From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 8 Dec 2010 14:26:19 +0000 (+0000)
Subject: drm/i915: Restore GTT mapping first upon resume
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d1c3b177b9940541e89015a726ac279caf1a21f3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/i915: Restore GTT mapping first upon resume

As suggested by Daniel Vetter, this is a safeguard should any of the
registers cause reference to PTE entries.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ad28b21f4d03..2be344a8e93b 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -304,13 +304,18 @@ static int i915_drm_thaw(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int error = 0;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+		mutex_lock(&dev->struct_mutex);
+		i915_gem_restore_gtt_mappings(dev);
+		mutex_unlock(&dev->struct_mutex);
+	}
+
 	i915_restore_state(dev);
 	intel_opregion_setup(dev);
 
 	/* KMS EnterVT equivalent */
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 		mutex_lock(&dev->struct_mutex);
-		i915_gem_restore_gtt_mappings(dev);
 		dev_priv->mm.suspended = 0;
 
 		error = i915_gem_init_ringbuffer(dev);