Messages in this thread Patch in this message | | | From | Lyude <> | Subject | [PATCH 6/7] drm: Add ratelimited versions of the DRM_DEBUG* macros | Date | Fri, 5 Aug 2016 20:30:38 -0400 |
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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@redhat.com> --- 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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