Compiler/PROCESSOR-SDK-DRA8X-TDA4X: TDA4X kernel quickly start use init-demo.sh

Hi Karthik,

      Thanks for your reply, but we know the init-demo.sh must work at falcon mode, could the tda4x work at falcon mode?

Regards,

Jason

Hi Jason,

From a user space script perspective, it shouldn't matter whether it is falcon mode or not as long as the dependencies are met at the time of execution.

If you need additional details, please provide further information on your trials with TDA4.

Regards

Karthik

Hi Karthik,

       I use TDA4VM chip. On tda2xx, we just need to config  CONFIG_SPL_OS_BOOT=y in the file u-boot/spl/include/autoconf.mk, so the falcon mode could be enable. But I can't found the file in the folder ~/ti-processor-sdk-linux-automotive-j7-evm-07_00_00/board-support/u-boot-2020.01+gitAUTOINC+f9b0d030d3-gf9b0d030d3 ,please tell me how to enable the falcon mode in the TDA4VM.

Regards,

Jason

Hi Keerthy,

     Thanks for you help, would it be supported in the future?For the kernel started so slowly, we need to start it quickly.

Regards,

Jason

Hi Keerthy,

       I tried to set the falcon mode like TDA2, so I added CONFIG_SYS_SPL_ARGS_ADDR=0x82f80000 and CONFIG_SPL_OS_BOOT=y to the j721e_evm_a72_defconfig file, and set the environment variables like this:

setenv falcon_image_file Image;

setenv falcon_args_file single-stage-boot.dtb;

setenv boot_os 1;

and I put the single-stage-boot.dtb and Image files in the BOOT partition, but an error is reported when running boot:

spl: falcon_args_file not set in environment, falling back to default
spl_load_image_fat_os: error reading image args, err--2,

and there are falcon_args_file=single-stage-boot.dtb and falcon_image_file=Image in the environment variables, I don’t know why it can’t be found.

Anyway, if the falcon mode wouldn't be supported on the TDA4VM in the future, how could we started the kernel as quickly as on the TDA2X?  

Regards,

Jason

Hi Jason,

TDA4 Boot architecture different compared to TDA2:

Refer Section: 3.1.1.2.3
Link: http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components_U-Boot.html#general-information

So first we boot with the R5 SPL which in turn get ATF(Arm Trusted Firmware) on A72 followed by OPTEE & only
then we get to A72 SPL Followed by A72 u-boot.

Enabling falcon mode on TDA4 will not be same as TDA2. Hence i kindly advise you to not try based on TDA2.

I will get back on the availability of falcon mode in the future releases.

Best Regards,
Keerthy

Hi keerthy,

       Thanks very much for you help.Our project needs to be applied to falcon mode of the kernel as soon as possible, like using init-demo.sh to start apps.out on TDA2X. We hope to receive further information from you. If there is any information, please tell me through this issue, or send an email to huangjiasheng@yihang.ai to inform me about how to obtain the release package including  the availability of falcon mode. Thanks.

Best Regards,

Jason