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 nouveau_device *device = nouveau_dev(priv); 16 17 if (device->card_type == NV_40 && device->chipset >= 0x4c) 18 nv_wr32(device, 0x088060, state); 19 else if (device->chipset >= 0x40) 20 nv_wr32(device, 0x088054, state); 21 else 22 nv_wr32(device, 0x001854, state); 23 24 if (state) 25 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM | 26 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; 27 else 28 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; 29 } 30 31 static void 32 nouveau_switcheroo_set_state(struct pci_dev *pdev, 33 enum vga_switcheroo_state state) 34 { 35 struct drm_device *dev = pci_get_drvdata(pdev); 36 37 if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF) 38 return; 39 40 if (state == VGA_SWITCHEROO_ON) { 41 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n"); 42 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; 43 nouveau_pmops_resume(&pdev->dev); 44 drm_kms_helper_poll_enable(dev); 45 dev->switch_power_state = DRM_SWITCH_POWER_ON; 46 } else { 47 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n"); 48 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; 49 drm_kms_helper_poll_disable(dev); 50 nouveau_switcheroo_optimus_dsm(); 51 nouveau_pmops_suspend(&pdev->dev); 52 dev->switch_power_state = DRM_SWITCH_POWER_OFF; 53 } 54 } 55 56 static void 57 nouveau_switcheroo_reprobe(struct pci_dev *pdev) 58 { 59 struct drm_device *dev = pci_get_drvdata(pdev); 60 nouveau_fbcon_output_poll_changed(dev); 61 } 62 63 static bool 64 nouveau_switcheroo_can_switch(struct pci_dev *pdev) 65 { 66 struct drm_device *dev = pci_get_drvdata(pdev); 67 68 /* 69 * FIXME: open_count is protected by drm_global_mutex but that would lead to 70 * locking inversion with the driver load path. And the access here is 71 * completely racy anyway. So don't bother with locking for now. 72 */ 73 return dev->open_count == 0; 74 } 75 76 static const struct vga_switcheroo_client_ops 77 nouveau_switcheroo_ops = { 78 .set_gpu_state = nouveau_switcheroo_set_state, 79 .reprobe = nouveau_switcheroo_reprobe, 80 .can_switch = nouveau_switcheroo_can_switch, 81 }; 82 83 void 84 nouveau_vga_init(struct nouveau_drm *drm) 85 { 86 struct drm_device *dev = drm->dev; 87 bool runtime = false; 88 89 /* only relevant for PCI devices */ 90 if (!dev->pdev) 91 return; 92 93 vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode); 94 95 if (nouveau_runtime_pm == 1) 96 runtime = true; 97 if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm())) 98 runtime = true; 99 vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime); 100 101 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus()) 102 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain); 103 } 104 105 void 106 nouveau_vga_fini(struct nouveau_drm *drm) 107 { 108 struct drm_device *dev = drm->dev; 109 vga_switcheroo_unregister_client(dev->pdev); 110 vga_client_register(dev->pdev, NULL, NULL, NULL); 111 } 112 113 114 void 115 nouveau_vga_lastclose(struct drm_device *dev) 116 { 117 vga_switcheroo_process_delayed_switch(); 118 } 119