drm/i915: Disable power asynchronously during DP AUX transfers
In a follow-up patch we will restrict holding the reference on the AUX power domain to the AUX transfer function. To avoid the unnecessary on-off-on power togglings drop the reference asynchronously. There is no reason we couldn't do this in general and also put the reference asynchronously in pps_unlock(); but that's a separate change that can be done as a follow-up. Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190509173446.31095-6-imre.deak@intel.com
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