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TPS65982 DP VDM

Nic Lin
Intellectual 2020 points


Hi Team,

I get below DP VDM from the CC Analyzer. But I can not find any explanation of these messages in the Type-C or PD2.0 Spec. For example, what is the meaning of DFP_D? Would you tell me where to find the explanation?

Best Regards

Nic

  • 0
    TI__Expert 6430 points

    Hi Nic,

    This log shows alternate mode communication to enable DisplayPort feature.

    DFP_D means the device is configured in Downstream facing display port and UFP_D means Upstream facing display port.

    You can refer VESA and USB PD spec to learn more about these terminologies.

    Thanks,

    Rahul

  • 0 in reply to Rahul Sharma16
    TI__Intellectual 2020 points
    Hi Rahul,

    I have got the DisplayPort v1.3 Spec. But I still can not find any explanation of the grey VDO(DP Status Cmd & DP Configure Cmd)shown above.
    What's the definition of the terminologies such as Con, Pow Low, Adaptor Func, Multi-Func, USB Config, Exit DP, HPD State, IRQ_HPD, etc. ?

    Best Regards
    Nic
  • 0 in reply to Nic Lin
    TI__Expert 6430 points
    Hi Nic,

    Please check "Section G. VDM Command Examples" of USB PD spec.

    Some of the terminologies which I remember is as follows:
    Exit DP: This command says to exit the DP mode
    HPD: Short form of Hot Plug Detect, this signal indicates whenever a display device gets connected to the system
    HPD State: says current state of HPD
    IRQ_HPD: the interrupt which deals with HPD event

    Thanks,
    Rahul
  • 0 in reply to Rahul Sharma16
    TI__Intellectual 2020 points

    Hi Rahul,

    "Section G. VDM Command Examples" just contains commands that defined in the PD Spec. SVID specific commands can not be found in the PD Spec.

    Best Regards

    Nic