Commands of setting output de-emphasis of DELLEMC S5448F-ON switch

Hi,

I have an issue with adjusting the output deemphasis of the S5448-ON switch in order to raise up the output amplitude of it. Does the switch have such command that can be used to control the Tx output?

Would somebody be so kind and share with me the source code of setting the Tx FIR or so?

Thanks a lot!