Hello!!
I use ti-processor-sdk-linux-am57xx-evm-06.03.00.106 on am5749(custom board).
I use 2 Gb RAM without ECC. I no Have eMMC.
For a configuration of RAM I used EMIF Tool.
For a building I use config: am57xx_evm_defconfig.
I made a chenges like was discribed in this document: https://www.ti.com/lit/an/sprac36e/sprac36e.pdf?ts=1598257428040&ref_url=https%253A%252F%252Fwww.google.com%252F