drm: add per-event vblank event trace points
Allows us to track each process that requests and completes events.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 6d201a8..c2ecb3e 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -588,6 +588,7 @@
return -ENOMEM;
e->pipe = pipe;
+ e->base.pid = current->pid;
e->event.base.type = DRM_EVENT_VBLANK;
e->event.base.length = sizeof e->event;
e->event.user_data = vblwait->request.signal;
@@ -615,6 +616,9 @@
DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n",
vblwait->request.sequence, seq, pipe);
+ trace_drm_vblank_event_queued(current->pid, pipe,
+ vblwait->request.sequence);
+
e->event.sequence = vblwait->request.sequence;
if ((seq - vblwait->request.sequence) <= (1 << 23)) {
e->event.tv_sec = now.tv_sec;
@@ -622,6 +626,8 @@
drm_vblank_put(dev, e->pipe);
list_add_tail(&e->base.link, &e->base.file_priv->event_list);
wake_up_interruptible(&e->base.file_priv->event_wait);
+ trace_drm_vblank_event_delivered(current->pid, pipe,
+ vblwait->request.sequence);
} else {
list_add_tail(&e->base.link, &dev->vblank_event_list);
}
@@ -752,6 +758,8 @@
drm_vblank_put(dev, e->pipe);
list_move_tail(&e->base.link, &e->base.file_priv->event_list);
wake_up_interruptible(&e->base.file_priv->event_wait);
+ trace_drm_vblank_event_delivered(e->base.pid, e->pipe,
+ e->event.sequence);
}
spin_unlock_irqrestore(&dev->event_lock, flags);