Dave Airlie ebff5fa9d5 Revert "i915: Update VGA arbiter support for newer devices" ... This reverts commit 81b5c7bc8d. Adding drm/i915 into the vga arbiter chain means that X (in a piece of well-meant paranoia) will do a get/put on the vga decoding around _every_ accel call down into the ddx. Which results in some nice performance disasters [1]. This really breaks userspace, by disabling DRI for everyone, and stops OpenGL from working, this isn't limited to just the i915 but both the integrated and discrete GPUs on multi-gpu systems, in other words this causes untold worlds of pain, Ville tried to come up with a Great Hack to fiddle the required VGA I/O ops behind everyone's back using stop_machine, but that didn't really work out [2]. Given that we're fairly late in the -rc stage for such games let's just revert this all. One thing we might want to keep is to delay the disabling of the vga decoding until the fbdev emulation and the fbcon screen is set up. If we kill vga mem decoding beforehand fbcon can end up with a white square in the top-left corner it tried to save from the vga memory for a seamless transition. And we have bug reports on older platforms which seem to match these symptoms. But again that's something to play around with in -next. References: [1] http://lists.x.org/archives/xorg-devel/2013-September/037763.html References: [2] http://www.spinics.net/lists/intel-gfx/msg34062.html Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>		2013-10-11 15:19:22 +10:00
..
drm	Revert "i915: Update VGA arbiter support for newer devices"	2013-10-11 15:19:22 +10:00
host1x	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2013-09-05 10:17:26 -07:00
vga	vgaarb: Fix VGA decodes changes	2013-09-03 19:17:59 +02:00
Makefile	gpu: host1x: Add host1x driver	2013-04-22 12:32:40 +02:00