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 13 nouveau_vga_set_decode(void *priv, bool state) 14 { 15 struct nvif_device *device = &nouveau_drm(priv)->device; 16 17 if (device->info.family == NV_DEVICE_INFO_V0_CURIE && 18 device->info.chipset >= 0x4c) 19 nvif_wr32(device, 0x088060, state); 20 else 21 if (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 33 static void 34 nouveau_switcheroo_set_state(struct pci_dev *pdev, 35 enum vga_switcheroo_state state) 36 { 37 struct drm_device *dev = pci_get_drvdata(pdev); 38 39 if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF) 40 return; 41 42 if (state == VGA_SWITCHEROO_ON) { 43 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n"); 44 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; 45 nouveau_pmops_resume(&pdev->dev); 46 drm_kms_helper_poll_enable(dev); 47 dev->switch_power_state = DRM_SWITCH_POWER_ON; 48 } else { 49 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n"); 50 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; 51 drm_kms_helper_poll_disable(dev); 52 nouveau_switcheroo_optimus_dsm(); 53 nouveau_pmops_suspend(&pdev->dev); 54 dev->switch_power_state = DRM_SWITCH_POWER_OFF; 55 } 56 } 57 58 static void 59 nouveau_switcheroo_reprobe(struct pci_dev *pdev) 60 { 61 struct drm_device *dev = pci_get_drvdata(pdev); 62 nouveau_fbcon_output_poll_changed(dev); 63 } 64 65 static bool 66 nouveau_switcheroo_can_switch(struct pci_dev *pdev) 67 { 68 struct drm_device *dev = pci_get_drvdata(pdev); 69 70 /* 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. 74 */ 75 return dev->open_count == 0; 76 } 77 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, 83 }; 84 85 void 86 nouveau_vga_init(struct nouveau_drm *drm) 87 { 88 struct drm_device *dev = drm->dev; 89 bool runtime = false; 90 91 /* only relevant for PCI devices */ 92 if (!dev->pdev) 93 return; 94 95 vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode); 96 97 if (nouveau_runtime_pm == 1) 98 runtime = true; 99 if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm())) 100 runtime = true; 101 vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime); 102 103 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus()) 104 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain); 105 } 106 107 void 108 nouveau_vga_fini(struct nouveau_drm *drm) 109 { 110 struct drm_device *dev = drm->dev; 111 bool runtime = false; 112 113 if (nouveau_runtime_pm == 1) 114 runtime = true; 115 if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm())) 116 runtime = true; 117 118 vga_switcheroo_unregister_client(dev->pdev); 119 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus()) 120 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev); 121 vga_client_register(dev->pdev, NULL, NULL, NULL); 122 } 123 124 125 void 126 nouveau_vga_lastclose(struct drm_device *dev) 127 { 128 vga_switcheroo_process_delayed_switch(); 129 } 130