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 struct pci_dev;
  13
  14 enum vga_switcheroo_state {
  15         VGA_SWITCHEROO_OFF,
  16         VGA_SWITCHEROO_ON,
  17         /* below are referred only from vga_switcheroo_get_client_state() */
  18         VGA_SWITCHEROO_INIT,
  19         VGA_SWITCHEROO_NOT_FOUND,
  20 };
  21
  22 enum vga_switcheroo_client_id {
  23         VGA_SWITCHEROO_IGD,
  24         VGA_SWITCHEROO_DIS,
  25         VGA_SWITCHEROO_MAX_CLIENTS,
  26 };
  27
  28 struct vga_switcheroo_handler {
  29         int (*switchto)(enum vga_switcheroo_client_id id);
  30         int (*power_state)(enum vga_switcheroo_client_id id,
  31                            enum vga_switcheroo_state state);
  32         int (*init)(void);
  33         int (*get_client_id)(struct pci_dev *pdev);
  34 };
  35
  36 struct vga_switcheroo_client_ops {
  37         void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state);
  38         void (*reprobe)(struct pci_dev *dev);
  39         bool (*can_switch)(struct pci_dev *dev);
  40 };
  41
  42 #if defined(CONFIG_VGA_SWITCHEROO)
  43 void vga_switcheroo_unregister_client(struct pci_dev *dev);
  44 int vga_switcheroo_register_client(struct pci_dev *dev,
  45                                    const struct vga_switcheroo_client_ops *ops);
  46 int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  47                                          const struct vga_switcheroo_client_ops *ops,
  48                                          int id, bool active);
  49
  50 void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  51                                   struct fb_info *info);
  52
  53 int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  54 void vga_switcheroo_unregister_handler(void);
  55
  56 int vga_switcheroo_process_delayed_switch(void);
  57
  58 int vga_switcheroo_get_client_state(struct pci_dev *dev);
  59
  60 #else
  61
  62 static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  63 static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  64                 const struct vga_switcheroo_client_ops *ops) { return 0; }
  65 static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  66 static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  67 static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  68         const struct vga_switcheroo_client_ops *ops,
  69         int id, bool active) { return 0; }
  70 static inline void vga_switcheroo_unregister_handler(void) {}
  71 static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  72 static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }
  73
  74
  75 #endif