From: Dave Gordon <david.s.gordon@xxxxxxxxx>
There is a workaround for a hardware bug when reading the seqno from the status
page. The bug does not exist on VLV however, the workaround was still being
applied.
Change-Id: Ic781fdb31e1f794ce1fa8a6d0d5ee379756c5db6
Signed-off-by: Dave Gordon <david.s.gordon@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_ringbuffer.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3887f1a..f990ce4 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2367,7 +2367,10 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
ring->irq_get = gen6_ring_get_irq;
ring->irq_put = gen6_ring_put_irq;
ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
- ring->get_seqno = gen6_ring_get_seqno;
+ if (IS_VALLEYVIEW(dev))
+ ring->get_seqno = ring_get_seqno;
+ else
+ ring->get_seqno = gen6_ring_get_seqno;
ring->set_seqno = ring_set_seqno;
if (i915_semaphore_is_enabled(dev)) {
ring->semaphore.sync_to = gen6_ring_sync;
--
1.7.9.5
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