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 <acpi/acpi.h>
  11 #include <linux/fb.h>
  12
  13 enum vga_switcheroo_state {
  14         VGA_SWITCHEROO_OFF,
  15         VGA_SWITCHEROO_ON,
  16 };
  17
  18 enum vga_switcheroo_client_id {
  19         VGA_SWITCHEROO_IGD,
  20         VGA_SWITCHEROO_DIS,
  21         VGA_SWITCHEROO_MAX_CLIENTS,
  22 };
  23
  24 struct vga_switcheroo_handler {
  25         int (*switchto)(enum vga_switcheroo_client_id id);
  26         int (*power_state)(enum vga_switcheroo_client_id id,
  27                            enum vga_switcheroo_state state);
  28         int (*init)(void);
  29         int (*get_client_id)(struct pci_dev *pdev);
  30 };
  31
  32
  33 #if defined(CONFIG_VGA_SWITCHEROO)
  34 void vga_switcheroo_unregister_client(struct pci_dev *dev);
  35 int vga_switcheroo_register_client(struct pci_dev *dev,
  36                                    void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
  37                                    bool (*can_switch)(struct pci_dev *dev));
  38
  39 void vga_switcheroo_client_fb_set(struct pci_dev *dev,
  40                                   struct fb_info *info);
  41
  42 int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
  43 void vga_switcheroo_unregister_handler(void);
  44
  45 int vga_switcheroo_process_delayed_switch(void);
  46
  47 #else
  48
  49 static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
  50 static inline int vga_switcheroo_register_client(struct pci_dev *dev,
  51                                           void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
  52                                           bool (*can_switch)(struct pci_dev *dev)) { return 0; }
  53 static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
  54 static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
  55 static inline void vga_switcheroo_unregister_handler(void) {}
  56 static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
  57
  58 #endif