GRL is the leading contributing lab for DP compliance test development and works with all key players in the DP standard.

DP 1.4 and DP over USB Type-C (DP Alt Mode) logo Certification, pre-compliance and debugging services for Sources, Sinks, Cables, Adapters, & Hubs:

 

  • Electricals at all rates (RBR, HBR, HBR2, HBR3)
  • Link Layer & EDID
  • Interoperability
  • Multi-Stream (MST) and other optional DP features
DisplayPort DP40 / DP 80 UHBR Cable logo certification service and Early DP 2.1 test services for Source and Sink are also available. 

Contact GRL for details.

DisplayPort Test

 

DisplayPort Test

DisplayPort (DP) interface originated from its release in mid-2006. Its interface applications are widely used in desktops, laptops, screens, adapters, and cables, and it is one of the well-known interfaces in the European and American markets. This interface is designed to replace the traditional VGA, DVI, and FPD-Link (LVDS) interfaces. The latest DisplayPort technology is DisplayPort 2.1, it can reach 20G per channel, and the resolution can reach 16K 60Hz. For more information, please refer to: https://vesa.org/

 

DisplayPort Official Certification: VESA

The Video Electronics Standards Association (VESA) is a non-profit organization comprised of more than 280 manufacturers of software, hardware, computers, monitors, and parts. Their main goal is to standardize digital video interface technology. In particular, this interface is exempt from paying royalties. If you want to know more about the VESA Association, please refer to: http://www.vesa.org/

 

VESA announces the latest version of the Specification

VESA DisplayPort (DP) Standard Version 2.1 – 10 October 2022

 

Certification Area

DisplayPort can be certified by product types.

Examples below

- DP 1.4

 

- DP 2.1

 *DP40 and DP80 cables are available in both Full-Size, and Mini DisplayPort cable configurations and are fully backward compatible with devices supporting DisplayPort link rates previously defined and currently in use, including RBR (Reduced Bit Rate), HBR (High Bit Rate), HBR2, and HBR3.

* Regarding DisplayPort Alt mode (DP over USB Type-C), the full-feature USB-C cable can already support UHBR transfer rate, and the "USB Type-C to DisplayPort cable" has obtained VESA DP cable certification. In addition, the DP active cable certification program using LRD and LTTPR Re-timer will be launched soon.

 

Technical Resource

  • Application Note: DisplayPort™ 2.1 Overview
  • Application Note: VESA Adaptive-Sync Introduction
  • Webinar Presentation: DisplayPort Receiver Test & Project

DisplayPort Certification Process

 

DisplayPort Certification Process

 Image below

 certification

 

(1) Become a VESA member

Visit the association website to check whether your Company Name is an association member. Click here to check

Members can be OEM or Branding manufacturers, choose one.

If not, apply for the membership at https://vesa.org/join-vesamemberships/ (Online Application)

 

 

(2) Provide sample information. What is CDF/HDCP Form/Family model list?

  • CDF (Capability Declaration Form):
    This form will record the capabilities of your product. The standard test is in progress, and it will be confirmed whether the content you filled in and the test result are consistent. This form is necessary for testing. You need to be a member of the association to download it.
  • HDCP Form:
    This form is optional. If your product supports HDCP1.x or HDCP2.x, you have to provide this document.
    The HDCP Form can be found on the 
    “DCP Official Webpage”.

For DisplayPort certification, HDCP2.x and HDCP1.x are optional test items, but if HDCP2.x is supported, it needs to pass the test.

  • Family Model list:
    The main certified model is if there is an extended model (Family Model), no additional testing is required. Please provide the Family Model application form to GRL before the certification, and we will help you submit it to the Association for review, 
    Download the Family Model list.

The family Model should follow the below conditions:

    • The extended model has no hardware changes (except for the case design, and color change)
    • No software & firmware changes for extended models
    • The DisplayPort hardware design on the extended model remains unchanged

 

(3) If your product has a USB Type-C® connector and it supports DP alternative mode, need to provide VIF (Vendor Information File) & USB Type-C information

  • VIF (Vendor Info File)
    If your product has a USB-Type-C connector and supports DP alternative mode. VIF is required for testing.
    VIF records the capabilities of your product PD. When testing, the standard test instrument will need to import this file to compare the actual functions of the product. This file is necessary for testing, please prepare it before sending it for testing.

The VIF Generator can be downloaded from USB-IF's website.

  • USB Type-C information

If the product is a USB Type-C connector, please provide information about the controller/chip used by the product. This is a necessary document for testing. <Download document>

 

(4) Once the product passes the test

If your product has passed the test. You will receive a confirmation email sent by GRL.

