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Questions tagged [displayport]

Questions relating to DisplayPort, a digital display interface that can also carry audio and other data.

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DisplayPort video into a Cyclone V FPGA

I designed a carrier board that has a Type6 CPU module that outputs DisplayPort to a Altera 5CGXFC7D6F27I7N Cyclone V FPGA. The FPGA firmware contains DisplayPort IP. I am having problems getting the ...
miggyEE's user avatar
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116 views

Raspberry PI (CM4) video to USB-C DisplayPort alt mode

I'm working on a project where I aim to utilize a USB-C port to embed both video signals and USB functionality. USB-C's "Alt Modes" offer potential solutions, namely DisplayPort (DP) Alt ...
nowox's user avatar
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TUSB106 To DP Port and USB

I have a SOM which is having USB Type C + DP , Now I need to develop a carrier Board for the following requirement as given in Block diagram. Is TUSB1064 Will capable of doing that, as mentioned in ...
Pavan Kumar's user avatar
1 vote
1 answer
76 views

Can I run PoE++ on DisplayPort/HDMI over Cat6?

I'm working on a project for an industrial application where I need to run a monitor with a single cable carrying both data and power. 7" LCD with a few Watts backlight, 1024x600@30fps or so, ...
Mitcham Tuell's user avatar
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Multiple SP4T switches in single package?

I am trying to make my own KVM switch with DisplayPort connectors. I have 4 inputs + 1 output (bidirectional), so I need a SP4T switch (I have chosen the Infineon Technologies BGSA14GN10 (which is an ...
YANNTASTIC5915's user avatar
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235 views

Display Port 1.4 Hot Plug Detect (HPD) Behaviour on AMD 7040 Motherboard

For some reason I can't get my DP port working on the AMD 7040 motherboard that I have designed, where on the same board, I have also Mini-DP that has an identical electrical circuit (in schematic) ...
Firas Abd El Gani's user avatar
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154 views

How to set the transimission line impedance of Type-C to DisplayPort?

I have drawn a PCB adapter board to convert the Type-C signal to DisplayPort, using the CYPD3120 scheme from Infineon. The schematic is as follows: (A clearer version can be found here Schematic.pdf) ...
Vinker's user avatar
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Which parameters should be compared to to replace N-MOSFETS with different package but with same pin functionality?

Since NTZD3154N is used a lot in my design, and I have BSS138PS only for used for one circuit, I want to replace BSS138PS with NTZD3154N in the following DP++ Auxiliary Conversion Block: Note: This ...
Firas Abd El Gani's user avatar
3 votes
1 answer
1k views

EDID emulation in HDMI and DisplayPort, is DisplayPort really more difficult?

I've been doing a lot research on EDID and HDMI and DisplayPort and I have a question about the relative difficulty of always-on EDID Emulation between the two specs. With HDMI, almost every Matrix ...
Evan Carroll's user avatar
1 vote
2 answers
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Can I go from USB C->A->C without losing any capability? (video signal especially) [closed]

I have a monitor that takes USB-C for video input and passes mouse and keyboard back. I need to connect to this through a bulkhead, and most connectors seem to be USB-A. Though they mention being USB ...
new2cad's user avatar
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DisplayPort Alt-Mode and USB4.0 port on USB Type-C Connector

I'm building an AMD FP7r2 based platform and I have a USB Type-C port to which I want to connect USB 4.0 signals. The USB4.0 signals can be also used for DisplayPort (the APU supports this switch), ...
Firas Abd El Gani's user avatar
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1 answer
50 views

How much is the video timing error allowance in DisplayPort?

Video timing standards for example DMT, CVT provide information about the timing requirements of various video frame components like vertical/horizontal blank/active/total etc. DisplayPort operates in ...
lousycoder's user avatar
2 votes
1 answer
151 views

AMD R6000 CPU - DisplayPort dual-mode feature

In the past I have designed a platform that used an Intel Tiger Lake (Gen 11) CPU and now I have a new project that uses the AMD R6000 series. Different from Intel, the design of the DP++ feature ...
Firas Abd El Gani's user avatar
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1 answer
342 views

The DisplayPort PCB footprint I'm looking for doesn't exist in KiCad

Sometimes when I search KiCad for a PCB footprint, I get no results. For example, "DisplayPort" (part number 472720001). Edit: I'm happy to make the footprint myself, but I'd rather download ...
Nick Bolton's user avatar
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2 answers
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Is it possible to route DPs to HDMI from the HD3SS215 without using vias?

