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_drv.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 nouveau_drm *drm = nouveau_drm(priv); 16 struct nvif_object *device = &drm->client.device.object; 17 18 if (drm->client.device.info.family == NV_DEVICE_INFO_V0_CURIE && 19 drm->client.device.info.chipset >= 0x4c) 20 nvif_wr32(device, 0x088060, state); 21 else 22 if (drm->client.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 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 pr_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 pr_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 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 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 87 nouveau_vga_init(struct nouveau_drm *drm) 88 { 89 struct drm_device *dev = drm->dev; 90 bool runtime = nouveau_pmops_runtime(); 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 /* don't register Thunderbolt eGPU with vga_switcheroo */ 99 if (pci_is_thunderbolt_attached(dev->pdev)) 100 return; 101 102 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 109 nouveau_vga_fini(struct nouveau_drm *drm) 110 { 111 struct drm_device *dev = drm->dev; 112 bool runtime = nouveau_pmops_runtime(); 113 114 /* only relevant for PCI devices */ 115 if (!dev->pdev) 116 return; 117 118 vga_client_register(dev->pdev, NULL, NULL, NULL); 119 120 if (pci_is_thunderbolt_attached(dev->pdev)) 121 return; 122 123 vga_switcheroo_unregister_client(dev->pdev); 124 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus()) 125 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev); 126 } 127 128 129 void 130 nouveau_vga_lastclose(struct drm_device *dev) 131 { 132 vga_switcheroo_process_delayed_switch(); 133 } 134