Re: No more new fbdev drivers, please

From: Daniel Vetter
Date: Fri Sep 25 2015 - 14:41:24 EST

On Fri, Sep 25, 2015 at 04:09:46PM +0300, Tomi Valkeinen wrote:
> On 25/09/15 13:41, Kamil Lulko wrote:
> > Hi,
> >
> >> fbdev is (more or less) maintained, but it's a deprecated framework. All
> >> new Linux display drivers should be done on DRM.
> >
> > What about no-mmu platforms? DRM has a big fat MMU dependency in the
> > kconfig, is there a way to write DRM driver for such devices?
> I guess not.
> Then again, I don't see why DRM would have a hard dependency to MMU, if
> the work is done to make DRM work optionally without MMU. How much work
> that is, I have no idea.

We have plenty drivers in drm without hw mmu, and yeah there's probably no
reason at all why the drm subsystem has a hard depency on cpu MMUs. Might
be some #ifdef fallout that needs to be done, but there shouldn't be
anything fundamental. Maybe the old dri1 days code has something, but
that's all historical cruft anyway.
Daniel Vetter
Software Engineer, Intel Corporation
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