How to change boot device?

Eric_Woudstra · February 2, 2023, 11:35am

Check here (stable-5.10-rock5 branch):

radxa/u-boot/blob/5753b21aa92481ec3191fdf1f4d53274590ac5aa/include/configs/rockchip-common.h#L159


	"name=system,size=2048M,uuid=${uuid_gpt_system};" \
	"name=metadata,size=16M,uuid=${uuid_gpt_metadata};" \
	"name=vendor,size=32M,uuid=${uuid_gpt_vendor};" \
	"name=oem,size=32M,uuid=${uuid_gpt_oem};" \
	"name=frp,size=512K,uuid=${uuid_gpt_frp};" \
	"name=security,size=2M,uuid=${uuid_gpt_security};" \
	"name=userdata,size=-,uuid=${uuid_gpt_userdata};\0"


#define RKIMG_DET_BOOTDEV \
	"rkimg_bootdev=" \
	"if nvme dev 0; then " \
		"setenv devtype nvme; setenv devnum 0; echo Boot from nvme;" \
	"elif mmc dev 1 && rkimgtest mmc 1; then " \
		"setenv devtype mmc; setenv devnum 1; echo Boot from SDcard;" \
	"elif mmc dev 0; then " \
		"setenv devtype mmc; setenv devnum 0;" \
	"elif mtd_blk dev 0; then " \
		"setenv devtype mtd; setenv devnum 0;" \
	"elif mtd_blk dev 1; then " \
		"setenv devtype mtd; setenv devnum 1;" \
	"elif mtd_blk dev 2; then " \

Even if your device starts with SD (as it always should if it is a valid SPL boot.) then U-Boot get’s started from SD card. But then:

It seems then that NVME is checked first, only for presence, and if present chosen as boot device.

I would change the order here and build a new u-boot and write it to SD card, If I were you.