Commit 39e84937 authored by Chris Wilson's avatar Chris Wilson

drm/i915: Skip engine serialisation for no-op seqno reset

If the engine's seqno is already at our target seqno (most likely it
hasn't been used since the last reset), we can skip serialising the
engine and leave it as is.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181126095610.20962-1-chris@chris-wilson.co.uk
parent b7f21899
......@@ -136,6 +136,9 @@ static int reset_all_global_seqno(struct drm_i915_private *i915, u32 seqno)
intel_engine_get_seqno(engine),
seqno);
if (seqno == engine->timeline.seqno)
continue;
kthread_park(engine->breadcrumbs.signaler);
if (!i915_seqno_passed(seqno, engine->timeline.seqno)) {
......
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