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 #ifndef _LINUX_VGA_SWITCHEROO_H_
  11 #define _LINUX_VGA_SWITCHEROO_H_
  12
  13 #include <linux/fb.h>
  14
  15 struct pci_dev;
  16
  17 enum vga_switcheroo_state {
  18         VGA_SWITCHEROO_OFF,
  19         VGA_SWITCHEROO_ON,
  20         /* below are referred only from vga_switcheroo_get_client_state() */
  21         VGA_SWITCHEROO_INIT,
  22         VGA_SWITCHEROO_NOT_FOUND,
  23 };
  24
  25 enum vga_switcheroo_client_id {
  26         VGA_SWITCHEROO_IGD,
  27         VGA_SWITCHEROO_DIS,
  28         VGA_SWITCHEROO_MAX_CLIENTS,
  29 };
  30
  31 struct vga_switcheroo_handler {
  32         int (*switchto)(enum vga_switcheroo_client_id id);
  33         int (*power_state)(enum vga_switcheroo_client_id id,
  34                            enum vga_switcheroo_state state);
  35         int (*init)(void);
  36         int (*get_client_id)(struct pci_dev *pdev);
  37 };
  38
  39 struct vga_switcheroo_client_ops {
  40         void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state);
  41         void (*reprobe)(struct pci_dev *dev);
  42         bool (*can_switch)(struct pci_dev *dev);
  43 };
  44
  45 #if defined(CONFIG_VGA_SWITCHEROO)
  46 void vga_switcheroo_unregister_client(struct pci_dev *dev);
  47 int vga_switcheroo_register_client(struct pci_dev *dev,
  48                                    const struct vga_switcheroo_client_ops *ops);
  49 int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  50                                          const struct vga_switcheroo_client_ops *ops,
  51                                          int id, bool active);
  52
  53 void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  54                                   struct fb_info *info);
  55
  56 int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  57 void vga_switcheroo_unregister_handler(void);
  58
  59 int vga_switcheroo_process_delayed_switch(void);
  60
  61 int vga_switcheroo_get_client_state(struct pci_dev *dev);
  62
  63 #else
  64
  65 static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  66 static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  67                 const struct vga_switcheroo_client_ops *ops) { return 0; }
  68 static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  69 static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  70 static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  71         const struct vga_switcheroo_client_ops *ops,
  72         int id, bool active) { return 0; }
  73 static inline void vga_switcheroo_unregister_handler(void) {}
  74 static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  75 static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }
  76
  77
  78 #endif
  79 #endif /* _LINUX_VGA_SWITCHEROO_H_ */