LXR linux/drivers/gpu/drm/nouveau/nouveau

   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_drv.h"
   8#include "nouveau_acpi.h"
   9#include "nouveau_fbcon.h"
  10#include "nouveau_vga.h"
  11
  12static unsigned int
  13nouveau_vga_set_decode(void *priv, bool state)
  14{
  15        struct nouveau_drm *drm = nouveau_drm(priv);
  16        struct nvif_object *device = &drm->device.object;
  17
  18        if (drm->device.info.family == NV_DEVICE_INFO_V0_CURIE &&
  19            drm->device.info.chipset >= 0x4c)
  20                nvif_wr32(device, 0x088060, state);
  21        else
  22        if (drm->device.info.chipset >= 0x40)
  23                nvif_wr32(device, 0x088054, state);
  24        else
  25                nvif_wr32(device, 0x001854, state);
  26
  27        if (state)
  28                return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
  29                       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
  30        else
  31                return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
  32}
  33
  34static void
  35nouveau_switcheroo_set_state(struct pci_dev *pdev,
  36                             enum vga_switcheroo_state state)
  37{
  38        struct drm_device *dev = pci_get_drvdata(pdev);
  39
  40        if ((nouveau_is_optimus() || nouveau_is_v1_dsm()) && state == VGA_SWITCHEROO_OFF)
  41                return;
  42
  43        if (state == VGA_SWITCHEROO_ON) {
  44                printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
  45                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  46                nouveau_pmops_resume(&pdev->dev);
  47                drm_kms_helper_poll_enable(dev);
  48                dev->switch_power_state = DRM_SWITCH_POWER_ON;
  49        } else {
  50                printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
  51                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
  52                drm_kms_helper_poll_disable(dev);
  53                nouveau_switcheroo_optimus_dsm();
  54                nouveau_pmops_suspend(&pdev->dev);
  55                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
  56        }
  57}
  58
  59static void
  60nouveau_switcheroo_reprobe(struct pci_dev *pdev)
  61{
  62        struct drm_device *dev = pci_get_drvdata(pdev);
  63        nouveau_fbcon_output_poll_changed(dev);
  64}
  65
  66static bool
  67nouveau_switcheroo_can_switch(struct pci_dev *pdev)
  68{
  69        struct drm_device *dev = pci_get_drvdata(pdev);
  70
  71        /*
  72         * FIXME: open_count is protected by drm_global_mutex but that would lead to
  73         * locking inversion with the driver load path. And the access here is
  74         * completely racy anyway. So don't bother with locking for now.
  75         */
  76        return dev->open_count == 0;
  77}
  78
  79static const struct vga_switcheroo_client_ops
  80nouveau_switcheroo_ops = {
  81        .set_gpu_state = nouveau_switcheroo_set_state,
  82        .reprobe = nouveau_switcheroo_reprobe,
  83        .can_switch = nouveau_switcheroo_can_switch,
  84};
  85
  86void
  87nouveau_vga_init(struct nouveau_drm *drm)
  88{
  89        struct drm_device *dev = drm->dev;
  90        bool runtime = false;
  91
  92        /* only relevant for PCI devices */
  93        if (!dev->pdev)
  94                return;
  95
  96        vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
  97
  98        if (nouveau_runtime_pm == 1)
  99                runtime = true;
 100        if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
 101                runtime = true;
 102        vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops, runtime);
 103
 104        if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
 105                vga_switcheroo_init_domain_pm_ops(drm->dev->dev, &drm->vga_pm_domain);
 106}
 107
 108void
 109nouveau_vga_fini(struct nouveau_drm *drm)
 110{
 111        struct drm_device *dev = drm->dev;
 112        bool runtime = false;
 113
 114        if (nouveau_runtime_pm == 1)
 115                runtime = true;
 116        if ((nouveau_runtime_pm == -1) && (nouveau_is_optimus() || nouveau_is_v1_dsm()))
 117                runtime = true;
 118
 119        vga_switcheroo_unregister_client(dev->pdev);
 120        if (runtime && nouveau_is_v1_dsm() && !nouveau_is_optimus())
 121                vga_switcheroo_fini_domain_pm_ops(drm->dev->dev);
 122        vga_client_register(dev->pdev, NULL, NULL, NULL);
 123}
 124
 125
 126void
 127nouveau_vga_lastclose(struct drm_device *dev)
 128{
 129        vga_switcheroo_process_delayed_switch();
 130}
 131