drm/i915: suspend/resume GEM when KMS is active

In the KMS case, we need to suspend/resume GEM as well.  So on suspend, make
sure we idle GEM and stop any new rendering from coming in, and on resume,
re-init the framebuffer and clear the suspended flag.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 24 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a31cbdbc3c54..0692622ee2b3 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -27,6 +27,7 @@
  *
  */
 
+#include <linux/device.h>
 #include "drmP.h"
 #include "drm.h"
 #include "i915_drm.h"
@@ -66,6 +67,12 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state)
 
         i915_save_state(dev);
 
+        /* If KMS is active, we do the leavevt stuff here */
+        if (drm_core_check_feature(dev, DRIVER_MODESET) && i915_gem_idle(dev)) {
+                dev_err(&dev->pdev->dev, "GEM idle failed, aborting suspend\n");
+                return -EBUSY;
+        }
+
         intel_opregion_free(dev);
 
         if (state.event == PM_EVENT_SUSPEND) {
@@ -79,6 +86,9 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state)
 
 static int i915_resume(struct drm_device *dev)
 {
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        int ret = 0;
+
         pci_set_power_state(dev->pdev, PCI_D0);
         pci_restore_state(dev->pdev);
         if (pci_enable_device(dev->pdev))
@@ -89,7 +99,18 @@ static int i915_resume(struct drm_device *dev)
 
         intel_opregion_init(dev);
 
-        return 0;
+        /* KMS EnterVT equivalent */
+        if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+                mutex_lock(&dev->struct_mutex);
+                dev_priv->mm.suspended = 0;
+
+                ret = i915_gem_init_ringbuffer(dev);
+                if (ret != 0)
+                        ret = -1;
+                mutex_unlock(&dev->struct_mutex);
+        }
+
+        return ret;
 }
 
 static struct vm_operations_struct i915_gem_vm_ops = {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 135a08f615cd..17fa40858d26 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -618,6 +618,7 @@ int i915_gem_init_ringbuffer(struct drm_device *dev);
 void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
 int i915_gem_do_init(struct drm_device *dev, unsigned long start,
                      unsigned long end);
+int i915_gem_idle(struct drm_device *dev);
 int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
 int i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj,
                                       int write);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0f50574076b1..58c789da95a3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2973,7 +2973,7 @@ i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head)
         return 0;
 }
 
-static int
+int
 i915_gem_idle(struct drm_device *dev)
 {
         drm_i915_private_t *dev_priv = dev->dev_private;