diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 46f59883183d..7dcb8354f19d 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -1289,7 +1289,7 @@ void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe) { struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe); int ret; - u64 last; + u64 last, curr; if (drm_WARN_ON(dev, pipe >= dev->num_crtcs)) return; @@ -1305,7 +1305,19 @@ void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe) last != drm_vblank_count(dev, pipe), msecs_to_jiffies(100)); - drm_WARN(dev, ret == 0, "vblank wait timed out on crtc %i\n", pipe); + curr = drm_vblank_count(dev, pipe); + + if (ret == 0) { + /* Avoid spamming WARNs for timeouts which can be caused by + * heavy scheduling pressure or invalid userspace calls (fuzzing). + * Use debug message instead. + */ + drm_dbg_kms(dev,"WAIT_VBLANK: timeout crtc=%d, last=%llu, curr=%llu\n", + pipe, last, curr); + } else { + drm_dbg_kms(dev,"WAIT_VBLANK: completed crtc=%d, last=%llu, curr=%llu\n", + pipe, last, curr); + } drm_vblank_put(dev, pipe); }