Hi all,
We bought an i.MX8M mini LPDDR4 EVK board to try-out some stuff (8MMINILPD4-EVK). To be a bit flexible, I want it to boot completely from SD card. To get started, I followed the instructions in the i.MX Yocto Project User's Guide to flash an SD card with a complete .wic image. This _should_ also include a bootloader able to boot the board. So I built the image with yocto so it creates a .wic image, flashed it to SD card using dd (according to instructions) and set the boot switches on the board to boot from MicroSD/SDHC2.
But the board does not boot. Nothing happens on the serial port. I have tried pretty much all options I could think of, but I can't get it to boot from SD card. This is what I tried:
- imx-4.14.78-1.0.0_ga release
- imx-5.4.3-2.0.0 relase
- imx-5.4.24-2.1.0 release
- imx-5.4.47-2.2.0 release
- imx-image-core target
- imx-image-multimedia target
I configured the build system with "DISTRO=fsl-imx-wayland MACHINE=imx8mmlpddr4evk EULA=y source imx-setup-release.sh -b evk"
Then I added IMAGE_FSTYPES = "ext4 wic.bz2" ti local.conf to make the build work (as described in this thread).
But that still doesn't work for some reason. I get absolutely nothing from the serial port. So I can also not really see what is going wrong. The kernels and filesystems work, but it seems the U-Boot bootloader from SD card is not doing what it should.
Can you give me a procedure or tell me what I am doing wrong to try to boot the LPDDR4 EVK board from SD card?
Note: The green status LED on the piggyback CPU board also stays off.
