summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/gpu/drm/nouveau/nouveau_vga.c
blob: af89c3665b2abc5e8db0d9b13a9f921879208d5b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>

#include "nouveau_drm.h"
#include "nouveau_acpi.h"
#include "nouveau_fbcon.h"
#include "nouveau_vga.h"

static unsigned int
nouveau_vga_set_decode(void *priv, bool state)
{
	struct nouveau_drm *drm = nouveau_drm(priv);
	struct nvif_object *device = &drm->device.object;

	if (drm->device.info.family == NV_DEVICE_INFO_V0_CURIE &&
	    drm->device.info.chipset >= 0x4c)
		nvif_wr32(device, 0x088060, state);
	else
	if (drm->device.info.chipset >= 0x40)
		nvif_wr32(device, 0x088054, state);
	else
		nvif_wr32(device, 0x001854, state);

	if (state)
		return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
		       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
	else
		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
}

static void
nouveau_switcheroo_set_state(struct pci_dev *pdev,
			     enum vga_switcheroo_state state)
{
	struct drm_device *dev = pci_get_drvdata(pdev);

	if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
		return;

	if (state == VGA_SWITCHEROO_ON) {
		printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
		nouveau_pmops_resume(&pdev->dev);
		drm_kms_helper_poll_enable(dev);
		dev->switch_power_state = DRM_SWITCH_POWER_ON;
	} else {
		printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
		drm_kms_helper_poll_disable(dev);
		nouveau_switcheroo_optimus_dsm();
		nouveau_pmops_suspend(&pdev->dev);
		dev->switch_power_state = DRM_SWITCH_POWER_OFF;
	}
}

static void
nouveau_switcheroo_reprobe(struct pci_dev *pdev)
{
	struct drm_device *dev = pci_get_drvdata(pdev);
	nouveau_fbcon_output_poll_changed(dev);
}

static bool
nouveau_switcheroo_can_switch(struct pci_dev *pdev)
{
	struct drm_device *dev = pci_get_drvdata(pdev);

	/*
	 * FIXME: open_count is protected by drm_global_mutex but that would lead to
	 * locking inversion with the driver load path. And the access here is
	 * completely racy anyway. So don't bother with locking for now.
	 */
	return dev->open_count == 0;
}

static const struct vga_switcheroo_client_ops
nouveau_switcheroo_ops = {
	.set_gpu_state = nouveau_switcheroo_set_state,
	.reprobe = nouveau_switcheroo_reprobe,
	.can_switch = nouveau_switcheroo_can_switch,
};

void
nouveau_vga_init(struct nouveau_drm *drm)
{
	struct drm_device *dev = drm->dev;
	bool runtime = false;

	/* only relevant for PCI devices */
	if (!dev->pdev)
		return;

	vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);

	if (nouveau_runtime_pm == 1)
		runtime = true;
	if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
		runtime = true;
	vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);

	if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
		vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
}

void
nouveau_vga_fini(struct nouveau_drm *drm)
{
	struct drm_device *dev = drm->dev;
	bool runtime = false;

	if (nouveau_runtime_pm == 1)
		runtime = true;
	if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
		runtime = true;

	vga_switcheroo_unregister_client(dev->pdev);
	if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
		vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
	vga_client_register(dev->pdev, NULL, NULL, NULL);
}


void
nouveau_vga_lastclose(struct drm_device *dev)
{
	vga_switcheroo_process_delayed_switch();
}