[PATCH 0/6] drm: qemu hardware patches

[Daniel Vetter]

On Wed, Nov 06, 2013 at 01:39:46PM +1000, Dave Airlie wrote:
> > Here comes a collection of drm patches for qemu emulated
> > virtual graphics cards.  Small improvements for cirrus
> > and qxl.  A new kms driver for the qemu standard vga.
> >
> > Patches 1-4 can be queued up for merge, unless someone
> > finds bugs / problems in review of course.
> 
> Hi Gerd,
> 
> I've merged 1-4, thanks for those.
> >
> > Patches 5+6 have known issues and are still work-in-progress.
> > I'm posing them for early review nevertheless.
> 
> Yeah I'm not really sure I like request_regions for drm drivers, yes
> its nice to see things, but the fact
> that we always get in trouble with efifb and vesafb and that people
> seem to insist on later coming along
> and supplying unhelpful patches to fix the lack of return checking, I
> generally just steer clear.

We've recently started to request_region the intel graphics stolen block.
Surprising how much gunk the core pci resource layer loves to put in
there, so caught a few real bugs. Also it's a major pain to actually get
it to work (some random platform has an off-by-one apparently and fun
stuff like that). But I agree that for the mmio bars it's probably not
worth the trouble due to vesafb/efifb bonghits.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch