I am not sure what you mean by "patterns are not HDR encoded", do you mean they do not go through madVR's HDR -> SDR conversion path? How would madTPG know HCFR was sending patches it should treat as HDR? I don't think madTPG looks for flags from software telling it HDR metadata, I don't think there are any standards around metadata attached to test patches so it would have to be something worked out between HCFR (Argyllcms) and madVR.
An option in madTPG to set the input HDR metadata, similar to how we can set the output metadata, would be cool.
