1 // SPDX-License-Identifier: MIT
2 #include <linux/vgaarb.h>
3 #include <linux/vga_switcheroo.h>
5 #include <drm/drm_crtc_helper.h>
6 #include <drm/drm_fb_helper.h>
8 #include "nouveau_drv.h"
9 #include "nouveau_acpi.h"
10 #include "nouveau_fbcon.h"
11 #include "nouveau_vga.h"
14 nouveau_vga_set_decode(void *priv, bool state)
16 struct nouveau_drm *drm = nouveau_drm(priv);
17 struct nvif_object *device = &drm->client.device.object;
19 if (drm->client.device.info.family == NV_DEVICE_INFO_V0_CURIE &&
20 drm->client.device.info.chipset >= 0x4c)
21 nvif_wr32(device, 0x088060, state);
23 if (drm->client.device.info.chipset >= 0x40)
24 nvif_wr32(device, 0x088054, state);
26 nvif_wr32(device, 0x001854, state);
29 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
30 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
32 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
36 nouveau_switcheroo_set_state(struct pci_dev *pdev,
37 enum vga_switcheroo_state state)
39 struct drm_device *dev = pci_get_drvdata(pdev);
41 if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
44 if (state == VGA_SWITCHEROO_ON) {
45 pr_err("VGA switcheroo: switched nouveau on\n");
46 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
47 nouveau_pmops_resume(&pdev->dev);
48 dev->switch_power_state = DRM_SWITCH_POWER_ON;
50 pr_err("VGA switcheroo: switched nouveau off\n");
51 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
52 nouveau_switcheroo_optimus_dsm();
53 nouveau_pmops_suspend(&pdev->dev);
54 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
59 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
61 struct drm_device *dev = pci_get_drvdata(pdev);
62 drm_fb_helper_output_poll_changed(dev);
66 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
68 struct drm_device *dev = pci_get_drvdata(pdev);
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.
75 return atomic_read(&dev->open_count) == 0;
78 static const struct vga_switcheroo_client_ops
79 nouveau_switcheroo_ops = {
80 .set_gpu_state = nouveau_switcheroo_set_state,
81 .reprobe = nouveau_switcheroo_reprobe,
82 .can_switch = nouveau_switcheroo_can_switch,
86 nouveau_vga_init(struct nouveau_drm *drm)
88 struct drm_device *dev = drm->dev;
89 bool runtime = nouveau_pmops_runtime();
92 /* only relevant for PCI devices */
93 if (!dev_is_pci(dev->dev))
95 pdev = to_pci_dev(dev->dev);
97 vga_client_register(pdev, dev, NULL, nouveau_vga_set_decode);
99 /* don't register Thunderbolt eGPU with vga_switcheroo */
100 if (pci_is_thunderbolt_attached(pdev))
103 vga_switcheroo_register_client(pdev, &nouveau_switcheroo_ops, runtime);
105 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
106 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
110 nouveau_vga_fini(struct nouveau_drm *drm)
112 struct drm_device *dev = drm->dev;
113 bool runtime = nouveau_pmops_runtime();
114 struct pci_dev *pdev;
116 /* only relevant for PCI devices */
117 if (!dev_is_pci(dev->dev))
119 pdev = to_pci_dev(dev->dev);
121 vga_client_register(pdev, NULL, NULL, NULL);
123 if (pci_is_thunderbolt_attached(pdev))
126 vga_switcheroo_unregister_client(pdev);
127 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
128 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
133 nouveau_vga_lastclose(struct drm_device *dev)
135 vga_switcheroo_process_delayed_switch();