drivers/gpu/drm/nouveau/nouveau_vga.c

   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         bool can_switch;
  68
  69         spin_lock(&dev->count_lock);
  70         can_switch = (dev->open_count == 0);
  71         spin_unlock(&dev->count_lock);
  72         return can_switch;
  73 }
  74
  75 static const struct vga_switcheroo_client_ops
  76 nouveau_switcheroo_ops = {
  77         .set_gpu_state = nouveau_switcheroo_set_state,
  78         .reprobe = nouveau_switcheroo_reprobe,
  79         .can_switch = nouveau_switcheroo_can_switch,
  80 };
  81
  82 void
  83 nouveau_vga_init(struct nouveau_drm *drm)
  84 {
  85         struct drm_device *dev = drm->dev;
  86         bool runtime = false;
  87
  88         /* only relevant for PCI devices */
  89         if (!dev->pdev)
  90                 return;
  91
  92         vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
  93
  94         if (nouveau_runtime_pm == 1)
  95                 runtime = true;
  96         if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
  97                 runtime = true;
  98         vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
  99
 100         if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
 101                 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
 102 }
 103
 104 void
 105 nouveau_vga_fini(struct nouveau_drm *drm)
 106 {
 107         struct drm_device *dev = drm->dev;
 108         vga_switcheroo_unregister_client(dev->pdev);
 109         vga_client_register(dev->pdev, NULL, NULL, NULL);
 110 }
 111
 112
 113 void
 114 nouveau_vga_lastclose(struct drm_device *dev)
 115 {
 116         vga_switcheroo_process_delayed_switch();
 117 }