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 nvif_device *device = &nouveau_drm(priv)->device;
  16
  17         if (device->info.family == NV_DEVICE_INFO_V0_CURIE &&
  18             device->info.chipset >= 0x4c)
  19                 nvif_wr32(device, 0x088060, state);
  20         else
  21         if (device->info.chipset >= 0x40)
  22                 nvif_wr32(device, 0x088054, state);
  23         else
  24                 nvif_wr32(device, 0x001854, state);
  25
  26         if (state)
  27                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
  28                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
  29         else
  30                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
  31 }
  32
  33 static void
  34 nouveau_switcheroo_set_state(struct pci_dev *pdev,
  35                              enum vga_switcheroo_state state)
  36 {
  37         struct drm_device *dev = pci_get_drvdata(pdev);
  38
  39         if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
  40                 return;
  41
  42         if (state == VGA_SWITCHEROO_ON) {
  43                 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
  44                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  45                 nouveau_pmops_resume(&pdev->dev);
  46                 drm_kms_helper_poll_enable(dev);
  47                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
  48         } else {
  49                 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
  50                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  51                 drm_kms_helper_poll_disable(dev);
  52                 nouveau_switcheroo_optimus_dsm();
  53                 nouveau_pmops_suspend(&pdev->dev);
  54                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
  55         }
  56 }
  57
  58 static void
  59 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
  60 {
  61         struct drm_device *dev = pci_get_drvdata(pdev);
  62         nouveau_fbcon_output_poll_changed(dev);
  63 }
  64
  65 static bool
  66 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
  67 {
  68         struct drm_device *dev = pci_get_drvdata(pdev);
  69
  70         /*
  71          * FIXME: open_count is protected by drm_global_mutex but that would lead to
  72          * locking inversion with the driver load path. And the access here is
  73          * completely racy anyway. So don't bother with locking for now.
  74          */
  75         return dev->open_count == 0;
  76 }
  77
  78 static const struct vga_switcheroo_client_ops
  79 nouveau_switcheroo_ops = {
  80         .set_gpu_state = nouveau_switcheroo_set_state,
  81         .reprobe = nouveau_switcheroo_reprobe,
  82         .can_switch = nouveau_switcheroo_can_switch,
  83 };
  84
  85 void
  86 nouveau_vga_init(struct nouveau_drm *drm)
  87 {
  88         struct drm_device *dev = drm->dev;
  89         bool runtime = false;
  90
  91         /* only relevant for PCI devices */
  92         if (!dev->pdev)
  93                 return;
  94
  95         vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
  96
  97         if (nouveau_runtime_pm == 1)
  98                 runtime = true;
  99         if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
 100                 runtime = true;
 101         vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
 102
 103         if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
 104                 vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
 105 }
 106
 107 void
 108 nouveau_vga_fini(struct nouveau_drm *drm)
 109 {
 110         struct drm_device *dev = drm->dev;
 111         bool runtime = false;
 112
 113         if (nouveau_runtime_pm == 1)
 114                 runtime = true;
 115         if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
 116                 runtime = true;
 117
 118         vga_switcheroo_unregister_client(dev->pdev);
 119         if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
 120                 vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
 121         vga_client_register(dev->pdev, NULL, NULL, NULL);
 122 }
 123
 124
 125 void
 126 nouveau_vga_lastclose(struct drm_device *dev)
 127 {
 128         vga_switcheroo_process_delayed_switch();
 129 }