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_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 4dfeec7..c3ceffa 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -725,6 +725,16 @@
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
+void i915_trace_irq_get(struct drm_device *dev, u32 seqno)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+
+ if (dev_priv->trace_irq_seqno == 0)
+ i915_user_irq_get(dev);
+
+ dev_priv->trace_irq_seqno = seqno;
+}
+
static int i915_wait_irq(struct drm_device * dev, int irq_nr)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;