Why is the ringbuffered uart implementation feature gated on gpdma?

[Luctins]

Is there some major thing blocking the ringbuffered implementation from working with gpdma? Or is the current implementation specific to the uart itself, not handling using the generic dma channels?

I'm using the STM32H5 family, and the ringbuffered receiver would be perfect for my current requirements, as the BufferedUart seems to suffer from overruns at higher bit rates (>1Mbit).