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WSAL22028 – 2.8inch DSI LCD/en

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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

The 2.8inch DSI LCD (WSAL22028) is a capacitive touch display with an IPS panel, 480×640 resolution and optical bonding. It is driven directly by the Raspberry Pi via the DSI interface and supports Bookworm, Bullseye and Buster systems across several Pi models.

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Technical overview

  • Resolution: 480×640 pixels; display technology: IPS; touch: five-point capacitive touch system
  • Optical bonding process improves panel image quality
  • Touch surface made of toughened glass with hardness up to 6H
  • Supported boards: Pi5/CM5, 4B/CM4, 3B+/3A+, 3B, CM3+/CM3
  • Connection via DSI interface; newer models offer two MIPI DSI ports – default recommendation: DSI1
  • Maximum refresh rate: 60 Hz
  • Software control of backlight brightness is supported
  • Supported operating systems: Bookworm, Bullseye, Buster

Commands and examples – verify before use:  

dtoverlay=vc4-kms-v3d
dtoverlay=vc4-kms-dsi-waveshare-panel,2_8_inch
sudo bash ./WS_xinchDSI_MAIN.sh 28 I2C0
dtoverlay=WS_xinchDSI_Screen,SCREEN_type=0,I2C_bus=10
dtoverlay=WS_xinchDSI_Touch,invertedy,swappedxy,I2C_bus=10
wlr-randr --output DSI-2 --off
wlr-randr --output DSI-2 --on
xset dpms force off
disable_touchscreen=1

Notes and version constraints

  • On Pi5/CM5/CM4/CM3+/CM3 there are two MIPI DSI interfaces; it must be ensured that the correct interface and matching dtoverlay commands are used – the default recommendation is DSI1
  • The configuration files mentioned in the source (config.txt, cmdline.txt) reside in the root directory of the TF card or under /boot/; changes only take effect after reboot
  • The wlr-randr command applies only to Labwc/Wayfire graphical interfaces; xset dpms force off only to X11
  • For Buster systems, a system update may overwrite previously installed driver files; the DSI driver then has to be reinstalled
  • When changing the board (e.g., from Pi4 to Pi3), the drivers must be reconfigured for the new board
  • Synchronous rotation of display and touch is only supported on Trixie/Bookworm; on Bullseye/Buster the touch rotation must be set manually and separately
  • All steps listed assume a working internet connection (e.g., for the manual driver installation path)
  • No information on price, availability, warranty or certifications is present in the source; these values were deliberately not included

Source and revision record

  • 2.8inch DSI LCD - Waveshare Wiki
  • Source revision: 110978
  • Captured: 2026-09-03T03:35:50+00:00
  • SHA-256: cfa612a273cb7e3ccb09e51aa7a7c93ed71c6859bc5b716e80c3b1b351cf4b9f
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