DisplayPort Intel® Arria 10 FPGA IP Design Example User Guide

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ID 683050
Date 11/12/2021
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Document Table of Contents
Document Table of Contents x
1. DisplayPort Intel® FPGA IP Design Example Quick Start Guide 2. Parallel Loopback Design Examples 3. HDCP Over DisplayPort Design Example for Intel® Arria® 10 Devices 4. DisplayPort Intel® Arria® 10 FPGA IP Design Example User Guide Archives 5. Revision History for DisplayPort Intel® Arria® 10 FPGA IP Design Example User Guide
1. DisplayPort Intel® FPGA 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 Intel® FPGA IP Design Example Parameters
1.5. Compiling and Testing the Design x
1.5.1. Regenerating ELF File
2. Parallel Loopback Design Examples x
2.1. Intel® Arria® 10 DisplayPort SST Parallel Loopback Design Features 2.2. Intel® Arria® 10 DisplayPort MST Parallel Loopback Design Features 2.3. Enabling Adaptive Sync Support 2.4. Creating RX-Only or TX-Only Designs 2.5. Design Components 2.6. Clocking Scheme 2.7. Interface Signals and Parameters 2.8. Hardware Setup 2.9. Simulation Testbench 2.10. DisplayPort Transceiver Reconfiguration Flow 2.11. Transceiver Lane Configurations
3. HDCP Over DisplayPort Design Example for Intel® Arria® 10 Devices x
3.1. High-bandwidth Digital Content Protection (HDCP) 3.2. HDCP Over DisplayPort Design Example Architecture 3.3. Nios II Processor Software Flow 3.4. Design Walkthrough 3.5. Protection of Encryption Key Embedded in FPGA Design 3.6. Debug Guidelines
3.4. Design Walkthrough x
3.4.1. Set Up the Hardware 3.4.2. Generate the Design 3.4.3. Include HDCP Production Keys 3.4.4. Compile the Design 3.4.5. View the Results
3.4.3. Include HDCP Production Keys x
3.4.3.1. Store plain HDCP production keys in the FPGA (Support HDCP Key Management = 0) 3.4.3.2. Store encrypted HDCP production keys in the external flash memory or EEPROM (Support HDCP Key Management = 1)
3.4.3.1. Store plain HDCP production keys in the FPGA (Support HDCP Key Management = 0) x
3.4.3.1.1. HDCP Key Mapping from DCP Key Files 3.4.3.1.2. hdcp1x_tx_kmem.v and hdcp1x_rx_kmem.v files 3.4.3.1.3. hdcp2x_rx_kmem.v file 3.4.3.1.4. hdcp2x_tx_kmem.v file
3.4.3.2. Store encrypted HDCP production keys in the external flash memory or EEPROM (Support HDCP Key Management = 1) x
3.4.3.2.1. Intel KEYENC 3.4.3.2.2. Key Programmer
3.4.5. View the Results x
3.4.5.1. LED Functions
3.5. Protection of Encryption Key Embedded in FPGA Design x
3.5.1. Security Considerations
3.6. Debug Guidelines x
3.6.1. HDCP Status Signals 3.6.2. Modifying HDCP Software Parameters 3.6.3. Frequently Asked Questions (FAQ)
1. DisplayPort Intel® FPGA IP Design Example Quick Start Guide
2. Parallel Loopback Design Examples
3. HDCP Over DisplayPort Design Example for Intel® Arria® 10 Devices
4. DisplayPort Intel® Arria® 10 FPGA IP Design Example User Guide Archives
5. Revision History for DisplayPort Intel® Arria® 10 FPGA IP Design Example User Guide

2.1. Intel® Arria® 10 DisplayPort SST Parallel Loopback Design Features

The SST parallel loopback design examples demonstrate the transmission of a single video stream from DisplayPort sink to DisplayPort source with or without Pixel Clock Recovery (PCR).
Figure 5.  Intel® Arria® 10 DisplayPort SST Parallel Loopback with PCR
  • In this variant, the DisplayPort source’s parameter, TX_SUPPORT_IM_ENABLE, is turned off and the standard VSYNC/HSYNC/DE video interface is used.
  • The DisplayPort sink receives video and or audio streaming from external video source such as GPU and decodes it into parallel video interface.
  • The IOPLL drives the video clock at a fixed frequency (in this case, 160 MHz).
  • If DisplayPort sink’s MAX_LINK_RATE is configured to HBR2 and PIXELS_PER_CLOCK is configured to Dual, the video clock runs at 300 MHz to support 4Kp60 pixel rate (594/2 = 297 MHz). Otherwise, the video clock runs at 160 MHz.
  • The design uses the pixel recovery clock (PCR) to recover the pixel clock according to the received MSA information from the sink and converts the RX parallel video interface to the standard VSYNC/HSYNC/DE interface.
  • The PCR output drives the source video interface and encodes to the DisplayPort main link before transmitting to the monitor.
  • The recovered clock drives the TX video clock.
Figure 6.  Intel® Arria® 10 DisplayPort SST Parallel Loopback without PCR
  • In this variant, the DisplayPort source’s parameter, TX_SUPPORT_IM_ENABLE, is turned on (“1”) and the video image interface is used.
  • The DisplayPort sink receives video and or audio streaming from external video source such as GPU and decodes it into parallel video interface.
  • The DisplayPort sink video output directly drives the DisplayPort source video interface and encodes to the DisplayPort main link before transmitting to the monitor.
  • The IOPLL drives both the DisplayPort sink and source video clocks at a fixed frequency.
  • If DisplayPort sink and source's MAX_LINK_RATE parameter is configured to HBR2 and PIXELS_PER_CLOCK is configured to Dual, the video clock runs at 300 MHz to support 4Kp60 pixel rate (594/2 = 297 MHz). Otherwise, the video clock runs at 160 MHz.
Table 8.  Design Example Variant Comparison
Design Example PCR Module Enable Video Image Interface Adaptive Sync Video Interface
DisplayPort SST parallel loopback with PCR Required No Not supported Standard VSYNC/HSYNC/DE interface (txN_video_in)
DisplayPort SST parallel loopback without PCR Not required Yes Supported Video Image Interface (txN_video_in_im)
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