LXR linux/include/linux/vga

   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
  12enum vga_switcheroo_state {
  13        VGA_SWITCHEROO_OFF,
  14        VGA_SWITCHEROO_ON,
  15};
  16
  17enum vga_switcheroo_client_id {
  18        VGA_SWITCHEROO_IGD,
  19        VGA_SWITCHEROO_DIS,
  20        VGA_SWITCHEROO_MAX_CLIENTS,
  21};
  22
  23struct 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)
  33void vga_switcheroo_unregister_client(struct pci_dev *dev);
  34int vga_switcheroo_register_client(struct pci_dev *dev,
  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
  39void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  40                                  struct fb_info *info);
  41
  42int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  43void vga_switcheroo_unregister_handler(void);
  44
  45int vga_switcheroo_process_delayed_switch(void);
  46
  47#else
  48
  49static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  50static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  51                                          void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
  52                                          void (*reprobe)(struct pci_dev *dev),
  53                                          bool (*can_switch)(struct pci_dev *dev)) { return 0; }
  54static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  55static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  56static inline void vga_switcheroo_unregister_handler(void) {}
  57static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  58
  59#endif
  60