[Intel-gfx] [PATCH 1/4] drm/i915: Add distinct stubs for PM hibernation phases

[Chris Wilson]

Currently for handling the extra hibernation phases we just call the
equivalent suspend/resume phases. In the next couple of patches, I wish
to specialise the hibernation phases to reduce the amount of work
required for handling GEM objects.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Imre Deak <imre.deak at intel.com>
Cc: David Weinehall <david.weinehall at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 5ae79601335c..4c17e3e8d0ab 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1115,6 +1115,32 @@ static int i915_pm_resume(struct device *dev)
 	return i915_drm_resume(drm_dev);
 }
 
+/* thaw and thaw_early are called after creating the hibernation image,
+ * but before turning off.
+ */
+static int i915_pm_thaw_early(struct device *dev)
+{
+	return i915_pm_resume_early(dev);
+}
+
+static int i915_pm_thaw(struct device *dev)
+{
+	return i915_pm_resume(dev);
+}
+
+/* restore and restore_early are called when booting from the hibernation
+ * image.
+ */
+static int i915_pm_restore_early(struct device *dev)
+{
+	return i915_pm_resume_early(dev);
+}
+
+static int i915_pm_restore(struct device *dev)
+{
+	return i915_pm_resume(dev);
+}
+
 /*
  * Save all Gunit registers that may be lost after a D3 and a subsequent
  * S0i[R123] transition. The list of registers needing a save/restore is
@@ -1671,12 +1697,12 @@ static const struct dev_pm_ops i915_pm_ops = {
 	 */
 	.freeze = i915_pm_suspend,
 	.freeze_late = i915_pm_suspend_late,
-	.thaw_early = i915_pm_resume_early,
-	.thaw = i915_pm_resume,
+	.thaw_early = i915_pm_thaw_early,
+	.thaw = i915_pm_thaw,
 	.poweroff = i915_pm_suspend,
 	.poweroff_late = i915_pm_poweroff_late,
-	.restore_early = i915_pm_resume_early,
-	.restore = i915_pm_resume,
+	.restore_early = i915_pm_restore_early,
+	.restore = i915_pm_restore,
 
 	/* S0ix (via runtime suspend) event handlers */
 	.runtime_suspend = intel_runtime_suspend,
-- 
2.8.1