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
12 static unsigned int
nouveau_vga_set_decode(void * priv,bool state)13 nouveau_vga_set_decode(void *priv, bool state)
14 {
15 struct nouveau_drm *drm = nouveau_drm(priv);
16 struct nvif_object *device = &drm->device.object;
17
18 if (drm->device.info.family == NV_DEVICE_INFO_V0_CURIE &&
19 drm->device.info.chipset >= 0x4c)
20 nvif_wr32(device, 0x088060, state);
21 else
22 if (drm->device.info.chipset >= 0x40)
23 nvif_wr32(device, 0x088054, state);
24 else
25 nvif_wr32(device, 0x001854, state);
26
27 if (state)
28 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
29 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
30 else
31 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
32 }
33
34 static void
nouveau_switcheroo_set_state(struct pci_dev * pdev,enum vga_switcheroo_state state)35 nouveau_switcheroo_set_state(struct pci_dev *pdev,
36 enum vga_switcheroo_state state)
37 {
38 struct drm_device *dev = pci_get_drvdata(pdev);
39
40 if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
41 return;
42
43 if (state == VGA_SWITCHEROO_ON) {
44 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
45 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
46 nouveau_pmops_resume(&pdev->dev);
47 drm_kms_helper_poll_enable(dev);
48 dev->switch_power_state = DRM_SWITCH_POWER_ON;
49 } else {
50 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
51 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
52 drm_kms_helper_poll_disable(dev);
53 nouveau_switcheroo_optimus_dsm();
54 nouveau_pmops_suspend(&pdev->dev);
55 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
56 }
57 }
58
59 static void
nouveau_switcheroo_reprobe(struct pci_dev * pdev)60 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
61 {
62 struct drm_device *dev = pci_get_drvdata(pdev);
63 nouveau_fbcon_output_poll_changed(dev);
64 }
65
66 static bool
nouveau_switcheroo_can_switch(struct pci_dev * pdev)67 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
68 {
69 struct drm_device *dev = pci_get_drvdata(pdev);
70
71 /*
72 * FIXME: open_count is protected by drm_global_mutex but that would lead to
73 * locking inversion with the driver load path. And the access here is
74 * completely racy anyway. So don't bother with locking for now.
75 */
76 return dev->open_count == 0;
77 }
78
79 static const struct vga_switcheroo_client_ops
80 nouveau_switcheroo_ops = {
81 .set_gpu_state = nouveau_switcheroo_set_state,
82 .reprobe = nouveau_switcheroo_reprobe,
83 .can_switch = nouveau_switcheroo_can_switch,
84 };
85
86 void
nouveau_vga_init(struct nouveau_drm * drm)87 nouveau_vga_init(struct nouveau_drm *drm)
88 {
89 struct drm_device *dev = drm->dev;
90 bool runtime = false;
91
92 /* only relevant for PCI devices */
93 if (!dev->pdev)
94 return;
95
96 vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
97
98 if (nouveau_runtime_pm == 1)
99 runtime = true;
100 if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
101 runtime = true;
102 vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
103
104 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
105 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
106 }
107
108 void
nouveau_vga_fini(struct nouveau_drm * drm)109 nouveau_vga_fini(struct nouveau_drm *drm)
110 {
111 struct drm_device *dev = drm->dev;
112 bool runtime = false;
113
114 if (nouveau_runtime_pm == 1)
115 runtime = true;
116 if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
117 runtime = true;
118
119 vga_switcheroo_unregister_client(dev->pdev);
120 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
121 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
122 vga_client_register(dev->pdev, NULL, NULL, NULL);
123 }
124
125
126 void
nouveau_vga_lastclose(struct drm_device * dev)127 nouveau_vga_lastclose(struct drm_device *dev)
128 {
129 vga_switcheroo_process_delayed_switch();
130 }
131