Noralf Trønnes <noralf@tronnes.org> writes:

> Add a common drm_driver.dumb_map_offset function for GEM backed drivers.
>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Instead of just introducing the new code, could we replace CMA's code
with calls to this at the same time?

I suspect that if we had CMA subclass from drm_fb_gem (or we move the
gem objects to the base class), we could remove a lot of its code that
you're copying in patch 2, as well.