 

If you would like to list your product on VESA official webpage, there are two methods:

  1. Fill out the "Certified Product Website Posting Information" in the CDF. After the product has passed the certification test in GRL, it will be submitted to the association by GRL with the Pass report.
  2. After the product has been certified and received the Congratulation Letter Email from GRL, use this letter to reply to the association's contact person: moderator@vesa.org directly, indicating that the product needs to be listed on the association's website.

(If the above steps are not performed, the product will not be listed on the VESA official website)

 

DisplayPort Certification Test Items & Instruments Used

 

DisplayPort Certification Test Items

The product category can be certified by VESA and test items.

 test-items

DisplayPort Certification Test Equipment

Main Link Electrical test 

  • Keysight scope DSOV334A 33GHz
  • Tektronix BERTScope12500
  • Anritsu MP1900A

Aux Channel Electrical test

  • Keysight scope MSOS254A 2.5GHz

Link Layer test

  • Unigraf UCD-400
  • QuantumData 980

DC Power test 

  • Power Meter

Interoperability test

  • Certified DisplayPort Sink and Source

EDID test

  • Unigraf UCD-400

Multi-Stream Transport (MST) test

  • Four Dell U2417H
  • ST Micro Aux Monitor
  • Unigraf DPA-400

Billboard test

  • USB test tool: Command Verifier

DP+USB Crosstalk test

  • Keysight scope DSOV334A 33GHz
  • Anritsu MP1900A
  • Tektronix BERTScope12500 + GRL  USB-PD-C2

Power Delivery test

HDCP test

  • Unigraf UCD-400
  • QuantumData 980

 

 

USB Type-C® & USB-C® are trademarks of USB Implementers Forum.

DisplayPort & DP are trademarks of VESA

DisplayPort FAQ

Membership & Test Process Related Questions

1. VESA member inquiry and application?

You can go to the association website to check whether your Company Name is an association member. click here to check

Members can be OEM or Branding manufacturers, choose one.

If not, apply for the membership at https://vesa.org/join-vesamemberships/ (Online Application).

2. What is needed to use DP Logo?
  • Pass the test
  • Sign the VESA DisplayPort Trademark License Agreement

If your company’s products have passed the test, you need to sign a VESA DisplayPort Trademark License Agreement with VESA to use the DP Logo.

This document only needs to be signed once for each company, and there is no additional charge.

3. How to check VESA- certified products?

If your product has passed the test. You will only receive the Congratulation Letter email sent by GRL.

If you would like to list your product on VESA official webpage, there are two methods:

  1. Fill out the "Certified Product Website Posting Information" in the CDF. After the product has passed the certification test in GRL, it will be submitted to the association by GRL with the Pass report.
  2. After the product has been certified and received the Congratulation Letter Email from GRL, use this letter to reply to the association's contact person: moderator@vesa.org directly, indicating that the product needs to be listed on the association's website.
4. After the DisplayPort certification test is passed, can the test sample be returned?

After the sample is certified, it needs to be kept in the laboratory for 3 months and can be retrieved after 3 months.

5. How should the DisplayPort logo be used?

Refer to the logo notice published by VESA Association.click here to see guidelines

6. Does the Family Model need to be certified again?

The main certification model is if there is a Family Model, no additional testing is required. Please provide the Family Model application form to GRL before the certification, and we will help you submit it to the Association for review. <Download document>

Family Model Must Follow Below Conditions:

  • The extended model has no hardware changes (except for the case design/color change)
  • No software & firmware changes for extended models
  • No changes to the DisplayPort hardware design

Product Specifications & Preparations Related Questions

1. Which DisplayPort cables can be certified?

Passive cables can be certified, and there is no test specification for Active cables, and logos cannot be obtained. If you need to test, please contact GRL.

  • Passive cable: There is no IC in the cable
  • Active cable: There is a Retimer IC or Redriver IC in the cable

 

2. Which products belong to the DisplayPort Branch Device category and can be certified?
  • Monitor that supports MST
  • DP to Legacy Adapter (DVI/VGA/HDMI)
  • DP over USB Type-C® to Legacy Adapter (DVI/VGA/HDMI)
3. What is the Pin assignment requirement of DisplayPort?

The Pin assignment design of DisplayPort must follow: (Source and Sink must support Pin C & Pin E)

pin assignment

 

4. What is the difference between DisplayPort 2.0 and DisplayPort 1.4?

For DisplayPort transmission volume, encoding method, EQ and resolution are as follows:

dp2.1