AnsweredAssumed Answered

PTN3460I - PC Recognizes Monitor, But Unable to Connect/Send Video

Question asked by Kyle Trenholm on Jun 26, 2020
Latest reply on Jul 12, 2020 by Jozef Kozon

Hello!

 

I'm running into an issue using a PTN3460I to convert DP to LVDS in EDID Emulation mode.  Specifically, when I try to connect the display to my Windows 10 PC, I am able to see that a display is connected in the "Display Settings", but I am unable to enable it.  When I choose "Extend desktop to this display" from the Multiple Displays dropdown menu, I see a brief flicker as if it is attempting to connect, but it never actually sends video, and the Multiple Displays dropdown returns to "Disconnect this display".

 

It's worth noting, the DP is being run through a DP to USB-C converter, then being converted back to DP before entering the PTN3460I.  Like so:

 

 

I assume at least some of information is transmitting properly via the AUX lines, since Windows is seeing a display, but why would it not be able to send video to the PTN3460I?  I should be able to at least put video out to the PTN3460I regardless of if the video controller/LCD Panel on the other side is receiving, correct? 

 

Could it be the EDID itself?  I have attached the bin file I am using for use with an AUO G215HVN1.0.  The actual block of EDID and Config data I am sending (I2C via microcontroller) is as follows:

static const uint8_t EDID_Bytes[EDID_SIZE] =
/*00*/{0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x3B, 0x10, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
/*10*/ 0x01, 0x1E, 0x01, 0x04, 0xA5, 0x4F, 0x00, 0x00, 0x00, 0x9A, 0xD5, 0xA3, 0x55, 0x55, 0x9F, 0x27,
/*20*/ 0x0C, 0x50, 0x54, 0x00, 0x00, 0x00, 0x59, 0xC0, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00,
/*30*/ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x1C, 0xC0, 0x64, 0x30, 0x38, 0x28, 0x40, 0x00, 0x00,
/*40*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00,
/*50*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00,
/*60*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*70*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE7,
/*EDID ENDS @ 0x7F*/
/*ADDITIONAL CONFIG*/
/*80*/ 0x00, 0x0B, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00,
/*90*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*A0*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*B0*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*C0*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*D0*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/*E0*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x34, 0x56, 0x78,
/*F0*/ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

This should be a match for the bin file.

 

Could the conversion to USB-C be causing the problem?  I had thought the conversion was OK since I am able to see the monitor in Windows, but maybe I am mistaken?

 

Any thoughts/suggestions are greatly appreciated.

 

Thanks!

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