New DRM model

[Nicolas Souchu]

On Mon, Feb 09, 2004 at 01:32:52PM -0800, Jon Smirl wrote:
> --- Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> > On Tue, 2004-02-10 at 07:01, Jon Smirl wrote:
> > > I have a new version of DRM at bk://mesa3d.bkbits.net/drm 
> > > In it's current form it's 2.6 kernel only. Some support is generic but I've
> > > mainly be working on an R200. It is still under development with lots of
> > work to
> > > do.
> > 
> > Nice, but I still need a equivalent of radeonfb for mode setting, which
> > has to be in the kernel. And fbcon should survive for a while, at least
> > until there's replacement. Ideally, the new model shouldn't enforce which
> > of fbcon or userland console one uses.
> 
> Why does general purpose mode setting need to be in the kernel? It's a 100K of

To enable fallback to kernel debugger when your user app crashes. Also, to enable different
apps to share safely the graphic resources.

> code. We're only talking about about the few seconds between power-on and early
> user space starting. After we get early user-space I use it to run the mode code
> in user space.

Debugging early boot becomes quite impossible?

> Note that the new model only applies to DRM devices. Everthing else would
> continue with the old code.

What is exactly a DRM device?

-- 
Nicholas Souchu - nsouch@free.fr - nsouch@FreeBSD.org