drm/i915/selftests: Check RPS controls
Check that the GPU does respond to our RPS frequency requests by setting our desired frequency. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200420172739.11620-3-chris@chris-wilson.co.uk
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