[Intel-gfx] [PATCH v3 1/3] drm/print: Add drm_debug_once* macros

["Jouni Högander" <jouni.hogander@intel.com>]

Add drm_debug_once* macros to allow printing out one time debug
messages which can be still controlled via drm.debug parameter.

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
---
 include/drm/drm_print.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 22fabdeed297..e339f47eeb6d 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -476,6 +476,35 @@ void drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
 #define drm_dbg_drmres(drm, fmt, ...)					\
 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
 
+#define drm_dev_dbg_once(dev, cat, fmt, ...)			\
+({								\
+	static bool __print_once __read_mostly;			\
+	if (!__print_once) {					\
+		__print_once = true;				\
+		drm_dev_dbg(dev, cat, fmt, ##__VA_ARGS__);	\
+	}							\
+})
+
+#define drm_dbg_once_core(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_CORE, fmt, ##__VA_ARGS__)
+#define drm_dbg_once(drm, fmt, ...)						\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_kms(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_KMS, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_prime(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_atomic(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_vbl(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_VBL, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_state(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_STATE, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_lease(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_LEASE, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_dp(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_DP, fmt, ##__VA_ARGS__)
+#define drm_dbg_once_drmres(drm, fmt, ...)					\
+	drm_dev_dbg_once((drm) ? (drm)->dev : NULL, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
 
 /*
  * printk based logging
-- 
2.25.1