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TDA4VM: Flickering in the Surround View application display.

Kaoru Mashiko
Intellectual 620 points

Part Number: TDA4VM

Hello TI Engineer,


I am developing an application based on the Surround View demo app (srv_demo) from sdk-rtos-j721e-evm-10_01_00_04.

During development, I needed to increase the number of queue buffers.
After making this change, I encountered an issue where the composed image flickers.

To verify, I applied the same modification to the Surround View demo app, and the same flickering behavior occurred.

By “flickering,” I mean that the composed image periodically turns completely black. However, the car icon remains visible during this phenomenon.

Could you please help investigate this issue?

[Modification: app_srv_camera.c]


#define NUM_BUFS                            (6u) /* (4u) */
#define NUM_INTERMEDIATE_BUFS               (6u)  /* (3u) */


Thank you.

  • +1
    TI__Mastermind 25570 points

    Hi Kaoru,

    If you are increasing the buffer depth then you have to change this macro,

    set APP_EGL_MAX_TEXTURES to 30 inside vision_apps/utils/opengl/src/a72/app_gl_egl_utils_linux.c

    Rebuild the sdk, and copy to sd card using "make linux_fs_install_sd"

    Regards,
    Gokul