drm/i915: pixel multiplier readout support for pch ports
Now that we painstakingly track the shared pch dplls we can finally implement pixel mutliplier readout support for pch ports, too. v2: Undo the temporary hack to disable the sdvo pixel multiplier cross-checking. Cc: Imre Deak <imre.deak@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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