linux/include/linux/vga_switcheroo.h
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   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
  15struct pci_dev;
  16
  17enum 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
  25enum vga_switcheroo_client_id {
  26        VGA_SWITCHEROO_IGD,
  27        VGA_SWITCHEROO_DIS,
  28        VGA_SWITCHEROO_MAX_CLIENTS,
  29};
  30
  31struct 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
  39struct 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)
  46void vga_switcheroo_unregister_client(struct pci_dev *dev);
  47int vga_switcheroo_register_client(struct pci_dev *dev,
  48                                   const struct vga_switcheroo_client_ops *ops);
  49int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
  50                                         const struct vga_switcheroo_client_ops *ops,
  51                                         int id, bool active);
  52
  53void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  54                                  struct fb_info *info);
  55
  56int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  57void vga_switcheroo_unregister_handler(void);
  58
  59int vga_switcheroo_process_delayed_switch(void);
  60
  61int vga_switcheroo_get_client_state(struct pci_dev *dev);
  62
  63#else
  64
  65static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  66static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  67                const struct vga_switcheroo_client_ops *ops) { return 0; }
  68static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  69static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  70static 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; }
  73static inline void vga_switcheroo_unregister_handler(void) {}
  74static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  75static 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_ */
  80
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