vga_switcheroo: initial implementation (v15)
[linux-2.6.git] / 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