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 };
  16
  17 enum vga_switcheroo_client_id {
  18         VGA_SWITCHEROO_IGD,
  19         VGA_SWITCHEROO_DIS,
  20         VGA_SWITCHEROO_MAX_CLIENTS,
  21 };
  22
  23 struct vga_switcheroo_handler {
  24         int (*switchto)(enum vga_switcheroo_client_id id);
  25         int (*power_state)(enum vga_switcheroo_client_id id,
  26                            enum vga_switcheroo_state state);
  27         int (*init)(void);
  28         int (*get_client_id)(struct pci_dev *pdev);
  29 };
  30
  31
  32 #if defined(CONFIG_VGA_SWITCHEROO)
  33 void vga_switcheroo_unregister_client(struct pci_dev *dev);
  34 int vga_switcheroo_register_client(struct pci_dev *dev,
  35                                    void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
  36                                    bool (*can_switch)(struct pci_dev *dev));
  37
  38 void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  39                                   struct fb_info *info);
  40
  41 int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  42 void vga_switcheroo_unregister_handler(void);
  43
  44 int vga_switcheroo_process_delayed_switch(void);
  45
  46 #else
  47
  48 static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  49 static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  50                                           void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
  51                                           bool (*can_switch)(struct pci_dev *dev)) { return 0; }
  52 static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  53 static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  54 static inline void vga_switcheroo_unregister_handler(void) {}
  55 static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  56
  57 #endif