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->chipset >= 0x40)
  18                 nv_wr32(device, 0x088054, state);
  19         else
  20                 nv_wr32(device, 0x001854, state);
  21
  22         if (state)
  23                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
  24                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
  25         else
  26                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
  27 }
  28
  29 static void
  30 nouveau_switcheroo_set_state(struct pci_dev *pdev,
  31                              enum vga_switcheroo_state state)
  32 {
  33         struct drm_device *dev = pci_get_drvdata(pdev);
  34
  35         if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
  36                 return;
  37
  38         if (state == VGA_SWITCHEROO_ON) {
  39                 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
  40                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  41                 nouveau_pmops_resume(&pdev->dev);
  42                 drm_kms_helper_poll_enable(dev);
  43                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
  44         } else {
  45                 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
  46                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  47                 drm_kms_helper_poll_disable(dev);
  48                 nouveau_switcheroo_optimus_dsm();
  49                 nouveau_pmops_suspend(&pdev->dev);
  50                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
  51         }
  52 }
  53
  54 static void
  55 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
  56 {
  57         struct drm_device *dev = pci_get_drvdata(pdev);
  58         nouveau_fbcon_output_poll_changed(dev);
  59 }
  60
  61 static bool
  62 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
  63 {
  64         struct drm_device *dev = pci_get_drvdata(pdev);
  65         bool can_switch;
  66
  67         spin_lock(&dev->count_lock);
  68         can_switch = (dev->open_count == 0);
  69         spin_unlock(&dev->count_lock);
  70         return can_switch;
  71 }
  72
  73 static const struct vga_switcheroo_client_ops
  74 nouveau_switcheroo_ops = {
  75         .set_gpu_state = nouveau_switcheroo_set_state,
  76         .reprobe = nouveau_switcheroo_reprobe,
  77         .can_switch = nouveau_switcheroo_can_switch,
  78 };
  79
  80 void
  81 nouveau_vga_init(struct nouveau_drm *drm)
  82 {
  83         struct drm_device *dev = drm->dev;
  84         bool runtime = false;
  85         vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
  86
  87         if (nouveau_runtime_pm == 1)
  88                 runtime = true;
  89         if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
  90                 runtime = true;
  91         vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
  92
  93         if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
  94                 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
  95 }
  96
  97 void
  98 nouveau_vga_fini(struct nouveau_drm *drm)
  99 {
 100         struct drm_device *dev = drm->dev;
 101         vga_switcheroo_unregister_client(dev->pdev);
 102         vga_client_register(dev->pdev, NULL, NULL, NULL);
 103 }
 104
 105
 106 void
 107 nouveau_vga_lastclose(struct drm_device *dev)
 108 {
 109         vga_switcheroo_process_delayed_switch();
 110 }