This replicates what we've done in i915 in
commit 31e4b89acbd7b19c9a8557e6e660a583a0b97daa
Author: Damien Lespiau <damien.lespiau@xxxxxxxxx>
Date: Mon Aug 18 13:51:00 2014 +0100
drm/i915: Print the pipe on which the vblank wait times out
to make sure that when we switch i915 to drm_wait_one_vblank that the
debug output doesn't regress.
Cc: Damien Lespiau <damien.lespiau@xxxxxxxxx>
Cc: Thomas Wood <thomas.wood@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_irq.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index e73cbdaa18df..5ef03c216a27 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1077,7 +1077,7 @@ void drm_wait_one_vblank(struct drm_device *dev, int crtc)
u32 last;
ret = drm_vblank_get(dev, crtc);
- if (WARN_ON(ret))
+ if (WARN(ret, "vblank not available on crtc %i, ret=%i\n", crtc, ret))
return;
last = drm_vblank_count(dev, crtc);
@@ -1086,7 +1086,7 @@ void drm_wait_one_vblank(struct drm_device *dev, int crtc)
last != drm_vblank_count(dev, crtc),
msecs_to_jiffies(100));
- WARN_ON(ret == 0);
+ WARN(ret == 0, "vblank wait timed out on crtc %i\n", crtc);
drm_vblank_put(dev, crtc);
}
--
2.0.1
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