Olimex has released a compact MIPI DSI to HDMI adapter board that adds 1080p60 video output to ESP32-P4 development boards. The MIPI-HDMI adapter uses the Lontium Semiconductors LT8912B bridge chip to convert MIPI DSI signals to HDMI 1.4, supporting one to four data lanes with speeds from 80 Mbps to 1.5 Gbps per lane. At just 6 cm x 2.4 cm (2.4 x 0.9 inches), the board connects via a 15-pin FPC cable and works plug-and-play without custom firmware.
The adapter targets applications like digital signage, kiosk systems, HMI displays, and portable multimedia devices. It shares similarities with the ESP-HDMI-Bridge accessory for Espressif's ESP32-P4-Function-EV-Board, both enabling ESP32-P4 boards to drive external HDMI monitors for dashboards or streaming. Design files including KiCad schematics are available on Olimex's GitHub.
Compatibility varies across ESP32-P4 boards due to differing DSI connector pinouts. Boards from Waveshare, DFRobot, and Olimex follow the same MIPI pinout as Espressif's reference design and should work directly. However, boards like the GUITION JC-ESP32P4-M3-DEV and ESP32-P4-MINI have flipped data and clock pins, requiring an adapter. The pinout also appears compatible with Raspberry Pi 1 through 4 boards.
The MIPI-HDMI adapter is available from the Olimex store for $17 (€15), with the required 15-pin MIPI FPC cable sold separately.
