MIPI DSI Interface

The Radxa ROCK 4D features one onboard MIPI DSI interface for connecting displays, supporting resolutions up to 2K.

Supported Displays

List of displays tested and confirmed working with ROCK 4D:

Model	Resolution
Radxa Display 8 HD	800×1280

User Guide

To connect a display using the MIPI DSI interface, the ROCK 4D requires a dedicated FPC cable (FPC cable specification: 39-pin 0.3mm SBC to 40-pin 0.5mm Display).

• Cable Connection Guide

①. Connect to the ROCK 4D's MIPI DSI interface with the gold fingers (metal contacts) facing toward the mainboard.

②. Connect to the display's interface with the gold fingers (metal contacts) facing toward the display.

Enabling the Display

1. Open a terminal and enter the rsetup command to configure display options:

radxa@radxa-4d$

rsetup

2. Use the arrow keys to select the Overlays option, then press Enter.

3. Select Manage overlays and press Enter.

4. Use the arrow keys to select Enable Radxa Display 8 HD, press Space to check the option, then press Enter to confirm.

tip

An asterisk * in the checkbox indicates the option is enabled.

5. Reboot the system for the changes to take effect. The display should now work properly.

Interface Specifications

tip

For detailed interface specifications, please refer to the Hardware Design: Schematics in the download section.

Pin#	Name	Pin#	Name	Pin#	Name
1	LCD_3V3	15	GND	29	GND
2	LCD_3V3/VCC_1V8_S0	16	MIPI_DPHY_DSI_TX_D2N	30	LCD_3V3
3	NC	17	MIPI_DPHY_DSI_TX_D2P	31	LCD_3V3
4	LCD_RESET_1	18	GND	32	GND
5	NC	19	MIPI_DPHY_DSI_TX_D3N	33	GND
6	GND	20	MIPI_DPHY_DSI_TX_D3P	34	VCC_LEDK2
7	MIPI_DPHY_DSI_TX_D0N	21	GND	35	VCC_LEDK2
8	MIPI_DPHY_DSI_TX_D0P	22	GND	36	NC
9	GND	23	TP_RST_LCD	37	NC
10	MIPI_DPHY_DSI_TX_D1N	24	VCC_TP	38	VCC_LEDA2
11	MIPI_DPHY_DSI_TX_D1P	25	TP_INT_LCD	39	VCC_LEDA2
12	GND	26	TP_SDA_LCD	40	GND
13	MIPI_DPHY_DSI_TX_CLKN	27	TP_SCL_LCD	41	GND
14	MIPI_DPHY_DSI_TX_CLKP	28	GND