check rtl iol values at settings
add 2~3 or so to the biggest rtl value you see and key it into rtl initial value
once u see that it boots with the right initial value , disable dram swizzling bit2 and key in rtls / iols manually with the settings you first see.
and then loosen or tighten from there, RTL and iol should usually move in opposite directions.
variables for rtl is mainly TCL and freq & command rate, and slightly twcl.