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         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
  35
  36         if (state == VGA_SWITCHEROO_ON) {
  37                 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
  38                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  39                 nouveau_drm_resume(pdev);
  40                 drm_kms_helper_poll_enable(dev);
  41                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
  42         } else {
  43                 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
  44                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  45                 drm_kms_helper_poll_disable(dev);
  46                 nouveau_switcheroo_optimus_dsm();
  47                 nouveau_drm_suspend(pdev, pmm);
  48                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
  49         }
  50 }
  51
  52 static void
  53 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
  54 {
  55         struct drm_device *dev = pci_get_drvdata(pdev);
  56         nouveau_fbcon_output_poll_changed(dev);
  57 }
  58
  59 static bool
  60 nouveau_switcheroo_can_switch(struct pci_dev *pdev)
  61 {
  62         struct drm_device *dev = pci_get_drvdata(pdev);
  63         bool can_switch;
  64
  65         spin_lock(&dev->count_lock);
  66         can_switch = (dev->open_count == 0);
  67         spin_unlock(&dev->count_lock);
  68         return can_switch;
  69 }
  70
  71 static const struct vga_switcheroo_client_ops
  72 nouveau_switcheroo_ops = {
  73         .set_gpu_state = nouveau_switcheroo_set_state,
  74         .reprobe = nouveau_switcheroo_reprobe,
  75         .can_switch = nouveau_switcheroo_can_switch,
  76 };
  77
  78 void
  79 nouveau_vga_init(struct nouveau_drm *drm)
  80 {
  81         struct drm_device *dev = drm->dev;
  82         vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
  83         vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops);
  84 }
  85
  86 void
  87 nouveau_vga_fini(struct nouveau_drm *drm)
  88 {
  89         struct drm_device *dev = drm->dev;
  90         vga_switcheroo_unregister_client(dev->pdev);
  91         vga_client_register(dev->pdev, NULL, NULL, NULL);
  92 }
  93
  94
  95 void
  96 nouveau_vga_lastclose(struct drm_device *dev)
  97 {
  98         vga_switcheroo_process_delayed_switch();
  99 }