[Intel-gfx] [PATCH 1/2] drm/i915/gen8: Invalidate TLBs before PDP reload

[Ben Widawsky]

This is a spec requirement for all rings.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_gem_context.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 5b4a9a0..1ac648f 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -870,6 +870,9 @@ int i915_switch_context(struct intel_engine_cs *ring,
 	if (from == to && !to->remap_slice)
 		return 0;
 
+	if (IS_GEN8(ring->dev))
+		WARN_ON(ring->flush(ring, I915_GEM_GPU_DOMAINS, 0));
+
 	if (ring->id == RCS)
 		return do_switch_rcs(ring, from, to);
 	else
-- 
2.0.1