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We need this to avoid confusing the hw state readout code with the cpt pch plls at resume time: We'd read the new pipe state (which is disabled), but still believe that we have a life pll connected to that pipe (from before the suspend). Hence properly disable pipes to clear out all the residual state. This has the neat side-effect that we don't enable ports prematurely by restoring bogus state from the saved register values. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>