F-Tile DisplayPort Intel® FPGA IP Design Example User Guide

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ID 709308
Date 11/03/2023
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Document Table of Contents
Document Table of Contents x
1. DisplayPort Intel® FPGA IP Design Example Quick Start Guide 2. DisplayPort Intel® FPGA IP Design Examples 3. HDCP Over DisplayPort Design Example 4. Document Revision History for F-Tile DisplayPort Intel® 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. DisplayPort Intel® FPGA IP Design Examples x
2.1. Intel Agilex® 7 F-Tile DisplayPort SST Parallel Loopback Design Features 2.2. Intel Agilex® 7 F-Tile DisplayPort SST TX-only Design Features 2.3. Intel 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
3. HDCP Over DisplayPort Design Example 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. DisplayPort Intel® FPGA IP Design Examples
3. HDCP Over DisplayPort Design Example
4. Document Revision History for F-Tile DisplayPort Intel® FPGA IP Design Example User Guide

2.5. Clocking Scheme

The clocking scheme illustrates the clock domains in the DisplayPort Intel® FPGA IP design example.

Figure 10.  Intel Agilex® 7 F-Tile DisplayPort Transceiver clocking scheme
Table 8.  Clocking Scheme Signals
Clock in diagram Description
SysPLL refclk

F-Tile System PLL reference clock which can be any clock frequency that is dividable by System PLL for that output frequency.

In this design example, system_pll_clk_link and rx/tx refclk_link share the same 150 MHz SysPLL refclk.

It must be a free running clock which is connected from a dedicated transceiver reference clock pin to the input clock port of Reference and System PLL Clocks IP, before connecting the corresponding output port to DisplayPort Phy Top.
Note: For this design example, configure Clock Controller GUI Si5391A OUT6 to 150 MHz.
system_pll_clk_link

The minimum System PLL output frequency to support all DisplayPort rates is 320 MHz.

This design example uses a 900 MHz (highest) output frequency so that SysPLL refclk can be shared with rx/tx refclk_link, which is 150 MHz.

rx_cdr_refclk_link /

tx_pll_refclk_link 		Rx CDR and Tx PLL Link refclk which is fixed to 150 MHz to support all DisplayPort data rates.

rx_ls_clkout /

tx_ls_clkout

DisplayPort Link Speed Clock to clock DisplayPort IP core. The frequency is equivalent to Data Rate divided by parallel data width.

Example:

Frequency = data rate / data width

For HBR3:

= 8.1G (HBR3) / 40 bits

= 202.5 MHz

For UHBR10:

= 10G (UHBR10) / 32 bits

= 312.5 MHz

Note: For UHBR, DisplayPort Parallel width is in 32 bits
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