what is the blank lines in DRQ Table?
can i use it for other purpose?

example: gpio for dma, i want to connect AD9226 and orangepi 3 lts with gpio, dma is necessary, but i don't know how to use it!

I am very impressed with your writing I couldn't think of this, but it's amazing! I wrote several posts similar to this one, but please come and see!  slotsite