I'm working with the HD3SS215 and have found that while the datasheet does have a typical application for HDMI (9.2.2, p19), it is difficult to route to that connector from the IC; the pinout from the ...
Nick Bolton's user avatar
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2 votes
1 answer
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DisplayPort with unpowered sink: EDID possible?

When using dvi or hdmi, the source provides 5V to power an eeprom inside a monitor or any other sink, reading the edid back and setting the resolution accordingly. That is possible because both dvi ...
PhreakShow's user avatar
1 vote
1 answer
486 views

Difference between YCbCr Simple 4:2:2 and Native 4:2:2

For YCbCr, what is the difference between Simple 4:2:2 and Native 4:2:2? There is a Display Port Spec that references both of them, but doesn't distinguish between the two. I understand what YCbCr and ...
Yet Another Michael's user avatar
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3k views

How to connect DisplayPort signals respectively for sink and source applications?

I am using the TPS65988 PD controller and TUSB546A-DCI for USB TYPE C with alternate mode application. I am a little bit confused about how to connect DisplayPort signals respectively. Firstly I found ...
devscg's user avatar
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1 answer
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TPD8S009 ESD port nomenclature matter

I'm designing with a TPD8S009 part, and I'm not strictly following the D0+, D0- array stated on the chip. I'm connecting it as shown in the below snapshot. Is this okay? The datasheet simplified ...
Chance K's user avatar
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1 vote
2 answers
510 views

How do I interpret DisplayPort blanking interval timing diagrams?

When I see above image, I'm able to make sense of terms like vertical/horizontal blanking. When I come across diagrams like this: snapshot of this: Similarly, a snap of this: I'm not able to ...
lousycoder's user avatar
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102 views

Video Output by USB-C

I'm working on a electronic design that includes USB-C and requires video output. I have read USB-C Specification and, as I understand it, the only way to get video output is by DisplayPort. TUSB1046- ...
Juanma's user avatar
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1 vote
1 answer
94 views

How can I feed images from a Raspberry Pi to a very old handheld projector?

I have this very old handheld projector: And its connector cable looks like this (5mm wide, white), if I am not mistaken: My questions are two-fold: Can anyone guess what standard/format of input ...
Nick Lee's user avatar
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155 views

TTP223 capacitive sensor on USB switch takes two presses to work

I'm trying to solder a TTP223 capacitive touch sensor to a USB switch (specifically a "UGREEN USB 3.0 Switch, 2 In 4 Output") to rig a sort of capacitive KVM switch to a desk PC I'm building,...
ktx's user avatar
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1 vote
2 answers
627 views

What is the difference between link rate and pixel rate in Display Port?

I was going through the Display Port Specification. I came across the below para: "1.7.1 Make-up of the Main Link The Main Link consists of one, two or four AC-coupled, doubly terminated ...
sobin thomas's user avatar
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136 views

DisplayPort, high speed data transfer & breadboards

I want to experiment with hooking up a laptop display to a desktop computer. From what I've read, in terms of connectivity this should not be too hard - modern laptop displays use eDP (embedded ...
Sam van Herwaarden's user avatar
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1 answer
177 views

Auxiliary channel signals in display port

Can anyone tell me the significance or functionality of auxiliary channel(P and N) in display port interface.
Shifali's user avatar
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0 answers
263 views

Confusion with mini displayport

I am designing a board which converts DisplayPort to LVDS, in order to drive cheap panels from older notebooks or off ebay. DP is free of charge, compared to HDMI, and a simple converter IC is ...
PhreakShow's user avatar
1 vote
1 answer
2k views

Does USB-C Alternate Mode require the Billboard Device to be always connected?

I'm working on a device design that operates in USB-C alternate mode as a displayport dongle. As such it requires a USB 2.0 billboard device to be present to negotiate with the host and enter alt ...
K_Trenholm's user avatar
1 vote
1 answer
241 views

Trace width for breaking out 100Ω differential microstrip from 0.5mm pitch BGA

See bottom of post for the actual questions First, some context: I'm making a DisplayPort switch as a hobby project DisplayPort's high speed lines require 100Ω ± 10% differential impedance, which I'...
小太郎's user avatar
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1 vote
0 answers
423 views

DisplayPort without AUX channel

Reading the VESA 1.2 spec it seems that the AUX channel may not be essential to the correct functioning of the video channel, i.e. if we already know the EDID data and don't need to do any calibration,...
perencia's user avatar
  • 234
1 vote
1 answer
789 views

Does DisplayPort support scaling natively?

