• State
  • Locked Locked
  • Replies 6 replies
  • Subscribers 33 subscribers
  • Views 309 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

Linux/DS90UB929-Q1: DS90UB929 HDMI HPD signal is always low

DS90UB949-Q1: UB949

zhouyz zhou
Prodigy 80 points
Part Number: DS90UB949-Q1

   hi  ti:

   i use ub949 connect PC  ,and tips no freq?

  • 0
    TI__Mastermind 22990 points

    Hi Zhouyz,

    Could you please share more info about what the issue is? What deserializer are you using? HPD will only be asserted if there is lock with the DES.

    Regards,
    Ikram

  • 0 in reply to Ikram Haque
    Prodigy 80 points

    deserializer is UB948 

  • 0 in reply to Ikram Haque
    Prodigy 80 points

    Ｉ　use my pc HDMI source , UB949 tips no activity source, why?  I connect UB948

  • 0 in reply to zhouyz zhou
    TI__Mastermind 22990 points

    Hi, are you getting lock between the SER-DES pair? Please refer to the EVM user guides as well to use the correct mode selections.

    Could you tell us about what steps you have taken to set this up?

    Regards,
    Ikram

  • 0 in reply to Ikram Haque
    Prodigy 80 points

      hi IKram: 

        I set UB949 register:  

    [MCU2_0] 13.275613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x1 Value 0x0 !
    [MCU2_0] 13.280613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x3 Value 0xda !
    [MCU2_0] 13.285613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x4 Value 0x88 !
    [MCU2_0] 13.290613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x14 Value 0x5 !
    [MCU2_0] 13.295613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x1e Value 0x1 !
    [MCU2_0] 13.300613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x20 Value 0x0 !
    [MCU2_0] 13.305613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x54 Value 0xa0 !
    [MCU2_0] 13.310613 s: DSS HDMI: Write Success for ClientAddr 0x1a RegAddr 0x5b Value 0xa3 !
    [MCU2_0] 13.315613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x0 Value 0x34 !
    [MCU2_0] 13.320613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x5b Value 0xa3 !
    [MCU2_0] 13.325613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x5a Value 0x1 !
    [MCU2_0] 13.330613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x5d Value 0x6 !
    [MCU2_0] 13.335613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x5e Value 0x44 !
    [MCU2_0] 13.340613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x5f Value 0x64 !
    [MCU2_0] 13.345613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0xf1 Value 0x55 !
    [MCU2_0] 13.350613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0xc Value 0x9 !
    [MCU2_0] 13.355613 s: DSS HDMI: Read Success for ClientAddr 0x1a RegAddr 0x4f Value 0x0 !

  • 0 in reply to zhouyz zhou
    TI__Mastermind 22990 points

    Hi Zhouyz,

    Do you have lock with the 948 deserializer? Please check the lock status. The HPD signal will be asserted after getting lock with the DES. Are you testing these with TI EVMs or a custom board?  Please make sure the correct mode selections are used to get PLL lock.

    - Ikram