[ubuntu-x] Nouveau information and proposed plan

[Christopher James Halse Rogers]

On Tue, 2009-12-08 at 09:28 -0800, Luis R. Rodriguez wrote:
> On Mon, Dec 7, 2009 at 4:07 PM, Christopher James Halse Rogers
> <raof at ubuntu.com> wrote:
> > On Mon, 2009-11-30 at 18:57 -0600, Steve Conklin wrote:
> >> This email summarizes a discussion that took place on #ubuntu-x IRC, and
> >> the tentative plan that was arrived at. The IRC discussion is attached
> >> for reference.
> >>
> >> First, there was a discussion of what is required in order to bring
> >> Nouveau into our kernel. Nouveau brings in the entire drm-next tree,
> >> which looks like it amounts to over 500 patches right now. This
> >> presents a major issue for the kernel team, in how to manage that.
> >
> > I have been talking with Ben Skeggs (darktama on freenode) the nouveau
> > dev paid by Red Hat, who is also deciding what to do about updating
> > nouveau in Fedora rawhide.
> >
> > He thinks that the nouveau kernel module should work against the stock
> > 2.6.32 drm tree, so I tried copying drivers/gpu/drm/nouveau and
> > associated headers into the lucid kernel tree, the results of which are
> > in the nouveau-scratchpad branch of
> > http://cooperteam.net/lucid-kernel-nouveau.git .  The only changes
> > outside of the nouveau-specific directories are hooking up the Kconfig &
> > Makefiles, and exporting 4 extra symbols from ttm.ko.
> 
> Which exported symbols are those and what other new video drivers use
> from the 2.6.32 drm tree?
> 
The symbols are:
ttm_bo_wait_unreserved
ttm_bo_wait_cpu
ttm_bo_synccpu_write_grab
ttm_bo_synccpu_write_release

None of the other drm drivers in the 2.6.32 tree use these symbols,
although it's possible that a more recent radeon drm would; I'm not
familiar with the radeon world.
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