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TDA4VM: DSS

Barry Maxiu
Intellectual 630 points
Part Number: TDA4VM


Tool/software:

Hi experts,

SDK8.6

J721E EVM board

1. We want to output DP + DSI at the same time. Do the hardware and software support it at the same time?

2. We see that in addition to modifying platform/j721e/rtos/common/app_cfg_mcu2_0.h

#undef ENABLE_CSI2TX #undef ENABLE_DSS_SINGLE #define ENABLE_DSS_DUAL  #define ENABLE_DSS_EDP #undef ENABLE_DSS_HDMI #define ENABLE_DSS_DSI

What modifications still need to be made?

Looking forward to your reply,Thanks

Regards,

Barry

  • 0
    TI__Guru**** 486775 points

    Hi Barry,

    Please find answers to your questions below.

    #1, yes, it is possible to output DP + DSI simultaneously. There isn't anything connected at the DSI output on EVM, so you might have to design some external board to get DSI output, but SW supports both the outputs. 

    #2, By default, dual display uses DP + HDMI output, you would need to change display controller tree to connect video pipelines to the DSI output. Please refer to ti-processor-sdk-rtos-j721e-evm-08_06_00_12\vision_apps\utils\dss\src\app_dss_dual_display_defaults.c to understand the existing display controller tree and to update it.

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Intellectual 630 points

    Hi Brijesh,

    Your reply is always useful.

    Change dual display to DP+DSI.

    Could you please send us the modifications that need to be made or the relevant threads?

    Looking forward to your reply.

    Regards,

    Barry

  • 0 in reply to Brijesh Jadav
    Intellectual 630 points

    Can SDK9.2 RTOS directly support DP+DSI?

  • 0 in reply to Barry Maxiu
    TI__Guru**** 486775 points

    Hi Barry,

    I think you can refer to the display controller tree for the single display for the DSI and you need to change dual display controller tree to output on DSI instead of HDMI. 

    Regards,

    Brijesh