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Atm we may retrain the DP link even if the CRTC is inactive through HPD work->intel_dp_check_link_status(). This in turn can lock up the PHY (at least on BYT), since the DP port is disabled. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81948 Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: stable@vger.kernel.org (3.16+) Signed-off-by: Jani Nikula <jani.nikula@intel.com>