For this situation, I think either you use the wrong u-boot nor you don’t write u-boot to SPI Flash correctly.
You can try this u-boot for SPI Flash.
And follow the steps below to write u-boot to spi flash.
tftp 1080000 vim3.u-boot.spi.bin
sf probe
sf erase 0 +$filesize
sf update 0x1080000 0 $filesize
after update debug line has changed into:
G12B:BL:6e7c85:2a3b91;FEAT:E0F83180:402000;POC:B;RCY:0;SPINOR:0;0.
and it boots now with and without sd card just from nvme, this is good news, thanks
I could not verify if my spi image was correctly transferred, md5sum /dev/mtdblock0 gave me different checksum than transferred image, also there are some strange warnings like:
Loading Environment from SPIFlash… SF: Detected w25q128fw with page size 256 Bytes, erase size 4 KiB, total 16 MiB
*** Warning - bad CRC, using default environment
It doesn’t matter and just load default environment.