diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 617634b6a6c2..c50388a86bca 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -984,6 +984,10 @@ void intel_ring_setup_status_page(struct intel_ring_buffer *ring) /* Flush the TLB for this page */ if (INTEL_INFO(dev)->gen >= 6) { u32 reg = RING_INSTPM(ring->mmio_base); + + /* ring should be idle before issuing a sync flush*/ + WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0); + I915_WRITE(reg, _MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE | INSTPM_SYNC_FLUSH)); |