Hi Jonas,

thank You, i tried my best to follow your hints as good as possible. This is what i did:

- git clone https://github.com/rockchip-linux/rkbin - git clone https://github.com/u-boot/u-boot - modified the following files:

``` diff --git a/arch/arm/dts/rk3568-generic.dts b/arch/arm/dts/rk3568-generic.dts index 88eb1bfd..847ebd51 100644 --- a/arch/arm/dts/rk3568-generic.dts +++ b/arch/arm/dts/rk3568-generic.dts @@ -16,7 +16,7 @@ };

chosen { - stdout-path = "serial2:1500000n8"; + stdout-path = "serial1:1500000n8"; }; };

@@ -43,6 +43,7 @@ status = "okay"; };

-&uart2 { +&uart1 { status = "okay"; }; + diff --git a/configs/generic-rk3568_defconfig b/configs/generic-rk3568_defconfig index e7d5e55b..aeb117e7 100644 --- a/configs/generic-rk3568_defconfig +++ b/configs/generic-rk3568_defconfig @@ -6,7 +6,7 @@ CONFIG_NR_DRAM_BANKS=2 CONFIG_DEFAULT_DEVICE_TREE="rk3568-generic" CONFIG_ROCKCHIP_RK3568=y CONFIG_SPL_SERIAL=y -CONFIG_DEBUG_UART_BASE=0xFE660000 +CONFIG_DEBUG_UART_BASE=0xFE650000 CONFIG_DEBUG_UART_CLOCK=24000000 CONFIG_SYS_LOAD_ADDR=0xc00800 CONFIG_DEBUG_UART=y ```

- modified this file: ``` diff --git a/tools/ddrbin_param.txt b/tools/ddrbin_param.txt index 0dfdd31..826f927 100644 --- a/tools/ddrbin_param.txt +++ b/tools/ddrbin_param.txt @@ -9,7 +9,7 @@ lp4_freq= lp4x_freq= lp5_freq=

-uart id= +uart id=1 uart iomux= uart baudrate= ```

- Runned the following command: # ./ddrbin_tool rk3566 ddrbin_param.txt ~/rkbin/bin/rk35/rk3566_ddr_920MHz_v1.21.bin version v1.19 20240117 chip rk3566 version 5

new bin config: uart id: 1 modify end

The file modification date changed, so i assume it should be ok.

- Runned the following commands: # CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 make generic-rk3568_defconfig O="build/generic-rk3568_defconfig" #ROCKCHIP_TPL='~/rkbin/bin/rk35/rk3566_ddr_920MHz_v1.21.bin' BL31='~/rkbin/bin/rk35/rk3568_bl31_v1.44.elf' CROSS_COMPILE=aarch64-linux-gnu- make O="build/generic-rk3568_defconfig"

I have acquired the MiniLoaderAll.bin via extracting the official update.img from the vendor. # rkdeveloptool db MiniLoaderAll.bin # rkdeveloptool wl 64 '~/u-boot/build/generic-rk3568_defconfig/u-boot-rockchip.bin'

- Then i have connected my USB-UART adapter to BOARD PIN 8 (GND) -> USB UART PIN GND BOARD PIN 10 (UART1_TX) -> USB UART PIN RX BOARD PIN 12 (UART1_RX) -> USB UART PIN TX

- Started minicom: # minicom -D /dev/ttyUSB0 -b 1500000

But i still don't get any output at all.

Any idea what iam i doing wrong here?

Best Regards, -- ext

Jonas Karlman írta 2024. ápr.. 8, H-n 21:31 órakor:

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/