drm_print.h File Reference

#include <linux/compiler.h>
#include <linux/printk.h>
#include <linux/ratelimit.h>
#include <linux/device.h>
#include <linux/dynamic_debug.h>
#include <drm/drm.h>
#include <drm/drm_device.h>

Include dependency graph for drm_print.h:

Go to the source code of this file.

Classes
struct	drm_printer
struct	drm_print_iterator

Macros
#define	drm_debug_enabled_instrumented(category)
#define	__drm_debug_enabled(category)   drm_debug_enabled_raw(category)
#define	drm_debug_enabled(category)   drm_debug_enabled_raw(category)
#define	drm_printf_indent(printer, indent, fmt, ...)    drm_printf((printer), "%.*s" fmt, (indent), "\t\t\t\t\tX", ##__VA_ARGS__)
#define	DRM_DEV_ERROR(dev, fmt, ...)    drm_dev_printk(dev, KERN_ERR, "*ERROR* " fmt, ##__VA_ARGS__)
#define	DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...)
#define	DRM_DEV_INFO(dev, fmt, ...)    drm_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
#define	DRM_DEV_INFO_ONCE(dev, fmt, ...)
#define	drm_dev_dbg(dev, cat, fmt, ...)    __drm_dev_dbg(NULL, dev, cat, fmt, ##__VA_ARGS__)
#define	DRM_DEV_DEBUG(dev, fmt, ...)    drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)
#define	DRM_DEV_DEBUG_DRIVER(dev, fmt, ...)    drm_dev_dbg(dev, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
#define	DRM_DEV_DEBUG_KMS(dev, fmt, ...)    drm_dev_dbg(dev, DRM_UT_KMS, fmt, ##__VA_ARGS__)
#define	__drm_printk(drm, level, type, fmt, ...)    dev_##level##type(__drm_to_dev(drm), "[drm] " fmt, ##__VA_ARGS__)
#define	drm_info(drm, fmt, ...)    __drm_printk((drm), info,, fmt, ##__VA_ARGS__)
#define	drm_notice(drm, fmt, ...)    __drm_printk((drm), notice,, fmt, ##__VA_ARGS__)
#define	drm_warn(drm, fmt, ...)    __drm_printk((drm), warn,, fmt, ##__VA_ARGS__)
#define	drm_err(drm, fmt, ...)    __drm_printk((drm), err,, "*ERROR* " fmt, ##__VA_ARGS__)
#define	drm_info_once(drm, fmt, ...)    __drm_printk((drm), info, _once, fmt, ##__VA_ARGS__)
#define	drm_notice_once(drm, fmt, ...)    __drm_printk((drm), notice, _once, fmt, ##__VA_ARGS__)
#define	drm_warn_once(drm, fmt, ...)    __drm_printk((drm), warn, _once, fmt, ##__VA_ARGS__)
#define	drm_err_once(drm, fmt, ...)    __drm_printk((drm), err, _once, "*ERROR* " fmt, ##__VA_ARGS__)
#define	drm_err_ratelimited(drm, fmt, ...)    __drm_printk((drm), err, _ratelimited, "*ERROR* " fmt, ##__VA_ARGS__)
#define	drm_dbg_core(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_CORE, fmt, ##__VA_ARGS__)
#define	drm_dbg_driver(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
#define	drm_dbg_kms(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_KMS, fmt, ##__VA_ARGS__)
#define	drm_dbg_prime(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_PRIME, fmt, ##__VA_ARGS__)
#define	drm_dbg_atomic(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
#define	drm_dbg_vbl(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_VBL, fmt, ##__VA_ARGS__)
#define	drm_dbg_state(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_STATE, fmt, ##__VA_ARGS__)
#define	drm_dbg_lease(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_LEASE, fmt, ##__VA_ARGS__)
#define	drm_dbg_dp(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_DP, fmt, ##__VA_ARGS__)
#define	drm_dbg_drmres(drm, fmt, ...)    drm_dev_dbg(__drm_to_dev(drm), DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
#define	drm_dbg(drm, fmt, ...)   drm_dbg_driver(drm, fmt, ##__VA_ARGS__)
#define	__drm_dbg(cat, fmt, ...)   __drm_dev_dbg(NULL, NULL, cat, fmt, ##__VA_ARGS__)
#define	_DRM_PRINTK(once, level, fmt, ...)    printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
#define	DRM_INFO(fmt, ...)    _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
#define	DRM_NOTE(fmt, ...)    _DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
#define	DRM_WARN(fmt, ...)    _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
#define	DRM_INFO_ONCE(fmt, ...)    _DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
#define	DRM_NOTE_ONCE(fmt, ...)    _DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
#define	DRM_WARN_ONCE(fmt, ...)    _DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
#define	DRM_ERROR(fmt, ...)    __drm_err(fmt, ##__VA_ARGS__)
#define	DRM_ERROR_RATELIMITED(fmt, ...)    DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG(fmt, ...)    __drm_dbg(DRM_UT_CORE, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_DRIVER(fmt, ...)    __drm_dbg(DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_KMS(fmt, ...)    __drm_dbg(DRM_UT_KMS, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_PRIME(fmt, ...)    __drm_dbg(DRM_UT_PRIME, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_ATOMIC(fmt, ...)    __drm_dbg(DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_VBL(fmt, ...)    __drm_dbg(DRM_UT_VBL, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_LEASE(fmt, ...)    __drm_dbg(DRM_UT_LEASE, fmt, ##__VA_ARGS__)
#define	DRM_DEBUG_DP(fmt, ...)    __drm_dbg(DRM_UT_DP, fmt, ## __VA_ARGS__)
#define	__DRM_DEFINE_DBG_RATELIMITED(category, drm, fmt, ...)
#define	drm_dbg_ratelimited(drm, fmt, ...)    __DRM_DEFINE_DBG_RATELIMITED(DRIVER, drm, fmt, ## __VA_ARGS__)
#define	drm_dbg_kms_ratelimited(drm, fmt, ...)    __DRM_DEFINE_DBG_RATELIMITED(KMS, drm, fmt, ## __VA_ARGS__)
#define	drm_WARN(drm, condition, format, arg...)
#define	drm_WARN_ONCE(drm, condition, format, arg...)
#define	drm_WARN_ON(drm, x)
#define	drm_WARN_ON_ONCE(drm, x)

