Can I change output phase? (eMMC)

I would like to change the output phase of Sampling eMMC signal by changing the kernel of Jetson TX2. But I do not know which part of the kernel to fix. Could you help me?
Thank you.

tmdgus323,

Please refer to TX2 TRM to see if any register can change phase.

https://developer.nvidia.com/embedded/downloads# -> Tegra X2 (Parker Series SoC) Technical Reference Manual