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TDA4VE-Q1: How to control CSI_TX to enable or disable streaming

CHENG NUO
Prodigy 40 points
Part Number: TDA4VE-Q1

Tool/software:

Hi experts,

Our system utilizes Maxim SerDes to transmit the ECU output image data to the IDC.

Maxim has specified a timing requirement: The ECU SoC must enable streaming only after the SerDes configuration is fully completed.

To comply with this requirement, we plan to implement control over the CSI_TX interface to dynamically enable/disable streaming.

Could you please confirm whether the TDA4 processor supports controlling CSI_TX to enable or disable streaming when needed?

  • 0
    TI__Guru**** 454485 points

    Hi,

    What do mean by enabling/disabling streaming? Can you please elaborate on it? if clock remains active, would that be ok? 

    In general, if you dont submit any frames to display, it would not stream anything on CSI lanes, but clock could still be active.. Would this be ok? 

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Prodigy 40 points

    Hi Brijesh,

    Disable streaming means that even if the CSI_TX module receives image data, it will not send it out.

    Preferably, both the data lane and the clock lane are not working.

  • 0 in reply to CHENG NUO
    TI__Guru**** 454485 points

    Hi Cheng,

    Well, as i explained, if you dont submit the new frame data, it would not transmit it, so even if clock lane is active, data lanes would not be active.. so if this is what you are looking for, you can just avoid submitting data to CSITX. 

    If you want to stop even CSITX clock lane, then please dont even call vxVerifyGraph OpenVX API and complete SERDES configuration before calling this API. 

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Prodigy 40 points

    Hi Brijesh,

    Is it possible that even if I keep submitting new frame data, CSI_TX will still not send it?

  • 0 in reply to CHENG NUO
    TI__Guru**** 454485 points

    Hi Cheng,

    no it isn't possible in the current implementation of the node and csitx driver. 

    Regards,

    Brijesh