Altyn-Depe, Proto Dravdian?

I'm not sure if Proto-Dravidians were living that far high, but there's a theory that the ancient Elamites were the same stock as those Dravidian speakers based on language connection, the Elamites lived in southwest Persia, the Dravidians were perhaps the original population of the Indus Valley Civilization (Harappan culture), possibly a very old movement out of the middle east during the Neolithic times brought these ancient farmers to this part of the world which eventually created the Indus and Elamite civilizations.

The Indo-Iranian speakers arrived from the north later and mixed in with these people, the Dravidian speakers were probably pushed down to India further south because of these people, but that's not proven yet, what is proven is that the original Dravidian speakers (Who are the majority in South India today) were of dark Caucasian stock who later mixed with Australoid aboriginal of India.

Btw, not that wiki is reliable but I think you misread that, it's probably saying that the late Harrapan culture is identified as Proto-Dravidian.