From 2a37049a2f8df56d79160f47ec214d4135982e71 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 26 Nov 2018 09:56:10 +0000 Subject: [PATCH] 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 Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20181126095610.20962-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_request.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index 71107540581dc..ca95ab2f4cfa3 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -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)) { -- 2.39.5