[RFC 4/4] drm: Add NVIDIA Tegra support

[Thierry Reding]

* Marek Szyprowski wrote:
[...]
> We already have dma_map_page() and dma_map_single() which are very similar. 
> Maybe adding dma_map_pages() won't be such a bad idea? 
> 
> If not maybe we should provide some kind of helper functions which converts 
> page array to scatterlist and then maps them.

drm_prime_pages_to_sg() seems to do exactly that.

Thierry
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