How to boot imx8MP with USDHC1(use sd1_data0~sd1_data7 to connect a emmc to boot imx8mp)
Please refer these guides:
https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Boot-from-emmc-mmc0/ta-p/1531233
https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Enabling-uSDHC1-of-i-MX8MM-Based-On-L5-4...
By default, imx8mp does not support booting from sd1, so the method of referring to the document is not the same as my needs:
more information may be needed to realize imx8mp booting from sd1 interface as emmc device