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DS90UB941AS-Q1: connect issue

chen zh
Intellectual 300 points
Part Number: DS90UB941AS-Q1

Dear TI:

          The ser-des connection is: host dsi->ub941->ub948->display

          We met one issue. The display work abnormal in the following sequence:

           1. system boot up

           2. Host dsi & UB941 init

           3. Do not UB948 initial work until UB948 is plugged in mannually(after 5 minutes).

           Then the display is abnormal.  Do it need to configure UB941 again when configuration UB948? Can you provide some example configuration? Thanks.

BRs,

Arvin

  • 0
    TI__Intellectual 1905 points

    Hi Arvin,

    Re: "The display work abnormal in the following sequence"

    Could you elaborate more on "abnormal"? More details would help us.

    Re: "Do it need to configure UB941 again when configuration UB948?"

    After UB941 is up and running, there should no need to anything after connecting to UB948. Could you share the register dump of the working case vs the case with the issue?

    Regards,

    Solomon

  • 0 in reply to Solomon Ali
    Intellectual 300 points

    Hi Solomon:

         Here "abnormal" means white display.

         If system boot up with plugin the cable, display is ok. The configuration is same with plugin manually.

  • +1 in reply to chen zh
    TI__Intellectual 1905 points

    Hi Arvin,

    It looks like you have opened a new ticket called "DS90UB941AS-Q1: white display issue" related to this topic. We can close this ticket and focus on the other one since it has more details.

    Please let me know if these are different topics and you would like to keep this open.

    Regards,

    Solomon