Merge tag 'drm-intel-fixes-2014-10-02' of git://anongit.freedesktop.org/drm-intel into drm-fixes
final regression fix for 3.17.
* tag 'drm-intel-fixes-2014-10-02' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Flush the PTEs after updating them before suspend
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 1411613..e42925f 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1310,6 +1310,16 @@
POSTING_READ(RING_FAULT_REG(&dev_priv->ring[RCS]));
}
+static void i915_ggtt_flush(struct drm_i915_private *dev_priv)
+{
+ if (INTEL_INFO(dev_priv->dev)->gen < 6) {
+ intel_gtt_chipset_flush();
+ } else {
+ I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN);
+ POSTING_READ(GFX_FLSH_CNTL_GEN6);
+ }
+}
+
void i915_gem_suspend_gtt_mappings(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1326,6 +1336,8 @@
dev_priv->gtt.base.start,
dev_priv->gtt.base.total,
true);
+
+ i915_ggtt_flush(dev_priv);
}
void i915_gem_restore_gtt_mappings(struct drm_device *dev)
@@ -1378,7 +1390,7 @@
gen6_write_pdes(container_of(vm, struct i915_hw_ppgtt, base));
}
- i915_gem_chipset_flush(dev);
+ i915_ggtt_flush(dev_priv);
}
int i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj)
