<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [ivb gt2] GPU hangs in 4.0: where did my seqno writes go?" href="https://bugs.freedesktop.org/show_bug.cgi?id=89467#c54">Comment # 54</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [ivb gt2] GPU hangs in 4.0: where did my seqno writes go?" href="https://bugs.freedesktop.org/show_bug.cgi?id=89467">bug 89467</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>I don't have a good explanation, but we may as well try punching a few things and see what we can break: diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index e5b3c6dbd467..c972f24d50cc 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1087,18 +1087,20 @@ gen6_add_request(struct intel_engine_cs *ring) int ret; if (ring->semaphore.signal) - ret = ring->semaphore.signal(ring, 4); + ret = ring->semaphore.signal(ring, 6); else - ret = intel_ring_begin(ring, 4); + ret = intel_ring_begin(ring, 6); if (ret) return ret; + intel_ring_emit(ring, MI_ARB_ON_OFF | MI_ARB_DISABLE); intel_ring_emit(ring, MI_STORE_DWORD_INDEX); intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT); intel_ring_emit(ring, i915_gem_request_get_seqno(ring->outstanding_lazy_request)); intel_ring_emit(ring, MI_USER_INTERRUPT); + intel_ring_emit(ring, MI_ARB_ON_OFF | MI_ARB_ENABLE); __intel_ring_advance(ring); return 0;</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>