drm/i915: Enable irq to trace batch buffer completion.
If we trigger a tracepoint for batch buffer submission, it is a reasonable
assumption that we wish to also trace the batch buffer completion. So in
order to capture the completion events, we need to enable irqs... However,
we cannot rely on the completion event to disable the irq later, so we
defer the irq disable to the retire request.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index b5f9df2..abfc27b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1770,7 +1770,7 @@
drm_i915_private_t *dev_priv = dev->dev_private;
uint32_t seqno;
- if (!dev_priv->hw_status_page)
+ if (!dev_priv->hw_status_page || list_empty(&dev_priv->mm.request_list))
return;
seqno = i915_get_gem_seqno(dev);
@@ -1794,6 +1794,12 @@
} else
break;
}
+
+ if (unlikely (dev_priv->trace_irq_seqno &&
+ i915_seqno_passed(dev_priv->trace_irq_seqno, seqno))) {
+ i915_user_irq_put(dev);
+ dev_priv->trace_irq_seqno = 0;
+ }
}
void