[Intel-gfx] [PATCH 08/28] drm/i915: implement WaGTEnableMiFlush on VLV

[Jesse Barnes]

We don't generally use MI_FLUSH these days, but this bit may affect
other flushing logic, so set it to be safe.

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 1d5d613..e82b994 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -524,10 +524,14 @@ static int init_render_ring(struct intel_ring_buffer *ring)
 		I915_WRITE(GFX_MODE,
 			   _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_ALWAYS));
 
-	if (IS_GEN7(dev))
+	if (IS_GEN7(dev)) {
 		I915_WRITE(GFX_MODE_GEN7,
 			   _MASKED_BIT_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) |
 			   _MASKED_BIT_ENABLE(GFX_REPLAY_MODE));
+		if (IS_VALLEYVIEW(dev))
+			I915_WRITE(MI_MODE, I915_READ(MI_MODE) |
+				   _MASKED_BIT_ENABLE(MI_FLUSH_ENABLE));
+	}
 
 	if (INTEL_INFO(dev)->gen >= 5) {
 		ret = init_pipe_control(ring);
-- 
1.7.9.5