F-Tile DisplayPort IP Design Example User Guide

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ID 709308
Date 12/01/2025
Public
Document Table of Contents
Document Table of Contents x
1. DisplayPort IP Design Example Quick Start Guide 2. DisplayPort IP Design Examples 3. Display Stream Compression (DSC) Support 4. HDCP Over DisplayPort Design Example 5. Document Revision History for F-Tile DisplayPort IP Design Example User Guide
1. DisplayPort IP Design Example Quick Start Guide x
1.1. Directory Structure 1.2. Hardware and Software Requirements 1.3. Generating the Design 1.4. Simulating the Design 1.5. Compiling and Testing the Design 1.6. DisplayPort IP Design Example Parameters
1.5. Compiling and Testing the Design x
1.5.1. Regenerating ELF File
2. DisplayPort IP Design Examples x
2.1. Agilex™ 7 F-Tile DisplayPort SST Parallel Loopback Design Features 2.2. Agilex™ 7 F-Tile DisplayPort SST TX-only Design Features 2.3. Agilex™ 7 F-Tile DisplayPort SST RX-only Design Features 2.4. Design Components 2.5. Clocking Scheme 2.6. Interface Signals and Parameters 2.7. Simulation Testbench
4. HDCP Over DisplayPort Design Example x
4.1. High-bandwidth Digital Content Protection (HDCP) 4.2. HDCP Over DisplayPort Design Example Architecture 4.3. Nios® V Processor Software Flow 4.4. Design Walkthrough 4.5. Protection of Encryption Key Embedded in FPGA Design 4.6. Debug Guidelines
4.4. Design Walkthrough x
4.4.1. Setting Up the Hardware 4.4.2. Generating the Design 4.4.3. Including HDCP Production Keys 4.4.4. Compiling the Design 4.4.5. Viewing the Results
4.4.3. Including HDCP Production Keys x
4.4.3.1. Storing Plain HDCP Production Keys in the FPGA (Support HDCP Key Management = 0) 4.4.3.2. Storing Encrypted HDCP Production Keys in the External Flash Memory or EEPROM (Support HDCP Key Management = 1)
4.4.3.1. Storing Plain HDCP Production Keys in the FPGA (Support HDCP Key Management = 0) x
4.4.3.1.1. HDCP Key Mapping from DCP Key Files 4.4.3.1.2. hdcp1x_tx_kmem.v and hdcp1x_rx_kmem.v files 4.4.3.1.3. hdcp2x_rx_kmem.v file 4.4.3.1.4. hdcp2x_tx_kmem.v file
4.4.3.2. Storing Encrypted HDCP Production Keys in the External Flash Memory or EEPROM (Support HDCP Key Management = 1) x
4.4.3.2.1. Altera® KEYENC 4.4.3.2.2. Key Programmer
4.5. Protection of Encryption Key Embedded in FPGA Design x
4.5.1. Security Considerations
4.6. Debug Guidelines x
4.6.1. HDCP Status Signals 4.6.2. Modifying HDCP Software Parameters 4.6.3. Frequently Asked Questions (FAQ)
1. DisplayPort IP Design Example Quick Start Guide
2. DisplayPort IP Design Examples
3. Display Stream Compression (DSC) Support
4. HDCP Over DisplayPort Design Example
5. Document Revision History for F-Tile DisplayPort IP Design Example User Guide

4.6.1. HDCP Status Signals

There are several signals that are useful to identify the working condition of the HDCP IP cores. These signals are available at the design example top-level:

Table 22.  Signal Name
Signal Name

Function
rx_hdcp1_enabled

RX HDCP1x IP Decryption Status

0: Inactive

1: Active
rx_hdcp2_enabled

RX HDCP2x IP Decryption Status

0: Inactive

1: Active
tx_hdcp1_enabled

TX HDCP1x IP Encryption Status

0: Inactive

1: Active
tx_hdcp2_enabled

TX HDCP2x IP Encryption Status

0: Inactive

1: Active

Refer to for their respective LED placements.

The active state of these signals indicates that the HDCP IP is authenticated and receiving/sending encrypted video stream. For each direction, only HDCP1x or HDCP2x encryption/decryption status signals is active. For example, if either rx_hdcp1_enabled or rx_hdcp2_enabled is active, the HDCP on the RX side is enabled and decrypting the encrypted video stream from the upstream video source.

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