• Resolved

TPS65982: Display Port Video bypass from TPS65982+HD3SS460 at USB-C port 1 to USB-C Port 2 TPS65982+HD3SS460

Part Number: TPS65982

Hi,

we are trying to get video through our device from USB-C Port 1 to USB-C Port 2.

Both ports are identical. They contain TPS65982+HD3SS460.

Both ports configured from TPS65982 application customization tool to support Display port (see image).

Video signals connected from Port 1 to Port 2 (after HD3SS460) in next way:

Port 1 / Port 2

LN0 (p) -> LN3 (p)

LN0 (n) -> LN3 (n)

 LN1 (p) -> LN2 (p)

LN1 (n) -> LN2 (n)

 LN2 (p) -> LN1 (p)

LN2 (n) -> LN1 (n)

 LN3 (p) -> LN0 (p)

LN3 (n) -> LN0 (n)

Please help to find out why we can't pass video through our device?

Is something wrong with configuration?

Can we get some support from TI?
We are making device that soon should be in mass production and this issue is completely blocking all future work.

We are using MacBook Pro as video source and LG Ultra Fine monitor.

--

Best Regards,

Sergii

  • In reply to Sergii Makovetskyi:

    Hi Sergii,

    Sounds good!

    This is the link for the 82 EVM
    www.ti.com/.../tps65982-evm EVM&tisearch=Search-EN-Everything

    The link for the 'TPS65982-EVM Design Files' (can be found in the link above about half way down the page)

    If you require the DP-EXPANSION board sch let me know.

    Thanks

    Jeff

  • In reply to Jeffrey Mueller:

    Hi Jeff,
    I have 2x of this EVK :) can you please share sch for DP expansion board? Is it possible to buy it?
  • In reply to Sergii Makovetskyi:

    Hi Jeff,

    any news? I found SCH and checked that I have correct schematic connection. Will order kits and proceed with them, looks like there are something wrong in configuration (at our board)

    --

    Regards,

    Sergii

  • In reply to Sergii Makovetskyi:

    Hi Sergii,

    Sorry for the late reply.

    The DP expansion board can be bought here:

    www.ti.com/.../DP-EXPANSION-EVM expansion board&tisearch=Search-EN-Everything

    If you think the issue is in the configuration I will ask my team to look into your project file. I will update you asap with anything we find.

    Thanks

    Jeff

  • In reply to Jeffrey Mueller:

    Hi Jeff,

    yes, i already found that board and found that there are 2 different EVKs - for x82 and x86 ICs. We have x82 kits, without DP port.

    We have ordered 2x x86 kits + DP expansion board to test solution with MacBook and LG monitor.

    It will be good if your team will look into the project file.

    --

    Best regards,

    Sergii

  • In reply to Sergii Makovetskyi:

    Hi Sergii,

    I just wanted to update you, I am still looking into your pjt file with the team. I noticed the pjt file you sent me does not have a low region included. Can you send me the low region bin that you are using the pjt file with?

    note: When using the x86 EVM I had to change GPIO0,3,14 to 'plug event', 'AMSEL', and 'CC2 orientation' GPIO events respectively.

    Thanks

    Jeff

  • In reply to Jeffrey Mueller:

    Hi Jeff,
    I got kits and already made some testing, unfortunately that doesn't work..
    I have 2x TPS65986 kits + Display port expansion pack.
    1 PCB configured to UFP (0010 configuration)
    2nd PCB configured as DFP (1000 configuration)

    MacBook is able to detect that monitor is connected, MacBook could see LG USB Audio, and could see LG monitor, but video is absent and MacBook became to work too slow...

     _
    --
    Regards,
    Sergii

  • In reply to Sergii Makovetskyi:

    More info,
    I've made 2 additional tests:
    1) USB-C monitor connected via TPS65986 and DP board to Toshiba Laptop with miniDP connector - it works OK.
    2) DP monitor, connected via TPS65986 and DP board to MacBook USB-C - works OK too.
    So, looks like LG monitor doesn't want to work via USB-C to DP - USB-C link. Any suggestions?...
    --
    Best regards,
    Sergii
  • In reply to Sergii Makovetskyi:

    Hi Sergii,

    To clarify, you are using only 1 EVM for the two additional tests?
    What USB-C monitor did you use for additional test #1?  is that the same as the LG monitor?

    - try using a different monitor

    - try using a windows laptop.

    - try using config ID 5 instead of ID4 for the UFP.

    - You can also try to update or reinstall your graphics driver on your laptop.

    I would like to see a lecroy PD trace of the failing case too.

    Thanks

    Jeff

  • In reply to Jeffrey Mueller:

    Hi Jeff,
    - I have only 1 USB-C monitor - LG. So, i've used it for all tests. I have 2 of them and both works in same way.
    - I have no windows laptop with USB-C
    - yes, already did that - doesn't help ( try using config ID 5 instead of ID4 for the UFP.)
    - ok, will try to do that.
    I will be out of office 2 weeks and than back.
    Have you tried to do same test ? with macbook + usb-C monitor and this EVK boards?
    --
    Best regards,
    Sergii