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1// SPDX-License-Identifier: MIT
2#include <linux/vgaarb.h>
3#include <linux/vga_switcheroo.h>
4
5#include <drm/drm_client_event.h>
6
7#include "nouveau_drv.h"
8#include "nouveau_acpi.h"
9#include "nouveau_vga.h"
10
11static unsigned int
12nouveau_vga_set_decode(struct pci_dev *pdev, bool state)
13{
14 struct nouveau_drm *drm = pci_get_drvdata(pdev);
15 struct nvif_object *device = &drm->client.device.object;
16
17 if (drm->client.device.info.family == NV_DEVICE_INFO_V0_CURIE &&
18 drm->client.device.info.chipset >= 0x4c)
19 nvif_wr32(device, 0x088060, state);
20 else
21 if (drm->client.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 nouveau_drm *drm = pci_get_drvdata(pdev);
38 struct drm_device *dev = drm->dev;
39
40 if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
41 return;
42
43 if (state == VGA_SWITCHEROO_ON) {
44 pr_err("VGA switcheroo: switched nouveau on\n");
45 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
46 nouveau_pmops_resume(&pdev->dev);
47 dev->switch_power_state = DRM_SWITCH_POWER_ON;
48 } else {
49 pr_err("VGA switcheroo: switched nouveau off\n");
50 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
51 nouveau_switcheroo_optimus_dsm();
52 nouveau_pmops_suspend(&pdev->dev);
53 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
54 }
55}
56
57static void
58nouveau_switcheroo_reprobe(struct pci_dev *pdev)
59{
60 struct nouveau_drm *drm = pci_get_drvdata(pdev);
61 struct drm_device *dev = drm->dev;
62
63 drm_client_dev_hotplug(dev);
64}
65
66static bool
67nouveau_switcheroo_can_switch(struct pci_dev *pdev)
68{
69 struct nouveau_drm *drm = 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 atomic_read(&drm->dev->open_count) == 0;
77}
78
79static const struct vga_switcheroo_client_ops
80nouveau_switcheroo_ops = {
81 .set_gpu_state = nouveau_switcheroo_set_state,
82 .reprobe = nouveau_switcheroo_reprobe,
83 .can_switch = nouveau_switcheroo_can_switch,
84};
85
86void
87nouveau_vga_init(struct nouveau_drm *drm)
88{
89 struct drm_device *dev = drm->dev;
90 bool runtime = nouveau_pmops_runtime();
91 struct pci_dev *pdev;
92
93 /* only relevant for PCI devices */
94 if (!dev_is_pci(dev->dev))
95 return;
96 pdev = to_pci_dev(dev->dev);
97
98 vga_client_register(pdev, nouveau_vga_set_decode);
99
100 /* don't register Thunderbolt eGPU with vga_switcheroo */
101 if (pci_is_thunderbolt_attached(pdev))
102 return;
103
104 vga_switcheroo_register_client(pdev, &nouveau_switcheroo_ops, runtime);
105
106 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
107 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
108}
109
110void
111nouveau_vga_fini(struct nouveau_drm *drm)
112{
113 struct drm_device *dev = drm->dev;
114 bool runtime = nouveau_pmops_runtime();
115 struct pci_dev *pdev;
116
117 /* only relevant for PCI devices */
118 if (!dev_is_pci(dev->dev))
119 return;
120 pdev = to_pci_dev(dev->dev);
121
122 vga_client_unregister(pdev);
123
124 if (pci_is_thunderbolt_attached(pdev))
125 return;
126
127 vga_switcheroo_unregister_client(pdev);
128 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
129 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
130}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/vgaarb.h>
3#include <linux/vga_switcheroo.h>
4
5#include <drm/drmP.h>
6#include <drm/drm_crtc_helper.h>
7#include <drm/drm_fb_helper.h>
8
9#include "nouveau_drv.h"
10#include "nouveau_acpi.h"
11#include "nouveau_fbcon.h"
12#include "nouveau_vga.h"
13
14static unsigned int
15nouveau_vga_set_decode(void *priv, bool state)
16{
17 struct nouveau_drm *drm = nouveau_drm(priv);
18 struct nvif_object *device = &drm->client.device.object;
19
20 if (drm->client.device.info.family == NV_DEVICE_INFO_V0_CURIE &&
21 drm->client.device.info.chipset >= 0x4c)
22 nvif_wr32(device, 0x088060, state);
23 else
24 if (drm->client.device.info.chipset >= 0x40)
25 nvif_wr32(device, 0x088054, state);
26 else
27 nvif_wr32(device, 0x001854, state);
28
29 if (state)
30 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
31 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
32 else
33 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
34}
35
36static void
37nouveau_switcheroo_set_state(struct pci_dev *pdev,
38 enum vga_switcheroo_state state)
39{
40 struct drm_device *dev = pci_get_drvdata(pdev);
41
42 if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
43 return;
44
45 if (state == VGA_SWITCHEROO_ON) {
46 pr_err("VGA switcheroo: switched nouveau on\n");
47 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
48 nouveau_pmops_resume(&pdev->dev);
49 drm_kms_helper_poll_enable(dev);
50 dev->switch_power_state = DRM_SWITCH_POWER_ON;
51 } else {
52 pr_err("VGA switcheroo: switched nouveau off\n");
53 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
54 drm_kms_helper_poll_disable(dev);
55 nouveau_switcheroo_optimus_dsm();
56 nouveau_pmops_suspend(&pdev->dev);
57 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
58 }
59}
60
61static void
62nouveau_switcheroo_reprobe(struct pci_dev *pdev)
63{
64 struct drm_device *dev = pci_get_drvdata(pdev);
65 drm_fb_helper_output_poll_changed(dev);
66}
67
68static bool
69nouveau_switcheroo_can_switch(struct pci_dev *pdev)
70{
71 struct drm_device *dev = pci_get_drvdata(pdev);
72
73 /*
74 * FIXME: open_count is protected by drm_global_mutex but that would lead to
75 * locking inversion with the driver load path. And the access here is
76 * completely racy anyway. So don't bother with locking for now.
77 */
78 return dev->open_count == 0;
79}
80
81static const struct vga_switcheroo_client_ops
82nouveau_switcheroo_ops = {
83 .set_gpu_state = nouveau_switcheroo_set_state,
84 .reprobe = nouveau_switcheroo_reprobe,
85 .can_switch = nouveau_switcheroo_can_switch,
86};
87
88void
89nouveau_vga_init(struct nouveau_drm *drm)
90{
91 struct drm_device *dev = drm->dev;
92 bool runtime = nouveau_pmops_runtime();
93
94 /* only relevant for PCI devices */
95 if (!dev->pdev)
96 return;
97
98 vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
99
100 /* don't register Thunderbolt eGPU with vga_switcheroo */
101 if (pci_is_thunderbolt_attached(dev->pdev))
102 return;
103
104 vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
105
106 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
107 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
108}
109
110void
111nouveau_vga_fini(struct nouveau_drm *drm)
112{
113 struct drm_device *dev = drm->dev;
114 bool runtime = nouveau_pmops_runtime();
115
116 /* only relevant for PCI devices */
117 if (!dev->pdev)
118 return;
119
120 vga_client_register(dev->pdev, NULL, NULL, NULL);
121
122 if (pci_is_thunderbolt_attached(dev->pdev))
123 return;
124
125 vga_switcheroo_unregister_client(dev->pdev);
126 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
127 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
128}
129
130
131void
132nouveau_vga_lastclose(struct drm_device *dev)
133{
134 vga_switcheroo_process_delayed_switch();
135}