Troubleshooting HDMI Connection Issues on STM32MP157F-DK2 and Toradex Verdin iMX8M Plus Boards with Embedded Wizard

Question

Introduction

I am experiencing issues with HDMI connections on my STM32MP157F-DK2 and Toradex Verdin iMX8M Plus development boards while implementing Embedded Wizard. Below are the details of the problems and my current setup.

Setup

• Development Boards:
  • STM32MP157F-DK2
  • Toradex Verdin iMX8M Plus
• Software: Embedded Wizard
• Display Output: HDMI

Issues

1. STM32MP157F-DK2:
   • No screen output via HDMI.
2. Toradex Verdin iMX8M Plus:
   • Display is partially working but the screen is unclear and improperly rendered.

Troubleshooting Steps Taken

• Verified HDMI cables and monitors are functional.
• Attempted to adjust HDMI settings within Embedded Wizard.
• On the iMX8M Plus board, switched display formats (RGBA8888 to RGB565) but encountered a compilation error stating RGB565 was not found in the package.

Request for Assistance

• Are there any specific HDMI configurations or settings required for these boards when using Embedded Wizard?
• Has anyone successfully implemented Embedded Wizard on these boards with HDMI output? If so, could you share your configuration and settings?
• Any other troubleshooting tips or insights would be greatly appreciated.

Thank you for your help!

Answer 1

Hello Medex RnD,

which kind of Embedded Wizard BuildEnvironment are you using?
STM32MP1-OpenGL-Wayland or STM32MP1-OpenGL-DRM?

In case of STM32MP1-OpenGL-Wayland, HDMI output has to be configured in /etc/xdg/weston/weston.ini among other things.
In case of STM32MP1-OpenGL-DRM, you can set a preferred display type in ewconfig.h (EW_DISPLAY_PREFERRED_DRM_CONNECTOR_TYPE). On default, the onboard DSI display is set as preferred display.

Color format RGB565 is not supported on OpenGL platforms. Could you please describe in more detail what is meant by 'screen is unclear and improperly rendered' (e. g. some pictures or a video)?

In case of Toradex Verdin iMX8M maybe the device tree has to be modified to get HDMI output. Please refer to Device Tree Overlays on Torizon.

Regards,
Martin