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drm: Add ratelimited versions of the DRM_DEBUG* macros 

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>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1470443443-27252-7-git-send-email-cpaul@redhat.com
This commit is contained in:
Lyude 2016-08-05 20:30:38 -04:00 committed by Daniel Vetter
parent cfc5adea19
commit 27528c667a
1 changed files with 30 additions and 0 deletions
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30
include/drm/drmP.h
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@ -232,6 +232,36 @@ 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)
/*@}*/
/***********************************************************************/