[PATCH 09/33] no-write-flush
Chris Wilson
chris at chris-wilson.co.uk
Wed Dec 20 22:33:56 UTC 2017
---
drivers/gpu/drm/i915/intel_ringbuffer.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index bb152b2d994b..87913acd377c 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -74,6 +74,8 @@ gen2_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
if (mode & EMIT_INVALIDATE)
cmd |= MI_READ_FLUSH;
+ if (!(mode & EMIT_FLUSH))
+ cmd |= MI_NO_WRITE_FLUSH;
cs = intel_ring_begin(req, 2);
if (IS_ERR(cs))
@@ -125,6 +127,8 @@ gen4_render_ring_flush(struct drm_i915_gem_request *req, u32 mode)
if (IS_G4X(req->i915) || IS_GEN5(req->i915))
cmd |= MI_INVALIDATE_ISP;
}
+ if (!(mode & EMIT_FLUSH))
+ cmd |= MI_NO_WRITE_FLUSH;
cs = intel_ring_begin(req, 2);
if (IS_ERR(cs))
--
2.15.1
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