feed a scalaz Process with recursive async function

Feed.scala

/**
My problem is: 

I have a function getData[A](params ...): Task[List[A]] that return asynchronously data
But this data is big so I cut the call in several step playing with params

In term of API, I want expose a function stream[A]: Process[Task, A]

I see Process.repeatEval & stream.async.unboundedQueue API from scalaz 
but I don't understand how to use it to produce this result
*/
object Feed[A] {
  // return a piece of needed data
  private def getData(start: Int, chunk: Int): Task[List[A]] = ???
  
  // the public API I want to expose
  def stream: Process[Task, A]
}

When the end of recursion is decide by getData result :

private def getChunks(start: Int, chunk: Int): Process[Task, ComplexResult] =
    Process.await(getData(start, start + chunk))({ c: ComplexResult =>
      val next = if (c.endOfData) Process.halt else getChunks(start + chunk, chunk)
      Process.emit(c) ++ next
    })

private def getChunks(start: Int, chunk: Int): Process[Task, ComplexResult] =
    Process.await(getData(start, start + chunk))({ c: ComplexResult =>
        val next = if (c.endOfData) Process.halt else getChunks(start + chunk, chunk)
        Process.emit(c) ++ next
    })