
  23         VGA_SWITCHEROO_MAX_CLIENTS,
  24 };
  25
  26 struct vga_switcheroo_handler {
  27         int (*switchto)(enum vga_switcheroo_client_id id);
  28         int (*power_state)(enum vga_switcheroo_client_id id,
  29                            enum vga_switcheroo_state state);
  30         int (*init)(void);
  31         int (*get_client_id)(struct pci_dev *pdev);
  32 };
  33
  34 struct vga_switcheroo_client_ops {
  35         void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state);
  36         void (*reprobe)(struct pci_dev *dev);
  37         bool (*can_switch)(struct pci_dev *dev);
  38 };
  39
  40 #if defined(CONFIG_VGA_SWITCHEROO)
  41 void vga_switcheroo_unregister_client(struct pci_dev *dev);
  42 int vga_switcheroo_register_client(struct pci_dev *dev,
  43                                    const struct vga_switcheroo_client_ops *ops);
  44 int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  45                                          const struct vga_switcheroo_client_ops *ops,
  46                                          int id, bool active);
  47
  48 void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  49                                   struct fb_info *info);
  50
  51 int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  52 void vga_switcheroo_unregister_handler(void);
  53
  54 int vga_switcheroo_process_delayed_switch(void);
  55
  56 int vga_switcheroo_get_client_state(struct pci_dev *dev);
  57
  58 #else
  59
  60 static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  61 static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  62                 const struct vga_switcheroo_client_ops *ops) { return 0; }
  63 static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  64 static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  65 static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  66         const struct vga_switcheroo_client_ops *ops,
  67         int id, bool active) { return 0; }
  68 static inline void vga_switcheroo_unregister_handler(void) {}
  69 static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  70 static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }
  71
  72
  73 #endif