drm/i915: Completely disable fence pipelining.

I'm still seeing tiling corruption of PutImage and CopyArea (I think)
under mutter on pnv, so obviously the pipelining logic is deeply flawed.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index eeed2e99d247..8685b9279029 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2484,6 +2484,9 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
         struct drm_i915_fence_reg *reg;
         int ret;
 
+        /* XXX disable pipelining. There are bugs. Shocking. */
+        pipelined = NULL;
+
         /* Just update our place in the LRU if our fence is getting reused. */
         if (obj->fence_reg != I915_FENCE_REG_NONE) {
                 reg = &dev_priv->fence_regs[obj->fence_reg];
@@ -2556,9 +2559,8 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
                 if (old->tiling_mode)
                         i915_gem_release_mmap(old);
 
-                /* XXX The pipelined change over appears to be incoherent. */
                 ret = i915_gem_object_flush_fence(old,
-                                                  NULL, //pipelined,
+                                                  pipelined,
                                                   interruptible);
                 if (ret) {
                         drm_gem_object_unreference(&old->base);