From 8968a3649a7c09a0c7f92001b0a599b93a4d9685 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 12 Apr 2017 00:44:26 +0100
Subject: [PATCH] drm/i915: Pretend the engine is always idle when mocking
Git-commit: 8968a3649a7c09a0c7f92001b0a599b93a4d9685
Patch-mainline: v4.13-rc1
References: FATE#322643 bsc#1055900

If we have a mock engine and it has no more requests in flight, report
it as idle as there is no hardware to contradict us! Otherwise we
attempt to query the hw that doesn't exist and find that the hw hasn't
set its idle bit and we get upset.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170411234427.14841-2-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_engine_cs.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1156,6 +1156,9 @@ bool intel_engine_is_idle(struct intel_e
 			       intel_engine_last_submit(engine)))
 		return false;
 
+	if (I915_SELFTEST_ONLY(engine->breadcrumbs.mock))
+		return true;
+
 	/* Interrupt/tasklet pending? */
 	if (test_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted))
 		return false;