Commit 39e84937 authored Nov 26, 2018 by 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: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181126095610.20962-1-chris@chris-wilson.co.uk

parent b7f21899

drivers/gpu/drm/i915/i915_request.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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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