drm/i915: Force the CS stall for invalidate flushes
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 16 Dec 2014 08:44:32 +0000 (08:44 +0000)
committerJani Nikula <jani.nikula@intel.com>
Tue, 16 Dec 2014 13:06:48 +0000 (15:06 +0200)
commitadd284a3a2481e759d6bec35f6444c32c8ddc383
tree0025131e13d320a2a644f375a869f93a41311873
parent148b83d0815a3778c8949e6a97cb798cbaa0efb3
drm/i915: Force the CS stall for invalidate flushes

In order to act as a full command barrier by itself, we need to tell the
pipecontrol to actually stall the command streamer while the flush runs.
We require the full command barrier before operations like
MI_SET_CONTEXT, which currently rely on a prior invalidate flush.

References: https://bugs.freedesktop.org/show_bug.cgi?id=83677
Cc: Simon Farnsworth <simon@farnz.org.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/intel_ringbuffer.c