[Intel-gfx] [PATCH v2 0/3] disable rings before sync flush

[naresh.kumar.kachhi at intel.com]

From: Naresh Kumar Kachhi <naresh.kumar.kachhi at intel.com>

initial version: stop rings before sync flush

v1: address the comments from Chris Wilson on
http://www.spinics.net/lists/intel-gfx/msg41025.html.
Rather than adding stop and start ring, we are moving
ring disable before hw_status_page_setup (sync flush).

v2: Based on Chris's suggestion. Added one more patch to wait
until the rings become idle after disabling. In case of timeout
we log a message. 

Naresh Kumar Kachhi (3):
  drm/i915: disable rings before HW status page setup
  drm/i915: wait for rings to become idle once disabled
  drm/i915: warn if ring is active before sync flush

 drivers/gpu/drm/i915/i915_reg.h         |  2 ++
 drivers/gpu/drm/i915/intel_ringbuffer.c | 18 +++++++++++++-----
 drivers/gpu/drm/i915/intel_ringbuffer.h |  2 ++
 3 files changed, 17 insertions(+), 5 deletions(-)

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1.8.5.3