HI Daniel
You can disable the console output and debug parameters for Kernel, which will reduce the boot time and the linux splash screen is shown faster than in regular boot process.
The issue with U-Boot splash screen is first of all, it will be limited to one specific interface and there will be flickering when frame-buffer is switched from U-Boot to Linux Kernel. The issue with flickering maybe solved but also this would be a special case and might work only for one specific interface.
Toradex tries to provide general solutions which might fit most of the customers. That’s why we think not enabling the graphics in U-Boot is the way, we should go.
However since U-Boot is OpenSource, you may customize it for your use-case and enable graphics in U-Boot for iMX8X.
Best regards,
Jaski