drm: add support for passing state into the suspend hooks.

fix i915 driver to use state for hibernate save avoidance.

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

3 files changed, 11 insertions, 6 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 19d3be5c4b2d..a6789f25009b 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -568,7 +568,7 @@ struct drm_driver {
         void (*postclose) (struct drm_device *, struct drm_file *);
         void (*lastclose) (struct drm_device *);
         int (*unload) (struct drm_device *);
-        int (*suspend) (struct drm_device *);
+        int (*suspend) (struct drm_device *, pm_message_t state);
         int (*resume) (struct drm_device *);
         int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
         void (*dma_ready) (struct drm_device *);
diff --git a/drivers/char/drm/drm_sysfs.c b/drivers/char/drm/drm_sysfs.c
index fa36153619e8..05ed5043254f 100644
--- a/drivers/char/drm/drm_sysfs.c
+++ b/drivers/char/drm/drm_sysfs.c
@@ -36,7 +36,7 @@ static int drm_sysfs_suspend(struct device *dev, pm_message_t state)
         printk(KERN_ERR "%s\n", __FUNCTION__);
 
         if (drm_dev->driver->suspend)
-                return drm_dev->driver->suspend(drm_dev);
+                return drm_dev->driver->suspend(drm_dev, state);
 
         return 0;
 }
diff --git a/drivers/char/drm/i915_drv.c b/drivers/char/drm/i915_drv.c
index 35758a6c8b0d..4048f39b7eed 100644
--- a/drivers/char/drm/i915_drv.c
+++ b/drivers/char/drm/i915_drv.c
@@ -238,7 +238,7 @@ static void i915_restore_vga(struct drm_device *dev)
 
 }
 
-static int i915_suspend(struct drm_device *dev)
+static int i915_suspend(struct drm_device *dev, pm_message_t state)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
         int i;
@@ -249,6 +249,9 @@ static int i915_suspend(struct drm_device *dev)
                 return -ENODEV;
         }
 
+        if (state.event == PM_EVENT_PRETHAW)
+                return 0;
+
         pci_save_state(dev->pdev);
         pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
 
@@ -363,9 +366,11 @@ static int i915_suspend(struct drm_device *dev)
 
         i915_save_vga(dev);
 
-        /* Shut down the device */
-        pci_disable_device(dev->pdev);
-        pci_set_power_state(dev->pdev, PCI_D3hot);
+        if (state.event == PM_EVENT_SUSPEND) {
+                /* Shut down the device */
+                pci_disable_device(dev->pdev);
+                pci_set_power_state(dev->pdev, PCI_D3hot);
+        }
 
         return 0;
 }