Compute Module • Help me power my 21.5 inch LCD using 4 lanes.

Hello.

I'm trying to drive a 1920x1080 resolution LCD using the CM4S.

Signal Flow
SM4S (DSI) => SN65DSI84 (LVDS) => 21.5-inch AUO LCD.

There are many posts on the forum saying that 4-lane output isn't possible with the CM4S.

Previously, when we were running a 37-inch LCD (1920x540) with 4 lanes, we had to use 2-lane DSI.

We still can't get the LCD to run with 4 lanes.

Is there a way to run a 21.5-inch LCD with 4 DSI lanes?

Statistics: Posted by ParkJungkyu — Mon Dec 29, 2025 7:35 am — Replies 1 — Views 53

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