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
  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 }