1#include <linux/vgaarb.h>
2#include <linux/vga_switcheroo.h>
3
4#include <drm/drmP.h>
5#include <drm/drm_crtc_helper.h>
6
7#include "nouveau_drm.h"
8#include "nouveau_acpi.h"
9#include "nouveau_fbcon.h"
10#include "nouveau_vga.h"
11
12static unsigned int
13nouveau_vga_set_decode(void *priv, bool state)
14{
15	struct nvif_device *device = &nouveau_drm(priv)->device;
16
17	if (device->info.family == NV_DEVICE_INFO_V0_CURIE &&
18	    device->info.chipset >= 0x4c)
19		nvif_wr32(device, 0x088060, state);
20	else
21	if (device->info.chipset >= 0x40)
22		nvif_wr32(device, 0x088054, state);
23	else
24		nvif_wr32(device, 0x001854, state);
25
26	if (state)
27		return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
28		       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
29	else
30		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
31}
32
33static void
34nouveau_switcheroo_set_state(struct pci_dev *pdev,
35			     enum vga_switcheroo_state state)
36{
37	struct drm_device *dev = pci_get_drvdata(pdev);
38
39	if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
40		return;
41
42	if (state == VGA_SWITCHEROO_ON) {
43		printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
44		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
45		nouveau_pmops_resume(&pdev->dev);
46		drm_kms_helper_poll_enable(dev);
47		dev->switch_power_state = DRM_SWITCH_POWER_ON;
48	} else {
49		printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
50		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
51		drm_kms_helper_poll_disable(dev);
52		nouveau_switcheroo_optimus_dsm();
53		nouveau_pmops_suspend(&pdev->dev);
54		dev->switch_power_state = DRM_SWITCH_POWER_OFF;
55	}
56}
57
58static void
59nouveau_switcheroo_reprobe(struct pci_dev *pdev)
60{
61	struct drm_device *dev = pci_get_drvdata(pdev);
62	nouveau_fbcon_output_poll_changed(dev);
63}
64
65static bool
66nouveau_switcheroo_can_switch(struct pci_dev *pdev)
67{
68	struct drm_device *dev = pci_get_drvdata(pdev);
69
70	/*
71	 * FIXME: open_count is protected by drm_global_mutex but that would lead to
72	 * locking inversion with the driver load path. And the access here is
73	 * completely racy anyway. So don't bother with locking for now.
74	 */
75	return dev->open_count == 0;
76}
77
78static const struct vga_switcheroo_client_ops
79nouveau_switcheroo_ops = {
80	.set_gpu_state = nouveau_switcheroo_set_state,
81	.reprobe = nouveau_switcheroo_reprobe,
82	.can_switch = nouveau_switcheroo_can_switch,
83};
84
85void
86nouveau_vga_init(struct nouveau_drm *drm)
87{
88	struct drm_device *dev = drm->dev;
89	bool runtime = false;
90
91	/* only relevant for PCI devices */
92	if (!dev->pdev)
93		return;
94
95	vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
96
97	if (nouveau_runtime_pm == 1)
98		runtime = true;
99	if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
100		runtime = true;
101	vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
102
103	if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
104		vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
105}
106
107void
108nouveau_vga_fini(struct nouveau_drm *drm)
109{
110	struct drm_device *dev = drm->dev;
111	bool runtime = false;
112
113	if (nouveau_runtime_pm == 1)
114		runtime = true;
115	if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
116		runtime = true;
117
118	vga_switcheroo_unregister_client(dev->pdev);
119	if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
120		vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
121	vga_client_register(dev->pdev, NULL, NULL, NULL);
122}
123
124
125void
126nouveau_vga_lastclose(struct drm_device *dev)
127{
128	vga_switcheroo_process_delayed_switch();
129}
130