Hi Werner,
Thanks for the patch - I now have a successful GDB connection over UART on TGL.
I was not sure whether to include the GDB functions to every stage or exclude them from the boot block - now I have the answer. I'd like to provide a fix in a form of the patch but the paperwork on my side is still not complete to allow me to upstream the code so I guess I'll leave the opportunity to you or the others.
Regards, Jan