1 /* $NetBSD: nouveau_vga.c,v 1.1.1.2 2014/08/06 12:36:23 riastradh Exp $ */ 2 3 #include <sys/cdefs.h> 4 __KERNEL_RCSID(0, "$NetBSD: nouveau_vga.c,v 1.1.1.2 2014/08/06 12:36:23 riastradh Exp $"); 5 6 #include <linux/vgaarb.h> 7 #include <linux/vga_switcheroo.h> 8 9 #include <drm/drmP.h> 10 #include <drm/drm_crtc_helper.h> 11 12 #include "nouveau_drm.h" 13 #include "nouveau_acpi.h" 14 #include "nouveau_fbcon.h" 15 #include "nouveau_vga.h" 16 17 static unsigned int 18 nouveau_vga_set_decode(void *priv, bool state) 19 { 20 struct nouveau_device *device = nouveau_dev(priv); 21 22 if (device->card_type == NV_40 && device->chipset >= 0x4c) 23 nv_wr32(device, 0x088060, state); 24 else if (device->chipset >= 0x40) 25 nv_wr32(device, 0x088054, state); 26 else 27 nv_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 36 static void 37 nouveau_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 printk(KERN_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 printk(KERN_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 61 static void 62 nouveau_switcheroo_reprobe(struct pci_dev *pdev) 63 { 64 struct drm_device *dev = pci_get_drvdata(pdev); 65 nouveau_fbcon_output_poll_changed(dev); 66 } 67 68 static bool 69 nouveau_switcheroo_can_switch(struct pci_dev *pdev) 70 { 71 struct drm_device *dev = pci_get_drvdata(pdev); 72 bool can_switch; 73 74 spin_lock(&dev->count_lock); 75 can_switch = (dev->open_count == 0); 76 spin_unlock(&dev->count_lock); 77 return can_switch; 78 } 79 80 static const struct vga_switcheroo_client_ops 81 nouveau_switcheroo_ops = { 82 .set_gpu_state = nouveau_switcheroo_set_state, 83 .reprobe = nouveau_switcheroo_reprobe, 84 .can_switch = nouveau_switcheroo_can_switch, 85 }; 86 87 void 88 nouveau_vga_init(struct nouveau_drm *drm) 89 { 90 struct drm_device *dev = drm->dev; 91 bool runtime = false; 92 93 /* only relevant for PCI devices */ 94 if (!dev->pdev) 95 return; 96 97 vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode); 98 99 if (nouveau_runtime_pm == 1) 100 runtime = true; 101 if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm())) 102 runtime = true; 103 vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime); 104 105 if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus()) 106 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain); 107 } 108 109 void 110 nouveau_vga_fini(struct nouveau_drm *drm) 111 { 112 struct drm_device *dev = drm->dev; 113 vga_switcheroo_unregister_client(dev->pdev); 114 vga_client_register(dev->pdev, NULL, NULL, NULL); 115 } 116 117 118 void 119 nouveau_vga_lastclose(struct drm_device *dev) 120 { 121 vga_switcheroo_process_delayed_switch(); 122 } 123