DisplayPort Intel® Cyclone 10 GX FPGA IP Design Example User Guide

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ID 683603
Date 9/02/2022
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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. DisplayPort Intel® Cyclone® 10 GX FPGA IP Design Example User Guide Archives 4. Revision History for DisplayPort Intel® Cyclone® 10 GX 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® Cyclone® 10 GX DisplayPort SST Parallel Loopback Design Features 2.2. Intel® Cyclone® 10 GX DisplayPort MST Parallel Loopback Design Features 2.3. Intel® Cyclone® 10 GX DisplayPort SST TX-only or RX-only Design Features 2.4. Enabling Adaptive Sync Support 2.5. Design Components 2.6. Clocking Scheme 2.7. Interface Signals and Parameter 2.8. Hardware Setup 2.9. Simulation Testbench 2.10. DisplayPort Transceiver Reconfiguration Flow 2.11. Transceiver Lane Configurations
2.3. Intel® Cyclone® 10 GX DisplayPort SST TX-only or RX-only Design Features x
2.3.1. Intel® Cyclone® 10 GX DisplayPort SST TX-only Design Features 2.3.2. Intel® Cyclone® 10 GX DisplayPort SST RX-only Design Features
1. DisplayPort Intel® FPGA IP Design Example Quick Start Guide
2. Parallel Loopback Design Examples
3. DisplayPort Intel® Cyclone® 10 GX FPGA IP Design Example User Guide Archives
4. Revision History for DisplayPort Intel® Cyclone® 10 GX FPGA IP Design Example User Guide

2.4. Enabling Adaptive Sync Support

To enable support for the Adaptive Sync feature in the design examples without PCR, you need to edit the MSA_TIMING_PAR_IGNORED bit of the DPCD 00007h register and the MSA_TIMING_PAR_IGNORE_EN bit of the DPCD 00107h register in the rx_utils.c file in the software folder.
Note: The Adaptive Sync feature is applicable only when you turn on the Enable GPU control parameter.
To edit the bits:
  1. Locate data[7] = 0x80; // DPCD_ADDR_DOWN_STREAM_PORT_COUNT.
  2. Change 0x80 to 0xC0.
  3. Locate data[7] = 0x00; // DPCD_ADDR_DOWNSPREAD_CTRL
  4. Change 0x00 to 0x80.
  5. Regenerate the ELF file, refer to Regenerating ELF File.
  6. After programming the SOF file into the FPGA, program the updated ELF file into the FPGA.
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