Quoting Chris Wilson (2020-12-08 18:57:02)
> @@ -5015,6 +5010,7 @@ gen11_emit_fini_breadcrumb_rcs(struct i915_request
> *request, u32 *cs)
>
> static u32 *gen12_emit_preempt_busywait(struct i915_request *request, u32
> *cs)
> {
> + *cs++ = gen12_preparser_disable(true); /* Wa_1607297627:tgl,dg1,rkl */
> *cs++ = MI_SEMAPHORE_WAIT_TOKEN |
> MI_SEMAPHORE_GLOBAL_GTT |
> MI_SEMAPHORE_POLL |
I'm wondering if MI_SEMAPHORE_POLL prevents idling & RDOP, so the w/a is
not required?
-Chris
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