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NWein's avatar
NWein
Icon for Occasional Contributor rankOccasional Contributor
5 years ago
Solved

Cannot get Cyclone 10 GX HDMI RX to lock

I'm using the Intel HDMI 2.0 RX IP on a Cyclone 10 GX, Quartus Prime Pro 20.2. I cannot get it to lock at any frequency. My video source is a Teledyne-Lecroy HDMI analyzer, so I feel comfortable th...
  • Deshi_Intel's avatar
    Deshi_Intel
    5 years ago

    Hi Neil,


    We suspect HDMI Rx failure encountered at your site is expected because you removed NIOS II design block which also function to perform CDR refclk switching from CDR refclk0 to CDR refclk1.

    • Your modified HDMI Rx design is now stuck with wrong (CDR refclk0) instead of using correct TMDS clock (CDR refclk1).


    In short, I believe you can follow below guideline that I drafted


    Guideline for modification to HDMI Rx only design should be like below :

    1. Option A : for customer that required quick XCVR power up calibration
    • Remove everything else but keep (HDMI Rx top, NIOS II design and also the design code with comment "// Workaround for long power-up calibration issue")
    1. Option B : for customer that doesn’t need “quick XCVR power up calibration” requirement
    • Remove everything else including NIOS II design, just keep HDMI Rx top only
      • Modify gxb_rx NativePHY IP to change default CDR refclk to 1 (refer to attached pic)
      • regenerate gxb_rx IP and recompile HDMI design again

    I am sorry Malaysia Cocid-19 situation is pretty bad where we are not allow to go back office until early Dec. I need to rely on you for now to help verify the HDMI design on hardware.


    Thanks for your understanding.


    Regards,

    dlim


NWein's avatar
NWein
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

1) We simply have not purchase the core yet, since we're still debugging a handful of units that are always running tethered. Once we have a larger number of devices to distribute to more software developers and/or testers, we'll buy the core. However, if we can determine that for some crazy reason the unlicensed mode *is* causing our problems, we can purchase the core (through Arrow). But according to all available information it *shouldn't* be the problem.

2) I'm running QPP 20.2 under Windows 10

3) I've been told that, for now, this forum is to be my primary source of support.

Thanks,

Neil