drm/i915/dp: Disable Port sync mode correctly on teardown
While clearing the Ports ync mode enable and master select bits we need to clear the register completely instead of using disable masks v3: * Remove reg variable (Matt) v2: * Just write 0 to the reg (Ville) * Rebase Bugzilla: https://gitlab.freedesktop.org/drm/intel/issues/5 Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Fixes: 51528afe ("drm/i915/display/icl: Disable transcoder port sync as part of crtc_disable() sequence") Signed-off-by: Manasi Navare <manasi.d.navare@intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191228031204.10189-3-manasi.d.navare@intel.com
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