Get the Source and prebuild binary
==================================

  > mkdir ~/evb_rk3229
  > cd ~/evb_rk3229
  > git clone git://git.denx.de/u-boot.git
  > git clone https://github.com/OP-TEE/optee_os.git
  > git clone https://github.com/rockchip-linux/rkbin.git
  > git clone https://github.com/rockchip-linux/rkdeveloptool.git

Compile the OP-TEE
===============

  > cd optee_os
  > make clean
  > make CROSS_COMPILE=arm-none-eabi- PLATFORM=rockchip-rk322x
  Get tee-raw.bin in this step, copy it to U-Boot root dir:
  > cp out/arm-plat-rockchip/core/tee-raw.bin ../u-boot/tee.bin

Compile the U-Boot
==================

  > cd ../u-boot
  > make evb-rk3229_defconfig
  > TEE=tee.bin CROSS_COMPILE=arm-linux-gnueabihf- make

  Get u-boot-rockchip.bin in this step.

Compile the rkdeveloptool
=======================
  Follow instructions in latest README
  > cd ../rkdeveloptool
  > autoreconf -i
  > ./configure
  > make
  > sudo make install

  Get rkdeveloptool in you Host in this step.

Both origin binaries and Tool are ready now, choose either option 1 or
option 2 to deploy U-Boot.

Flash the image to eMMC
=======================
Power on(or reset with RESET KEY) with MASKROM KEY preesed, and then:
  > cd ..
  > rkdeveloptool/rkdeveloptool db rkbin/rk32/rk322x_loader_v1.04.232.bin
  > rkdeveloptool/rkdeveloptool wl 64 u-boot/u-boot-rockchip.bin
  > rkdeveloptool/rkdeveloptool rd

Flash the image to SD card
==========================
  > dd if=u-boot/u-boot-rockchip.bin of=/dev/sdb seek=64

You should be able to get U-Boot log message with OP-TEE boot info:

U-Boot TPL 2023.07-00524-gf5346eba55-dirty (Jul 15 2023 - 14:22:51)
Trying to boot from BOOTROM
Returning to boot ROM...

U-Boot SPL 2023.07-00524-gf5346eba55-dirty (Jul 15 2023 - 14:22:51 +0200)
Trying to boot from MMC1
I/TC:
I/TC: Non-secure external DT found
I/TC: Switching console to device: /serial@11030000
I/TC: OP-TEE version: 3.22.0-27-g893a762d1 (gcc version 10.3.1 20210621 (release) (15:10.3-2021.07-4)) #1 Sat Jul 15 12:14:36 UTC 2023 arm
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html
I/TC: Primary CPU initializing
M/TC: Not protecting region 1: 0x68400000-0x68600000
I/TC: Primary CPU switching to normal world boot


U-Boot 2023.07-00524-gf5346eba55-dirty (Jul 15 2023 - 14:22:51 +0200)

Model: Rockchip RK3229 Evaluation board
DRAM:  1 GiB (effective 992 MiB)
Core:  113 devices, 16 uclasses, devicetree: separate
MMC:   mmc@30000000: 1, mmc@30020000: 0
Loading Environment from MMC... Card did not respond to voltage select! : -110
*** Warning - No block device, using default environment

In:    serial@11030000
Out:   serial@11030000
Err:   serial@11030000
Model: Rockchip RK3229 Evaluation board
Net:
Warning: ethernet@30200000 (eth0) using random MAC address - 72:65:2b:f1:c5:0a
eth0: ethernet@30200000
Hit any key to stop autoboot:  0
=>


For more detail, please reference to:
http://opensource.rock-chips.com/wiki_Boot_option