Only queue a CS flip if the outstanding request is not complete, and in particular do not rely on the request tracking being fresh (since it is only updated when requests are retired). Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_display.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index eef858d5376f..f227cdaf38ec 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11309,8 +11309,11 @@ static bool use_mmio_flip(struct intel_engine_cs *ring, !reservation_object_test_signaled_rcu(obj->base.dma_buf->resv, false)) return true; + else if (!obj->last_write.request || + i915_gem_request_completed(obj->last_write.request)) + return true; else - return ring != i915_gem_request_get_engine(obj->last_write.request); + return ring != obj->last_write.request->engine; } static void skl_do_mmio_flip(struct intel_crtc *intel_crtc, -- 2.7.0.rc3 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
