[Intel-gfx] [PATCH] drm/i915: Limit VF cache invalidate workaround usage to gen9

[Ben Widawsky]

It is unclear if this is even required on BXT.

Cc: Imre Deak <imre.deak at intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky at intel.com>
---
 drivers/gpu/drm/i915/intel_lrc.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 519cea32..0d35e94 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1716,14 +1716,14 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
 		flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
 		flags |= PIPE_CONTROL_QW_WRITE;
 		flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;
-	}
 
-	/*
-	 * On GEN9+ Before VF_CACHE_INVALIDATE we need to emit a NULL pipe
-	 * control.
-	 */
-	vf_flush_wa = INTEL_INFO(ring->dev)->gen >= 9 &&
-		      flags & PIPE_CONTROL_VF_CACHE_INVALIDATE;
+		/*
+		 * On GEN9: before VF_CACHE_INVALIDATE we need to emit a NULL
+		 * pipe control.
+		 */
+		if (IS_GEN9(ring->dev))
+			vf_flush_wa = true;
+	}
 
 	ret = intel_logical_ring_begin(request, vf_flush_wa ? 12 : 6);
 	if (ret)
-- 
2.6.4