drm/i915/psr: disable aux_frame_sync on psr2 exit
Screen freeze observed if AUX_FRAME_SYNC is not disabled on psr2 exit.AUX_FRAME_SYNC needed for psr2 is enabled during psr2 entry. It must be disabled on psr2 exit. v2: rebase Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Jim Bride <jim.bride@linux.intel.com> Signed-off-by: NVathsala Nagaraju <vathsala.nagaraju@intel.com> Signed-off-by: NPatil Deepti <deepti.patil@intel.com> Reviewed-by: NRodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484147673-2044-1-git-send-email-vathsala.nagaraju@intel.com
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