Hi Z, On 2024-04-08 09:40, Mizsei Zoltán wrote: > Hi, > > I'm trying to get a mainline U-Boot running on the Geniatech XPI-3566-ZERO > RK3566 based SBC [1], but all my attempts have failed so far. > > The SBC doesn't have any SD-Card slot, please keep this in mind! > > I can build U-Boot, but when I write the resulting binary to the eMMC using > rkdeveloptool, the boot stops and I see no output on the UART pins using > 1500000 baud transfer rate. > > My steps were the following: > > - git clone https://github.com/u-boot/u-boot > - cd u-boot > - CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 make rk3568_defconfig
There is no rk3568_defconfig target but generic-rk3568_defconfig may work better. > - ROCKCHIP_TPL='rkbin/bin/rk35/rk3566_ddr_1056MHz_v1.21.bin' > BL31='rkbin/bin/rk35/rk3568_bl31_v1.44.elf' CROSS_COMPILE=aarch64-linux-gnu- > make > - rkdeveloptool db MiniLoaderAll.bin > - rkdeveloptool wl 64 u-boot-rockchip.bin > > After that I can no longer communicate with the board via UART and it no > longer boots. After looking at the specification for this board it looks like GPIO pin 8 and 10 is connected to uart1 and not uart2 that is typically used for debug uart on rockchip devices. > > I've built uboot countless times, I've followed all sorts of guides, I've > tried modifying FDT and transplanting the DTS from the official SDK, I have > tried vanilla defconfigs and tried to modify them aswell, I think I've tried > everything, but no matter what I do I just can't get it working. > The vendored U-Boot works ok, but I plant to run OpenBSD, for which an > upstream U-Boot would be better situated (according to the OBSD mailing list). > > Please give me some hints because I'm running out of ideas. I've spent > countless hours trying to get this to work but haven't succeeded. You can try changing stdout-path to "serial1:1500000n8" and enable the uart1 node in generic-rk3568.dts. Also change to CONFIG_DEBUG_UART_BASE=0xFE650000, and also use rkbin tools/ddrbin_tool and change to use uart1 on ddr bin. After that you should probably start seeing something on uart and that may help you get a little bit further. Regards, Jonas > > Thank You very much! > > Best Regards, > > --Z-- > > [1] https://www.geniatech.com/product/xpi-3566-zero/
