drm/i915: Minimize the huge amount of unecessary fbc sw cache clean.

[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_ringbuffer.c

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 922d6bc1a1b3574d0cc53f7f42c9761789d2e989..620a89dc868b4cfcc23ed50be64bb1b0fdd752b6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2237,6 +2237,7 @@ static int gen6_ring_flush(struct intel_engine_cs *ring,
                           u32 invalidate, u32 flush)
 {
        struct drm_device *dev = ring->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
        uint32_t cmd;
        int ret;
 
@@ -2267,8 +2268,12 @@ static int gen6_ring_flush(struct intel_engine_cs *ring,
        }
        intel_ring_advance(ring);
 
-       if (IS_GEN7(dev) && !invalidate && flush)
-               return gen7_ring_fbc_flush(ring, FBC_REND_CACHE_CLEAN);
+       if (!invalidate && flush) {
+               if (IS_GEN7(dev))
+                       return gen7_ring_fbc_flush(ring, FBC_REND_CACHE_CLEAN);
+               else if (IS_BROADWELL(dev))
+                       dev_priv->fbc.need_sw_cache_clean = true;
+       }
 
        return 0;
 }