drm/i915/selftests: Delay spinner before waiting for an interrupt
It seems that although (perhaps because of the memory stall?) the spinner has signaled that it has started, it still takes some time to spin up to 100% utilisation of the HW. Since the test depends on the full utilisation of the HW to trigger the RPS interrupt, wait a little bit and flush the interrupt status to be sure that the event we see if from the spinner. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Andi Shyti <andi.shyti@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200417093928.17822-1-chris@chris-wilson.co.uk
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23122a4d
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