According to reports on reputable media Trump will make a working visit to the UK in the New Year, which will be part of his proposed tour of European capitals. There will be no pomp or processions, nor staying at the Palace, no address to parliament. It will be strictly business.
This is in line with protocol for previous presidents. If he makes it to a second term he may get his State Visit towards the end of that term. It is a way of saying thank you to our closest ally. Let us hope there is something to thank him for.