TDA4VM: Should DSS be handled on RTOS or Linux side in J721E SDK?

pooja baadkar

Part Number: TDA4VM

Tool/software:

I’m working with the Processor SDK RTOS v11.0.0.6 on J721E and need clarification on the display pipeline.

Should the Display Subsystem (DSS) be configured and handled from the RTOS side or the Linux side?

In our setup, we want to render frames to a display panel using DSS. We are using components from vision_apps and want to know the best practice:

Should DSS be initialized and controlled from RTOS (e.g., via R5F firmware)?
Or should it be handled from the Linux side using DRM/KMS or Wayland?

Please guide us on the recommended approach, especially considering typical Processor SDK examples.

Thanks in advance,
Pooja

2 months ago

0 Takuma Fujiwara 2 months ago

TI__Guru 51303 points

Hi Pooja,

If the components from vision_apps is used, then RTOS DSS would be most recommended. The RTOS display driver via R5F firmware is the default for vision_apps and it should free up some loading from the A72 cores. You can take a look at the surround view demo block diagram which has a data flow for a complex application that uses the R5F for display node: https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/11_00_00_06/exports/docs/vision_apps/docs/user_guide/group_apps_srv_demos_app_srv_camera.html

On the other hand, Linux display driver will give more flexibility to use some open source projects, and allow display compositor like Wayland to be ran.

Regards,

Takuma

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TDA4VM: Should DSS be handled on RTOS or Linux side in J721E SDK?