SK-TDA4VM: rtos SDK（(ti-processor-sdk-rtos-j721e-evm-08_00_00_12) can't display throuth HDMI

I am using SDK ti-processor-sdk-linux-j7-evm-08_00_00_08 display through HDMI and It works normal.

But I built rtos SDK（ti-processor-sdk-rtos-j721e-evm-08_00_00_12)  and installed to SD card, rootfs is default: ti-processor-sdk-linux-j7-evm-08_00_00_08/filesystem/tisdk-default-image-j7-evm.tar.xz, display through HDMI does't works. Run vision apps demo there is also no display through HDMI.

I have modified app_cfg_mcu2_0.h  vision_apps_build_flags.mak  and k3-j721e-vision-apps.dts as below,but it didnot work.

/////////////////////app_cfg_mcu2_0.h

#define  ENABLE_DSS_SINGLE

#undef ENABLE_DSS_DUAL

#undef ENABLE_DSS_EDP

#define ENABLE_DSS_HDMI

#undef ENABLE_DSS_DSI

#define ENABLE_I2C

#define ENABLE_BOARD

////////////////vision_apps_build_flags.mak

BUILD_ENABLE_ETHFW?=no

//////////////k3-j721e-vision-apps.dts(linux-sdk)

&main_i2c1 {
//status = "disabled";
};

Something else need to modify? Could I get some examples of HDMI display(RTOS SDK) ?

Thanks.

Cherry Zhou：

Hi we have received your question and feedback to the engineer, please expect the response. Thanks!

,

Cherry Zhou：

Hi,

The HDMI port was not exposed on the TDA4VM-EVM, and RTOS SDK 08_00_00_12 version was built for TDA4VM-EVM. We have a newer version of the SDK 08_00_01_10 with support for the SK board.

Could you go through this documentation to install 08_00_01_10 version of RTOS SDK: http://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-sk-tda4vm/08_00_01_10/exports/docs/development_flow.html

A new build flag BUILD_EDGEAI was introduced in the newer RTOS SDK version. One of the thing that this does is it sets BUILD_MCU_BOARD_DEPENDENCIES=no in vision_apps/vision_apps_build_flags.mak. This will then undefine BUILD_MCU_BOARD_DEPENDENCIES in vision_apps/apps/basic_demos/app_rtos/common/concerto.mak. Lastly, this will affect app_cfg_mcu2_0.h by selecting the #else statement and undefining everything. This is because for the SK board, interfaces such as HDMI is controlled by the HLOS on the A72 instead of the MCU on the EVM boards.

Hope this will be helpful.

,

Guifeng Gao：

Thanks. We have downloaded latest RTOS SDK version num.08_00_01_10. We will use it to check hdmi.

Another question as below:

"We have a newer version of the SDK 08_00_01_10 with support for the SK board."  ——Does this SK RTOS（08_00_01_10 version）is the same branch with RTOS SDK 08_00_00_12？

Or, does this SK RTOS（08_00_01_10 version）have another matching LINUX SDK？We use Linux SDK ti-processor-sdk-linux-j7-evm-08_00_00_08 now.

,

Cherry Zhou：

Hi,

Yes, there is a Linux SDK that matches the RTOS SDK which are both used to build the Edge AI SDK.

The link for the installation is here:

https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/08_00_01_13/

,

Guifeng Gao：

Hi cherry I have checked HDMI with the latest RTOS SDK, It can works normal. One more question to confirm "This is because for the SK board, interfaces such as HDMI is controlled by the HLOS on the A72 instead of the MCU on the EVM boards." ——ON SK board，I ran vision app demo through HDMI display, but the monitor didn't respond and output below error log: Can the vision app demo run on the monitor of the HDMI interface?

,

Guifeng Gao：

Hi Cherry

I have communicated with Takuma directly in the English Forum. Thanks for your support.

Best Regards.

,

Cherry Zhou：

Hi Dear,

Noted and we will close the thread here first, if you need additional help please feel free to reach out me. Thanks.

Best Regards,

Cherry