Sabre SD has them but HW guide states they are no longer needed because they have on-chip pull downs. I did not implement these in my design but it gets me wondering why it says "no longer". Was this fixed with a new series of chips, if so, how do I know I get the new ones? Do pull downs need to be activated or are they active by default?
I am using iMx6Q with T topology 4xDDR3L chips total of 16Gb and only the DRAM_SDCKE0.