Re: No more new fbdev drivers, please
From: Gerd Hoffmann
Date: Tue Sep 29 2015 - 04:24:18 EST
On Mo, 2015-09-28 at 14:36 +0200, Daniel Vetter wrote:
> On Mon, Sep 28, 2015 at 09:39:13AM +0200, Gerd Hoffmann wrote:
> > Hi,
> > > As Daniel mentioned, the connector+encoder+crtc combination is one of
> > > those simplifications that would make sense if more such drivers are
> > > added.
> > Another one is memory management. It's pretty complex because it can
> > handle _way_ more than what simple drivers need, and the result is
> > _alot_ of ttm boilerplate in the drivers.
> ttm is pretty impressive overkill for most simplistic drm drivers. If you
> just need contiguous framebuffers for display then the cma helpers should
> take care of pretty much all the boilerplate for you. They have ready-made
> simple gem and dumb framebuffer mmap support, which is all a basic kms
> driver needs.
Does that work on !arm meanwhile? Last time I checked (when writing
bochsdrm, around v3.14) the cma helpers didn't even build on x86 ...
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