Display, Imaging & Multimedia

DisplayPort 1.4 Link Controller

DisplayPort 1.4 link layer for the cockpit/infotainment display path — PHY-gated, compose-only deployment with ASIL-B config, AUX…

Request this IP →Browse the catalog

ASIL-B

target

91.07%

SPFM

86.49%

LFM

PASS

FMEDA

17.7K

gates

0.1.0

version

Interfaces at a glance

Block diagram

Place-and-route snapshot

Physical implementation

DisplayPort 1.4 Link Controller routed place-and-route layout on the Nangate45 PDK — A real synthesis and place-and-route pass on this RTL, routed on the open Nangate45 / FreePDK45 PDK — evidence the block closes physically, not just in simulation. Target-PDK timing, area, and power sign-off figures are shared under NDA.

The deliverable

What you’re licensing

DisplayPort 1.4 link layer for the cockpit/infotainment display path — PHY-gated, compose-only deployment with ASIL-B config, AUX… It is delivered as a licensable soft-IP block engineered as an ASIL-B Safety Element out of Context — not just RTL, but the complete functional-safety work package needed to carry it into an ISO 26262 program:

Synthesizable RTL

Portable, vendor-neutral SystemVerilog that drops onto your existing SoC fabric — no foundry or EDA-tool lock-in.

Per-IP FMEDA report

SPFM / LFM / PMHF computed against the ASIL target per ISO 26262-5 — the quantitative analysis your assessor asks for.

Safety manual

Assumptions of use, the safety mechanisms and their diagnostic coverage — written to drop straight into your safety case.

IP-XACT + integration docs

A machine-readable descriptor plus register and integration documentation for fast, low-risk bring-up.

Self-checking testbench

A self-checking testbench and a one-command build, so you can reproduce every claim on day one.

What it is

A synthesizable SystemVerilog DisplayPort 1.4 link-layer controller: AUX-channel DPCD transactions, main-link video packetisation (BS/TU_HDR/PIXEL/BE framing), and an LFSR-16 scrambler behind an APB4 register interface.

Key Features

DP 1.4 AUX channel: Manchester encode/decode at 1 MHz, native AUX DPCD read/write up to 8 bytes per transaction, NACK handling
Main-link video packetiser: BS/TU_HDR/PIXEL/BE framing state machine, configurable Transfer-Unit size (TU_SIZE), 1–4 lane support (LANES parameter)
LFSR-16 scrambler (x^16+x^5+x^4+x^3+1, reset 0xFFFF per DP §3.5.6.3), runtime bypass via CTRL.SCRAMBLE_EN
APB4 slave register file: 13 registers at 4-byte stride, plus HPD (Hot Plug Detect) synchroniser and interrupt (dp_irq_o)
ASIL-B config integrity: even-parity on CTRL/AUX_ADDR/INTR_EN (err_code 1)
ASIL-B AUX integrity: true wide-word SECDED (7 Hamming + 1 overall parity) on the 64-bit AUX DPCD read payload, single-bit correct / double-bit detect (err_code 2)
ASIL-B FSM integrity: diverse-DMR complementary-shadow lockstep on the AUX and main-link FSMs (err_code 9); pre-sign-off FMEDA SPFM 91.07%, LFM 86.49%, PMHF 2.98×10⁻⁸/h — PASS vs ASIL-B

Standards & Compliance

VESA DisplayPort 1.4 (link layer subset), AMBA APB4 (ARM IHI 0024); ISO 26262 ASIL-B SEooC (SPFM 91.07%, LFM 86.49%, PMHF 2.98×10⁻⁸/h, pre-sign-off)

Functional Safety

ASIL-B (SEooC) · SPFM 91.07% · LFM 86.49% · PASS

ISO 26262:2018 · FMEDA available · Safety Manual included

Register Map

Offset	Register	Description
`0x00`	CTRL	RW [EN, LANES[1:0], LINK_RATE[2:0], SCRAMBLE_EN, RESET]
`0x04`	STATUS	RO [LINK_UP, AUX_BUSY, FIFO_EMPTY, HPD]
`0x08`	INTR	W1C [HPD_PULSE, AUX_DONE, AUX_NACK, LINK_DOWN]
`0x0C`	INTR_EN	RW same
`0x10`	AUX_ADDR	RW [19:0]

…7 more registers — see datasheet for the full table.

Getting Started

// Minimal instantiation
dp_link #(
 .ADDR_W(6)
) u_dp_link (
 .clk (clk),
 .rst_n (rst_n),
 // APB4
 .p_paddr (paddr),
 .p_psel (psel),
 .p_penable (penable),
 .p_pwrite (pwrite),
 .p_pwdata (pwdata),
 .p_prdata (prdata),
 .p_pready (pready),
 // Safety
 .err_clear (1'b0),
 .err_valid (err_valid),
 .err_code (err_code)
);

Configure via the CTRL register after reset to enable the IP and set operating parameters. Monitor err_valid / err_code for any safety faults reported by the built-in safety monitor.

Applications

Where it fits

Typically deployed in instrument clusters, camera pipelines, and safety-monitored display paths.

The case

Why license it, not build it

Skip 12–18 months

The FMEDA and the safety case are already generated. You integrate a finished safety element — you don’t stand up a safety-IP program to originate one.

One vendor, one safety story

Every block in the catalog shares the same safety architecture, fault-reaction model, and FMEDA methodology — so subsystems roll up cleanly.

Verified, not vapor

The RTL builds and passes today; the safety metrics come from analysis and fault injection against real RTL, not a datasheet promise.

Interested in DisplayPort 1.4 Link Controller?

Pricing, the per-IP FMEDA, safety manual, and RTL data room are shared under a mutual NDA.

Talk to us →See related IP

Figures are pre-silicon engineering-grade estimates for a Safety Element out of Context (SEooC); final ASIL sign-off is the integrator’s, supported under NDA. FMEDA and Safety Manual available under NDA.

circuit-design.space · +1-971-357-1400 · anovickis@circuit-design.space