WSAL24783 – 4.3inch DSI QLED/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

Brief overview of installing and configuring the 4.3inch QLED display with DSI interface on a Raspberry Pi.

Related products at JW Tech

WSAL24783 – 4.3inch QLED Display, DSI Interface, 800 × 480, Integrated Structure, Toughened Glass Panel

Technical overview

Resolution: 800 x 480 pixels; capacitive touch panel supporting 5-point touch; toughened glass rated up to 6H hardness.
Supported boards: Raspberry Pi 5, CM4, CM3+, CM3, Pi 4B, 3B+, 3A+, 3B, 2B, B+, A+.
Connection for older Pi models (up to 4B/CM4): use an FFC cable to the 15-PIN DSI port.
Connection for newer boards (Pi 5/CM4/CM3+/CM3): use a DSI-Cable-12cm cable to the 22-PIN DSI1 port.
Software setup via official image: add dtoverlay=vc4-kms-v3d for older systems; for Pi 5/CM4 it is recommended to update to the latest system version after flashing and reboot.
Backlight control via terminal: echo X | sudo tee /sys/class/backlight/*/brightness, where X ranges from 0 to 255.
Display rotation: via GUI in Trixie/Bookworm; in Lite versions via video=DSI-1:800x480M@60,rotate=90 in /boot/cmdline.txt.
Touch rotation: in Bookworm via a udev rule (99-waveshare-touch.rules); in Bullseye/Buster via an Xorg setting (CalibrationMatrix).

Commands and examples – verify before use:

dtoverlay=vc4-kms-v3d
dtoverlay=vc4-kms-dsi-7inch
dtoverlay=vc4-kms-dsi-7inch,dsi0
sudo apt-get update
sudo apt-get full-upgrade -y
sudo reboot
echo 100 | sudo tee /sys/class/backlight/*/brightness
video=DSI-1:800x480M@60,rotate=90
display_rotate=1
ENV{ID_INPUT_TOUCHSCREEN}=="1", ENV{LIBINPUT_CALIBRATION_MATRIX}="0 -1 1 1 0 0"
Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"

Notes and version constraints

The exact DSI interface (DSI0 or DSI1) depends on the board; for Pi 5/CM4, DSI1 is default while DSI0 is only available on certain models.
Specific rotation and touch settings are OS-dependent (Trixie, Bookworm, Bullseye, Buster, Stretch/Jessie). Verify your Linux version before running commands.
Updating to the latest system version requires a network connection.
The exact location of the large capacitors for troubleshooting must be confirmed using the visual material.
Some steps require manual confirmation by a technician.

Source and revision record

4.3inch DSI QLED - Waveshare Wiki
Source revision: 110234
Captured: 2026-09-05T02:56:38+00:00
SHA-256: e9ed38bc4793e0df8f6e3b7667e38a77f116599b8cb31bb7111f520e82270fc0