drm/switcheroo: track state of switch in drivers.

We need to track the state of the switch in drivers, so that after s/r
we don't resume the card we've explicitly switched off before. Also
don't allow a userspace open to occur if we've switched the gpu off.

Signed-off-by: Dave Airlie <airlied@redhat.com>

10 files changed, 40 insertions, 13 deletions

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index a39794bac04b..2ec7d48fc4a8 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -236,6 +236,8 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
                 return -EBUSY;  /* No exclusive opens */
         if (!drm_cpu_valid())
                 return -EINVAL;
+        if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
+                return -EINVAL;
 
         DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
 
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index ec1f650f6fab..0568dbdc10ef 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1151,12 +1151,16 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_
         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
         if (state == VGA_SWITCHEROO_ON) {
                 printk(KERN_INFO "i915: switched on\n");
+                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 /* i915 resume handler doesn't set to D0 */
                 pci_set_power_state(dev->pdev, PCI_D0);
                 i915_resume(dev);
+                dev->switch_power_state = DRM_SWITCH_POWER_ON;
         } else {
                 printk(KERN_ERR "i915: switched off\n");
+                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 i915_suspend(dev, pmm);
+                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
         }
 }
 
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 9eee6cf7901e..872493331988 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -271,6 +271,8 @@ static int i915_drm_freeze(struct drm_device *dev)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
 
+        drm_kms_helper_poll_disable(dev);
+
         pci_save_state(dev->pdev);
 
         /* If KMS is active, we do the leavevt stuff here */
@@ -307,7 +309,9 @@ int i915_suspend(struct drm_device *dev, pm_message_t state)
         if (state.event == PM_EVENT_PRETHAW)
                 return 0;
 
-        drm_kms_helper_poll_disable(dev);
+
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
 
         error = i915_drm_freeze(dev);
         if (error)
@@ -361,6 +365,9 @@ int i915_resume(struct drm_device *dev)
 {
         int ret;
 
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
+
         if (pci_enable_device(dev->pdev))
                 return -EIO;
 
@@ -569,6 +576,9 @@ static int i915_pm_suspend(struct device *dev)
                 return -ENODEV;
         }
 
+        if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
+
         error = i915_drm_freeze(drm_dev);
         if (error)
                 return error;
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.c b/drivers/gpu/drm/nouveau/nouveau_drv.c
index bb170570938b..13bb672a16f4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.c
@@ -171,6 +171,9 @@ nouveau_pci_suspend(struct pci_dev *pdev, pm_message_t pm_state)
         if (pm_state.event == PM_EVENT_PRETHAW)
                 return 0;
 
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
+
         NV_INFO(dev, "Disabling fbcon acceleration...\n");
         nouveau_fbcon_save_disable_accel(dev);
 
@@ -254,6 +257,9 @@ nouveau_pci_resume(struct pci_dev *pdev)
         struct drm_crtc *crtc;
         int ret, i;
 
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+                return 0;
+
         nouveau_fbcon_save_disable_accel(dev);
 
         NV_INFO(dev, "We're back, enabling device...\n");
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index e81575687354..e59f5bcab1ad 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -753,6 +753,8 @@ struct drm_nouveau_private {
 
         struct nouveau_fbdev *nfbdev;
         struct apertures_struct *apertures;
+
+        bool powered_down;
 };
 
 static inline struct drm_nouveau_private *
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index 1b87eee22fa9..a54fc431fe98 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -596,12 +596,16 @@ static void nouveau_switcheroo_set_state(struct pci_dev *pdev,
         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
         if (state == VGA_SWITCHEROO_ON) {
                 printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
+                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 nouveau_pci_resume(pdev);
                 drm_kms_helper_poll_enable(dev);
+                dev->switch_power_state = DRM_SWITCH_POWER_ON;
         } else {
                 printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
+                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 drm_kms_helper_poll_disable(dev);
                 nouveau_pci_suspend(pdev, pmm);
+                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
         }
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index d2697f8f2da8..140eaceab279 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1167,7 +1167,6 @@ struct radeon_device {
         uint8_t                 audio_status_bits;
         uint8_t                 audio_category_code;
 
-        bool powered_down;
         struct notifier_block acpi_nb;
         /* only one userspace can use Hyperz features at a time */
         struct drm_file *hyperz_filp;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 1a1017f0d9db..4ee0c53b28a7 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -642,20 +642,20 @@ void radeon_check_arguments(struct radeon_device *rdev)
 static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 {
         struct drm_device *dev = pci_get_drvdata(pdev);
-        struct radeon_device *rdev = dev->dev_private;
         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
         if (state == VGA_SWITCHEROO_ON) {
                 printk(KERN_INFO "radeon: switched on\n");
                 /* don't suspend or resume card normally */
-                rdev->powered_down = false;
+                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 radeon_resume_kms(dev);
+                dev->switch_power_state = DRM_SWITCH_POWER_ON;
                 drm_kms_helper_poll_enable(dev);
         } else {
                 printk(KERN_INFO "radeon: switched off\n");
                 drm_kms_helper_poll_disable(dev);
+                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                 radeon_suspend_kms(dev, pmm);
-                /* don't suspend or resume card normally */
-                rdev->powered_down = true;
+                dev->switch_power_state = DRM_SWITCH_POWER_OFF;
         }
 }
 
@@ -842,7 +842,7 @@ int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
         }
         rdev = dev->dev_private;
 
-        if (rdev->powered_down)
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                 return 0;
 
         /* turn off display hw */
@@ -900,7 +900,7 @@ int radeon_resume_kms(struct drm_device *dev)
         struct drm_connector *connector;
         struct radeon_device *rdev = dev->dev_private;
 
-        if (rdev->powered_down)
+        if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                 return 0;
 
         acquire_console_sem();
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 4bf423ca4c12..b2686334d46b 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -203,10 +203,6 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
  */
 int radeon_driver_firstopen_kms(struct drm_device *dev)
 {
-        struct radeon_device *rdev = dev->dev_private;
-
-        if (rdev->powered_down)
-                return -EINVAL;
         return 0;
 }
 
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 0f14f94ed8f4..a4694c610330 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1121,9 +1121,13 @@ struct drm_device {
         spinlock_t object_name_lock;
         struct idr object_name_idr;
         /*@} */
-
+        int switch_power_state;
 };
 
+#define DRM_SWITCH_POWER_ON 0
+#define DRM_SWITCH_POWER_OFF 1
+#define DRM_SWITCH_POWER_CHANGING 2
+
 static __inline__ int drm_core_check_feature(struct drm_device *dev,
                                              int feature)
 {