drm/i915: Drop unused engine->irq_seqno_barrier w/a

Now that we have eliminated the CPU-side irq_seqno_barrier by moving the
delays on the GPU before emitting the MI_USER_INTERRUPT, we can remove
the engine->irq_seqno_barrier infrastructure. Though intentionally
slowing down the GPU is nasty, so is the code we can now remove!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181228171641.16531-6-chris@chris-wilson.co.uk

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 13ac01b67ead..f8d3090ed193 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -711,10 +711,6 @@ out:
 static struct i915_request *reset_prepare(struct intel_engine_cs *engine)
 {
         intel_engine_stop_cs(engine);
-
-        if (engine->irq_seqno_barrier)
-                engine->irq_seqno_barrier(engine);
-
         return i915_gem_find_active_request(engine);
 }