PROCESSOR-SDK-J721E: PROCESSOR-SDK-J721E

Please find my responses below each of the points, highlighted in bold.

Viswanathan Ramasamy said:

a. What is the difference between the step 1.2 and step 1.3 ie

   1.2. Building the SDK with Yocto and 1.3 Simplified SDK Build using Top-Level Makefile

1.2. Building the SDK with Yocto — Processor SDK Linux for J721e Documentation

1.3. Simplified SDK Build using Top-Level Makefile — Processor SDK Linux for J721e Documentation

Section 1.2 of the document is the procedure to build the complete system from scratch using Yocto. It will build everything from the bootloader, kernel, filesystem/applications. This is the super set.

Section 1.3 describes the ways to build the bootloader, kernel and other applications without having to build the entire filesystem - developers working with u-boot, kernel, optee can use this methodology of building. You can consider this as the subset.

Viswanathan Ramasamy said:

b. What is the HDD space required to build the step1.2 

TOOLCHAIN_BASE=<PATH_TO_TOOLCHAIN> MACHINE=<machine> bitbake -k tisdk-default-image

The tisdk-default-iamge will need about 200GB-250GB of disk space to complete the build. Note that this step is optional since the prebuilt filesystem is packaged in the SDK under board-support/filesystem.

Viswanathan Ramasamy said:

c. After the successful compilation of the step 1.2, where the SDK bin  
ti-processor-sdk-linux-j7-evm-08_00_00_08-Linux-x86-Install.bin file will be located in the deploy folder. whether this command will generate the SDK bin?

After successful compilation for Step 1.2, the output is a filesystem which will be under the deploy folder in the tar.xz format and along with this you will also have all the boot binaries - tiboot3.bin etc.

Viswanathan Ramasamy said:

d. when we will go for step 1.2 if 1.3 is available?

Already answered as part of the above responses.

a. If i need to include new application, I need to add the recipe details in the configs/processor-sdk-linux/processor-sdk-linux-08_00_00.txt. make changes in the top level make file. Is my understanding correct?
c. What is the command to generate the ti-processor-sdk-linux-j7-evm-08_00_00_08-Linux-x86-Install.bin?

Viswanathan Ramasamy said:

a. If i need to include new application, I need to add the recipe details in the configs/processor-sdk-linux/processor-sdk-linux-08_00_00.txt. make changes in the top level make file. Is my understanding correct?

This is incorrect.

If you need to include a new application, you will need to add the recipe (if it is not present) or include the recipe into the packagegroup (if the recipe is available already) into one of the meta-layers under sources/meta-*, and generate the build.

The configs/processor-sdk-linux/processor-sdk-linux-08_00_00.txt is a reference to TI's SDK 8.0.

Viswanathan Ramasamy said:

c. What is the command to generate the ti-processor-sdk-linux-j7-evm-08_00_00_08-Linux-x86-Install.bin?

The installer is generated by the target arago-core-tisdk-bundle and some scripts which put that into a TI click wrap license. 

Refer: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/08_00_00_08/exports/docs/linux/Overview_Building_the_SDK.html#build-options