Using grub-image ?

[amiraeva]

I got grub to work as an EFI payload from uboot, only caveat is that the display doesn't work. Install grub with --target=arm64-efi and --removable flags, and use the following boot script (adjust as needed to your setup):

Code:

setenv bootargs initrd=/boot/initramfs-linux.img console=ttyS0 console=tty1 root=LABEL=ROOT_MNJRO rw rootwait video=eDP-1:1920x1080@60 video=HDMI-A-1:1920x1080@60 bootsplash.bootfile=bootsplash-themes/manjaro/bootsplash
load mmc 1:1 ${fdt_addr_r} dtbs/rockchip/rk3399-pinebook-pro.dtb
load mmc 1:1 ${kernel_addr_r} efi/EFI/BOOT/BOOTAA64.EFI
bootefi ${kernel_addr_r} ${fdt_addr_r}

And grub.cfg (adjust to your setup)

Code:

set timeout_style="menu"
set timeout=5
menuentry "Kernel" {
linux (hd0,msdos1)/Image console=tty1 root=LABEL=ROOT_MNJRO rw rootwait video=eDP-1:1920x1080@60 video=HDMI-A-1:1920x1080@60 bootsplash.bootfile=bootsplash-themes/manjaro/bootsplash
devicetree (hd0,msdos1)/dtbs/rockchip/rk3399-pinebook-pro.dtb
initrd (hd0,msdos1)/initramfs-linux.img
}

I've been poking around the u-boot source code to try and get the eDP and LCD drivers working <https://github.com/amiraeva/uboot-pbp>. So far I can get the display to flicker for a brief second before the u-boot serial console loads, and have run out of things to try. Any ideas/suggestions would be appreciated!