summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nouveau_vga.c
blob: 6f0ac64873dfb9983351159d141851fa15cd06ba (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
#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_device *device = nouveau_dev(priv);

	if (device->chipset >= 0x40)
		nv_wr32(device, 0x088054, state);
	else
		nv_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);
	pm_message_t pmm = { .event = PM_EVENT_SUSPEND };

	if (state == VGA_SWITCHEROO_ON) {
		printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
		nouveau_drm_resume(pdev);
		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_drm_suspend(pdev, pmm);
		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);
	bool can_switch;

	spin_lock(&dev->count_lock);
	can_switch = (dev->open_count == 0);
	spin_unlock(&dev->count_lock);
	return can_switch;
}

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;
	vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
	vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops);
}

void
nouveau_vga_fini(struct nouveau_drm *drm)
{
	struct drm_device *dev = drm->dev;
	vga_switcheroo_unregister_client(dev->pdev);
	vga_client_register(dev->pdev, NULL, NULL, NULL);
}


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