Re: [PATCH] drm/i915/selftests: add test to verify get/put fw domains

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<snip>

+
+	for_each_engine(engine, i915, id) {
+		i915_reg_t offset = RING_START(engine->mmio_base);

I had a failure on the BCS on gen8 with this register in my trybot run. Maybe we can use RING_MI_MODE instead? if we wait for idle at the beginning of the test we should always have the IDLE bit set, so we're guaranteed a non-zero value with FW.

Daniele
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