Dear Coreboot list, I'm still trying to bring up custom mainboard with Apollo Lake E3950 SoC and LPDDR4 memory. I have successfully built images with different payloads that passes all the initializations but all of them fails to boot further:
1. Coreboot + Seabios + bootable USB with Linux. Stuck when booting from USB (but I am able to reboot the system using a Ctr-Alt-Del on a keyboard) 2. Coreboot + Seabios + memtest. Stuck on booting memtest (CtrAltDel does nothing) 3. Coreboot + Seabios + coreinfo. General protection fault 4. Coreboot + LinuxBoot. Works on QEMU, hangs on my board (CtrAltDel does nothing) Looks like a hardware or FSP configuration issue. But I cannot find a way to debug this thing and find the reason. For instance, how I can understand why Linux kernel (or memtest) fails to boot when there is no debug output at all?
You will find Coreboot logs and .config for Seabios image (memtest, coreinfo, usb).
PS Still have no HDMI output and DCI debug. Serial console is my only option for now.
Best Regards, Anatolii Vorobev