There's a couple of places where this would be useful for drivers (such
as reporting DP aux transaction timeouts).
Signed-off-by: Lyude <cpaul@xxxxxxxxxx>
---
include/drm/drmP.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index d377865..1c4d91b 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -231,6 +231,36 @@ void drm_err(const char *format, ...);
drm_ut_debug_printk(__func__, fmt, ##args); \
} while (0)
+#define _DRM_DEFINE_DEBUG_RATELIMITED(level, fmt, args...) \
+ do { \
+ if (unlikely(drm_debug & DRM_UT_ ## level)) { \
+ static DEFINE_RATELIMIT_STATE( \
+ _rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ \
+ if (__ratelimit(&_rs)) { \
+ drm_ut_debug_printk(__func__, fmt, \
+ ##args); \
+ } \
+ } \
+ } while (0)
+
+/**
+ * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
+ *
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_DEBUG_RATELIMITED(fmt, args...) \
+ _DRM_DEFINE_DEBUG_RATELIMITED(CORE, fmt, ##args)
+#define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...) \
+ _DRM_DEFINE_DEBUG_RATELIMITED(DRIVER, fmt, ##args)
+#define DRM_DEBUG_KMS_RATELIMITED(fmt, args...) \
+ _DRM_DEFINE_DEBUG_RATELIMITED(KMS, fmt, ##args)
+#define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...) \
+ _DRM_DEFINE_DEBUG_RATELIMITED(PRIME, fmt, ##args)
+
/*@}*/
/***********************************************************************/
--
2.7.4
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