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Subject[PATCH v5 30/33] drm_print: add _ddebug descriptor to drm_*dbg prototypes
Date
upgrade the callchain to drm_dbg() and drm_dev_dbg(); add a struct
_ddebug ptr parameter to them, and supply that additional param by
replacing the '_no_desc' flavor of dyndbg Factory macro currently used
with the flavor that supplies the descriptor.

NOTES:

The descriptor gives these fns access to the decorator flags, but does
none of the dynamic-prefixing done by __dynamic_emit_prefix().

DRM already has conventions for logging/messaging; just tossing
optional decorations on top may not help. Instead, existing flags (or
new ones) can be used to make current conventions optional.

For CONFIG_DRM_USE_DYNAMIC_DEBUG=N, just pass null.

Note: desc->class_id is redundant with category parameter, but its
availability is dependent on desc.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
drivers/gpu/drm/drm_print.c | 8 +++++---
include/drm/drm_print.h | 23 ++++++++++++-----------
2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
index ec477c44a784..5b93c11895bb 100644
--- a/drivers/gpu/drm/drm_print.c
+++ b/drivers/gpu/drm/drm_print.c
@@ -29,6 +29,7 @@
#include <linux/moduleparam.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
+#include <linux/dynamic_debug.h>

#include <drm/drm.h>
#include <drm/drm_drv.h>
@@ -278,8 +279,8 @@ void drm_dev_printk(const struct device *dev, const char *level,
}
EXPORT_SYMBOL(drm_dev_printk);

-void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
- const char *format, ...)
+void __drm_dev_dbg(struct _ddebug *desc, const struct device *dev,
+ enum drm_debug_category category, const char *format, ...)
{
struct va_format vaf;
va_list args;
@@ -287,6 +288,7 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
if (!__drm_debug_enabled(category))
return;

+ /* we know we are printing for either syslog, tracefs, or both */
va_start(args, format);
vaf.fmt = format;
vaf.va = &args;
@@ -302,7 +304,7 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
}
EXPORT_SYMBOL(__drm_dev_dbg);

-void ___drm_dbg(enum drm_debug_category category, const char *format, ...)
+void ___drm_dbg(struct _ddebug *desc, enum drm_debug_category category, const char *format, ...)
{
struct va_format vaf;
va_list args;
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 7631b5fb669e..46f14cfb401e 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -363,9 +363,10 @@ static inline bool drm_debug_enabled(enum drm_debug_category category)
__printf(3, 4)
void drm_dev_printk(const struct device *dev, const char *level,
const char *format, ...);
-__printf(3, 4)
-void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
- const char *format, ...);
+struct _ddebug;
+__printf(4, 5)
+void __drm_dev_dbg(struct _ddebug *desc, const struct device *dev,
+ enum drm_debug_category category, const char *format, ...);

/**
* DRM_DEV_ERROR() - Error output.
@@ -415,11 +416,11 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,

#if !defined(CONFIG_DRM_USE_DYNAMIC_DEBUG)
#define drm_dev_dbg(dev, cat, fmt, ...) \
- __drm_dev_dbg(dev, cat, fmt, ##__VA_ARGS__)
+ __drm_dev_dbg(NULL, dev, cat, fmt, ##__VA_ARGS__)
#else
#define drm_dev_dbg(dev, cat, fmt, ...) \
- _dynamic_func_call_no_desc(fmt, __drm_dev_dbg, \
- dev, cat, fmt, ##__VA_ARGS__)
+ _dynamic_func_call_cls(cat, fmt, __drm_dev_dbg, \
+ dev, cat, fmt, ##__VA_ARGS__)
#endif

/**
@@ -523,17 +524,17 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
* Prefer drm_device based logging over device or prink based logging.
*/

-__printf(2, 3)
-void ___drm_dbg(enum drm_debug_category category, const char *format, ...);
+__printf(3, 4)
+void ___drm_dbg(struct _ddebug *desc, enum drm_debug_category category, const char *format, ...);
__printf(1, 2)
void __drm_err(const char *format, ...);

#if !defined(CONFIG_DRM_USE_DYNAMIC_DEBUG)
-#define __drm_dbg(fmt, ...) ___drm_dbg(fmt, ##__VA_ARGS__)
+#define __drm_dbg(fmt, ...) ___drm_dbg(NULL, fmt, ##__VA_ARGS__)
#else
#define __drm_dbg(cat, fmt, ...) \
- _dynamic_func_call_no_desc(fmt, ___drm_dbg, \
- cat, fmt, ##__VA_ARGS__)
+ _dynamic_func_call_cls(cat, fmt, ___drm_dbg, \
+ cat, fmt, ##__VA_ARGS__)
#endif

/* Macros to make printk easier */
--
2.37.1
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