[PATCH] Revert "drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits"

[Steve Conklin]

This reverts commit 30ae292ec68402c773ddc8c80f83f7cd84289a39.

This has been shown to cause GPU hangs
---
 drivers/gpu/drm/i915/intel_ringbuffer.c |    5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index c3654ff..fbaa785 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -422,11 +422,6 @@ static int init_render_ring(struct intel_ring_buffer *ring)
 	if (INTEL_INFO(dev)->gen >= 6)
 		I915_WRITE(MI_MODE, GFX_MODE_ENABLE(ASYNC_FLIP_PERF_DISABLE));
 
-	/* Required for the hardware to program scanline values for waiting */
-	if (INTEL_INFO(dev)->gen == 6)
-		I915_WRITE(GFX_MODE,
-			   GFX_MODE_ENABLE(GFX_TLB_INVALIDATE_ALWAYS));
-
 	if (IS_GEN7(dev))
 		I915_WRITE(GFX_MODE_GEN7,
 			   GFX_MODE_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) |
-- 
1.7.9.5