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DS90UB949A-Q1EVM: After insert the HDMI Valid clock not detected at HDMI input.

xinyu wu
Prodigy 115 points
Part Number: DS90UB949A-Q1EVM
Other Parts Discussed in Thread: DS90UB949A-Q1, ALP

Dear TI，


I am using DS90UB949A-Q1 EVM to implement the HDMI to FPD-Link III scheme, and I want to display the resolution of 1920X1080.

But now when I plug in the HDMI source, the ALP software shows no HDMI input, and when I read the 0x0C register, it has a value of 0x00. Can you take a look at this problem?

Have a good life，

Xinyu.

  • 0
    Prodigy 115 points

    In order to facilitate your analysis, I have something to add.
    We use the DP output data of SOC to convert it into HDMI (2.0) data, and then connect it to the EVM adapter board.
    When HDMI is directly connected to the monitor, the monitor displays normally. However, after connecting the adapter board, check the HDMI function page with the ALP software and find that HDMI freq is not detected.
    Note: I haven't connected the screen with the deserializer yet. I just want to observe whether the adapter board can receive data after HDMI is inserted. But now he can't accept it. Can you help me see this problem?
    Thank you.

  • 0
    Prodigy 115 points

    Fullscreen 613_re.txt Download 
    [REGISTERS]
Device = ALP Nano 1 - DS90UB949, Connector 1
Comments = ""
Date = 06/13/2022
Time = 17:04:41
Reg = 0,0x0000,0x18
Reg = 0,0x0001,0x00
Reg = 0,0x0003,0xDA
Reg = 0,0x0004,0x80
Reg = 0,0x0005,0x00
Reg = 0,0x0006,0x00
Reg = 0,0x0007,0x00
Reg = 0,0x0008,0x00
Reg = 0,0x0009,0x00
Reg = 0,0x000A,0x00
Reg = 0,0x000B,0x00
Reg = 0,0x000C,0x00
Reg = 0,0x000D,0x20
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0x88
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x00
Reg = 0,0x0016,0xFE
Reg = 0,0x0017,0x1E
Reg = 0,0x0018,0x7F
Reg = 0,0x0019,0x7F
Reg = 0,0x001A,0x01
Reg = 0,0x001B,0x00
Reg = 0,0x001C,0x00
Reg = 0,0x001D,0x00
Reg = 0,0x001E,0x05
Reg = 0,0x001F,0xF5
Reg = 0,0x0020,0x00
Reg = 0,0x0021,0x00
Reg = 0,0x0022,0x25
Reg = 0,0x0023,0x00
Reg = 0,0x0024,0x00
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x00
Reg = 0,0x0027,0x00
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x20
Reg = 0,0x002A,0x20
Reg = 0,0x002B,0xA0
Reg = 0,0x002C,0x00
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x00
Reg = 0,0x0033,0x00
Reg = 0,0x0034,0x00
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0x00
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x00
Reg = 0,0x003D,0x00
Reg = 0,0x003E,0x00
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x14
Reg = 0,0x0041,0x5C
Reg = 0,0x0042,0x00
Reg = 0,0x0043,0x00
Reg = 0,0x0044,0x80
Reg = 0,0x0045,0x00
Reg = 0,0x0046,0x00
Reg = 0,0x0047,0x00
Reg = 0,0x0048,0x01
Reg = 0,0x0049,0x68
Reg = 0,0x004A,0x01
Reg = 0,0x004B,0x00
Reg = 0,0x004C,0x00
Reg = 0,0x004D,0x00
Reg = 0,0x004E,0x00
Reg = 0,0x004F,0x00
Reg = 0,0x0050,0x17
Reg = 0,0x0051,0xA1
Reg = 0,0x0052,0x1E
Reg = 0,0x0053,0x00
Reg = 0,0x0054,0x28
Reg = 0,0x0055,0x0C
Reg = 0,0x0056,0x00
Reg = 0,0x0057,0x00
Reg = 0,0x0058,0x00
Reg = 0,0x0059,0x00
Reg = 0,0x005A,0x02
Reg = 0,0x005B,0x20
Reg = 0,0x005C,0x02
Reg = 0,0x005D,0x06
Reg = 0,0x005E,0x44
Reg = 0,0x005F,0x00
Reg = 0,0x0060,0x22
Reg = 0,0x0061,0x02
Reg = 0,0x0062,0x00
Reg = 0,0x0064,0x10
Reg = 0,0x0065,0x00
Reg = 0,0x0066,0x00
Reg = 0,0x0067,0x00
Reg = 0,0x0068,0x00
Reg = 0,0x0069,0x00
Reg = 0,0x006A,0x00
Reg = 0,0x006B,0x00
Reg = 0,0x006C,0x00
Reg = 0,0x0070,0x00
Reg = 0,0x0071,0x00
Reg = 0,0x0072,0x00
Reg = 0,0x0073,0x00
Reg = 0,0x0074,0x00
Reg = 0,0x0075,0x00
Reg = 0,0x0076,0x00
Reg = 0,0x0077,0x00
Reg = 0,0x0078,0x00
Reg = 0,0x0079,0x00
Reg = 0,0x007A,0x00
Reg = 0,0x007B,0x00
Reg = 0,0x007C,0x00
Reg = 0,0x007D,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x00
Reg = 0,0x00A3,0x00
Reg = 0,0x00C0,0x00
Reg = 0,0x00C1,0x00
Reg = 0,0x00C2,0xA8
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x40
Reg = 0,0x00C5,0x00
Reg = 0,0x00C6,0x00
Reg = 0,0x00C7,0x00
Reg = 0,0x00C8,0x40
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00CE,0xFF
Reg = 0,0x00D0,0x00
Reg = 0,0x00D1,0x00
Reg = 0,0x00D2,0x00
Reg = 0,0x00D3,0x00
Reg = 0,0x00E0,0x00
Reg = 0,0x00E1,0x00
Reg = 0,0x00E2,0xA8
Reg = 0,0x00E3,0x00
Reg = 0,0x00E4,0x40
Reg = 0,0x00E5,0x08
Reg = 0,0x00E6,0x00
Reg = 0,0x00E7,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x34
Reg = 0,0x00F5,0x39
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00

  • 0
    TI__Mastermind 29575 points

    Hi Xinyu,
    Thanks for the details!
    In order to get an HDMI signal detection, you need to connect a Deserializer to the DS90UB949A-Q1 Serializer. Otherwise, without a Deserializer connection, you would need to set register 0x5C bit[6] high - (board.WriteI2C(serAddr,0x5C,0x42)) to force link detection without a Deserializer connection present.

    Regards,

    Fadi A.

  • 0 in reply to Fadi Abdulhameed
    Prodigy 115 points

    Hi Fadi,

    Thank you very much for your reply. I tried to set register 0x5C to 0x42, but I still couldn't receive the HDMI signal. At the same time, I would like to ask that the output signal of my SoC terminal is to convert DP signal into HDMI 2.0 signal, will it have any impact? Ds90ub949 converter board can accept HDMI 2.0 signal? Because the HDMI interface I saw in the data sheet of the converter board is HDMI version 1.4.

    Thank you,

    Xinyu

  • 0 in reply to xinyu wu
    Prodigy 115 points

    Hi Fadi,

    HDMI input is already detected, thank you very much.

    Regards,

    Xinyu

  • 0 in reply to xinyu wu
    TI__Mastermind 29575 points

    No Problem. Glad it worked!