Flycast and new GDI CHD format

Is there an estimate when the new gap type format will be implemented in Flycast master/libretro branch ?

As some of you may know, chdman from MAME 0.290 and onwards will change for GDI to CHD conversions. As of now, only the development branch support CHDs created with latest chdman (from git and 0.290+).

it will have to be supported by libchd first