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 (state == VGA_SWITCHEROO_ON) {
  36                 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
  37                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  38                 nouveau_pmops_resume(&pdev->dev);
  39                 drm_kms_helper_poll_enable(dev);
  40                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
  41         } else {
  42                 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
  43                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  44                 drm_kms_helper_poll_disable(dev);
  45                 nouveau_switcheroo_optimus_dsm();
  46                 nouveau_pmops_suspend(&pdev->dev);
  47                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
  48         }
  49 }
  50
  51 static void
  52 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
  53 {
  54         struct drm_device *dev = pci_get_drvdata(pdev);
  55         nouveau_fbcon_output_poll_changed(dev);
  56 }
  57
  58 static bool
  59 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
  60 {
  61         struct drm_device *dev = pci_get_drvdata(pdev);
  62         bool can_switch;
  63
  64         spin_lock(&dev->count_lock);
  65         can_switch = (dev->open_count == 0);
  66         spin_unlock(&dev->count_lock);
  67         return can_switch;
  68 }
  69
  70 static const struct vga_switcheroo_client_ops
  71 nouveau_switcheroo_ops = {
  72         .set_gpu_state = nouveau_switcheroo_set_state,
  73         .reprobe = nouveau_switcheroo_reprobe,
  74         .can_switch = nouveau_switcheroo_can_switch,
  75 };
  76
  77 void
  78 nouveau_vga_init(struct nouveau_drm *drm)
  79 {
  80         struct drm_device *dev = drm->dev;
  81         vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
  82         vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, false);
  83 }
  84
  85 void
  86 nouveau_vga_fini(struct nouveau_drm *drm)
  87 {
  88         struct drm_device *dev = drm->dev;
  89         vga_switcheroo_unregister_client(dev->pdev);
  90         vga_client_register(dev->pdev, NULL, NULL, NULL);
  91 }
  92
  93
  94 void
  95 nouveau_vga_lastclose(struct drm_device *dev)
  96 {
  97         vga_switcheroo_process_delayed_switch();
  98 }