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Overview

SmartDV’s DisplayPort OUT Adapter IP is a fully featured USB4-to-DisplayPort de-tunneling solution purpose-built for SoC designs requiring seamless DisplayPort video output from USB Type-C connectors in docking stations, external monitors, hubs, and AR/VR display endpoints. Compliant with VESA DisplayPort Alt Mode 2.0 and USB4 v2.0, it sits at the display-facing egress point of a USB4 Router, reconstructing the tunneled DisplayPort video stream carried across the USB4 fabric back into a native DisplayPort signal and driving it out over a physical DP link to the connected monitor, enabling up to 80 Gbps of DisplayPort video bandwidth over a single USB-C connector.

Designed to give USB-C ecosystem SoC teams a production-ready display output endpoint, the IP implements DP OUT Adapter protocol de-mapping to reconstruct the native DisplayPort byte stream from tunneled USB4 packets, drives Main Link training on the physical DP link to the connected display, and reads back the display’s DisplayPort Configuration Data (DPCD) and EDID, forwarding that capability information upstream through the tunnel so the DisplayPort source can correctly negotiate resolution, refresh rate, and color depth. Support for multiple independent DP OUT Adapters within a single USB4 Router enables multi-monitor docking and hub designs, with full alignment to DisplayPort 2.1 UHBR10 and UHBR20 speeds matching USB4 Gen 2 and Gen 3 bit rates and encoding.

Built for design flexibility and silicon efficiency, the IP core is highly configurable for both ASIC and FPGA implementations, with a strong focus on area optimization, power management, and peak performance. Its parameterized tunnel architecture and clean host interface enable fast integration across a wide range of process nodes and target applications.

DisplayPort OUT Adapter
Key Features
  • Full USB4-to-DisplayPort De-Tunneling – Complete DP OUT Adapter protocol de-mapping, reconstructing native DisplayPort video streams from USB4 tunneled packets per DisplayPort Alt Mode 2.0 and USB4 v2.0
  • High-Bandwidth Display Output – Up to 80 Gbps DisplayPort video bandwidth driven to the connected display utilizing all four high-speed USB4 lanes
  • Multi-Monitor Support – Multiple independent DP OUT Adapters supported within a single USB4 Router, enabling multi-monitor docking, hub, and daisy-chain designs
  • DisplayPort 2.1 Speed Alignment – UHBR10 and UHBR20 DisplayPort speeds aligned with USB4 Gen 2 and Gen 3 bit rates and encoding for seamless de-tunneling
  • Physical Link Training – Drives DisplayPort Main Link training on the physical link to the connected display across Non-LTTPR, LTTPR Transparent, and LTTPR Non-Transparent modes
  • DPCD/EDID Readback – Reads the connected display’s DisplayPort Configuration Data (DPCD) and EDID and forwards it upstream through the tunnel for accurate source-side capability negotiation
  • Power Management Integration – Power management updates for seamless integration with USB4 power delivery and connection state management
Compliance and Compatibility
  • Compliant with VESA DisplayPort Alt Mode 2.0 specification
  • Compliant with USB4 v2.0 specification for full DisplayPort 2.1 tunneling support
  • Compatible with DisplayPort 2.1 UHBR speeds and legacy DisplayPort 1.4a rates
  • Supports Non-LTTPR, LTTPR Transparent, and LTTPR Non-Transparent link training modes per USB4 DP tunneling rules
  • Configurable SoC interface supporting AMBA AXI, AHB, APB, and custom wrappers for seamless integration
  • Compatible with ASIC and FPGA design flows across leading foundry process nodes
  • Compatible with all major EDA synthesis, simulation, and linting flows