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HSW+ platforms are able to send out HDR Metadata SDP DIP packet as GMP. Hence, extending the support for HDR on DP encoders for the same. v2: Limited to non eDP ports on hsw/bdw and removed it for lspcon as it is done separately (suggested by Ville) v3: Added helper and limited eDP restriction to port A (Ville) v4: Dropped some redundant checks (Ville) Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/5389 Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Uma Shankar <uma.shankar@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220324120438.1876445-1-uma.shankar@intel.com