I am able to follow the above steps in https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/08_06_00_42/exports/docs/linux/Foundational_Components/U-Boot/UG-General-Info.html#build-u-boot in HS-FS section and generate the images tispl.bin, tiboot3.bin.
But I did not generate all the supportive images, instead I have made use of the images present in prebuilt folder . i.e. bl31.bin, bl32.bin, ipc_echo_testb_mcu1_0_release_strip.xer5f (since other are images are with the unsigned extension I am concluding these are signed images please correct if am wrong). And I have exported the supporting variables also to the prebuilt images path .i.e.
export DMFW_DIR=/home/smcpu/ti-processor-sdk-linux-am62xx-evm-08.06.00.42/board-support/prebuilt-images/
export OPTEE_DIR=/home/smcpu/ti-processor-sdk-linux-am62xx-evm-08.06.00.42/board-support/prebuilt-images/
export SYSFW_DIR=/home/smcpu/ti-processor-sdk-linux-am62xx-evm-08.06.00.42/board-support/prebuilt-images/
Actually we need this approach, we want to go with default OPTEE and ATF configuration. We have ordered the proto board , please confirm whether the above approach using default supporting bins works , and also please share the link how to flash these images(If it is different from the standard procedure creating boot and rootfs partition) . We would like to see the booting and authentication process until the uboot on HW.