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,
49				   bool driver_power_control);
50int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
51					 const struct vga_switcheroo_client_ops *ops,
52					 int id, bool active);
53
54void vga_switcheroo_client_fb_set(struct pci_dev *dev,
55				  struct fb_info *info);
56
57int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
58void vga_switcheroo_unregister_handler(void);
59
60int vga_switcheroo_process_delayed_switch(void);
61
62int vga_switcheroo_get_client_state(struct pci_dev *dev);
63
64void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic);
65
66int vga_switcheroo_init_domain_pm_ops(struct device *dev, struct dev_pm_domain *domain);
67void vga_switcheroo_fini_domain_pm_ops(struct device *dev);
68int vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev, struct dev_pm_domain *domain);
69#else
70
71static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
72static inline int vga_switcheroo_register_client(struct pci_dev *dev,
73		const struct vga_switcheroo_client_ops *ops, bool driver_power_control) { return 0; }
74static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
75static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
76static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
77	const struct vga_switcheroo_client_ops *ops,
78	int id, bool active) { return 0; }
79static inline void vga_switcheroo_unregister_handler(void) {}
80static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
81static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }
82
83static inline void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic) {}
84
85static inline int vga_switcheroo_init_domain_pm_ops(struct device *dev, struct dev_pm_domain *domain) { return -EINVAL; }
86static inline void vga_switcheroo_fini_domain_pm_ops(struct device *dev) {}
87static inline int vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev, struct dev_pm_domain *domain) { return -EINVAL; }
88
89#endif
90#endif /* _LINUX_VGA_SWITCHEROO_H_ */
91