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drm/i915: Disable TRAINING_PATTERN_SET before stopping the TPS transmission
DP spec says: "The Source device shall start sending the idle pattern after it has cleared the Training_Pattern byte in the DPCD." Currently we do these in operations in the opposite order. Swap them around to match the spec. Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210118162107.18424-1-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak <imre.deak@intel.com>
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