In the DisplayPort Wikipedia page, in advantages section it is stated that "Can drive display panels directly, eliminating scaling and control circuits and allowing for cheaper and slimmer displays". ...
Idk's user avatar
  • 13
0 votes
1 answer
2k views

LVDS data rate to TFT

I have a two LVDS Ports (A & B) coming from deserializers connected to a 10.25" TFT display. lvdsaclkp, lvdsaclkn, lvdsa[0:3]p/n lvdsbclkp, lvdsbclkn, lvdsb[0:3]p/n VESA: JEITA: What is the ...
user avatar
1 vote
1 answer
762 views

USB TYPE-C ALT-MODE DisplayPort + USB 2.0, is it supported?

DipslayPort 4 lanes are supported through usb type-c alternate mode. USB power delivery and usb 2.0 is always supported with the displayport alternate mode. Powerdelivery is not crucial however usb ...
mbt28's user avatar
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5 votes
0 answers
619 views

What is needed to convert 2 DisplayPort lanes into 4?

Essentially, I'm trying to connect a source with only two HBR2 lanes to a device that requires four HBR1 lanes. Theoretically, the bandwidth is there. But what kind of an IC would I need to accomplish ...
Alex West's user avatar
0 votes
1 answer
808 views

Does polarity of differential DisplayPort signals matter

I am routing a DisplayPort interface. I know from PCIe that the polarity of the differential pairs does not matter. So if it is helpful during routing I can connect the n to the p pin and vice-versa. ...
Reto's user avatar
  • 265
3 votes
1 answer
7k views

Wiring Embedded Display Port (eDP) to a full-size Display port

In spare time, I repair laptop computers. Pretty much all of the screens in them now use this "eDP" Display Port technology and I thought "this could turn out to be great for troubleshooting" because ...
James Mason's user avatar
0 votes
1 answer
79 views

Why would data transferred through an extension cable be different [closed]

This is something that has been bothering me especially when dealing with the latest cables made for DisplayPort or HDMI. I understand that issues can occur with adapters since you might be dealing ...
Max's user avatar
  • 13
5 votes
2 answers
338 views

Do HDMI/DVI and DisplayPort transfer only differences or full frames?

Let's assume I have a static computer desktop on my external display that is attached by HDMI (or equivalently, it could be attached by DVI, as DVI and HDMI are compatible). The 60Hz picture doesn't ...
juhist's user avatar
  • 1,673
4 votes
1 answer
2k views

Displayport clock recovery

The displayport protocol runs at a fixed frequency of either 1.62GHz, 2.7GHz, or 5.4GHz. The pixel stream (strm_clk) it carries runs at an arbitrary frequency and is likely to be asynchronous to the ...
Ran's user avatar
  • 41
0 votes
1 answer
183 views

Creating a displayPort Signal

I am attempting to create a displayPort source signal from scratch. I just read through the 1.1 Specification (which is outdated and free on the displayPort website) and it gave a decent overview. ...
BPoy's user avatar
  • 37
11 votes
2 answers
21k views

Disabling DisplayPort hot plug detect

I have a PC with a DisplayPort monitor. When the monitor sleeps or is powered off, the OS loses track of the current display resolution. My research indicates this is probably due to the Hot Plug ...
Ouroborus's user avatar
  • 211
4 votes
2 answers
6k views

Why DisplayPort cables must isolate the power pin?

I've been investigating why my 2560×1440 DisplayPort monitor and my mini-DisplayPort MacBook Air don't play along, and, it turns out, this is likely due to a wire in the cable that connects the two ...
cnst's user avatar
  • 227
2 votes
1 answer
5k views

Converting DisplayPort to 24 bit RGB parallel. Possible?

Is it possible to interface a DP1.1 complaint source to a TFT Module that uses 24 bit RGB? I'm investigating the possibility of interfacing an Atom D2550 with This Display. I have 3 options to ...
Gustavo Corona's user avatar