Enumerations
enum	drm_debug_category {   DRM_UT_CORE , DRM_UT_DRIVER , DRM_UT_KMS , DRM_UT_PRIME ,   DRM_UT_ATOMIC , DRM_UT_VBL , DRM_UT_STATE , DRM_UT_LEASE ,   DRM_UT_DP , DRM_UT_DRMRES }

Functions
void	__drm_printfn_coredump (struct drm_printer *p, struct va_format *vaf)
void	__drm_puts_coredump (struct drm_printer *p, const char *str)
void	__drm_printfn_seq_file (struct drm_printer *p, struct va_format *vaf)
void	__drm_puts_seq_file (struct drm_printer *p, const char *str)
void	__drm_printfn_info (struct drm_printer *p, struct va_format *vaf)
void	__drm_printfn_dbg (struct drm_printer *p, struct va_format *vaf)
void	__drm_printfn_err (struct drm_printer *p, struct va_format *vaf)
void	__drm_printfn_line (struct drm_printer *p, struct va_format *vaf)
	__printf (2, 3) void drm_printf(struct drm_printer *p
const char void	drm_puts (struct drm_printer *p, const char *str)
void	drm_print_regset32 (struct drm_printer *p, struct debugfs_regset32 *regset)
void	drm_print_bits (struct drm_printer *p, unsigned long value, const char *const bits[], unsigned int nbits)
void	drm_print_hex_dump (struct drm_printer *p, const char *prefix, const u8 *buf, size_t len)
	__printf (2, 0) static inline void drm_vprintf(struct drm_printer *p
p	printfn (p, &vaf)
	__printf (3, 4) void drm_dev_printk(const struct device *dev
	__printf (4, 5) void __drm_dev_dbg(struct _ddebug *desc
	__printf (1, 2) void __drm_err(const char *format

Variables
unsigned long	__drm_debug
const char *	f
const char *	fmt
const char va_list *	va
const char *	level
const char const char *	format
const struct device *	dev

Macro Definition Documentation

__drm_dbg

#define __drm_dbg	(		cat,
			fmt,
			...
	)		__drm_dev_dbg(NULL, NULL, cat, fmt, ##__VA_ARGS__)

__drm_debug_enabled

#define __drm_debug_enabled

(

category

)

drm_debug_enabled_raw(category)

__DRM_DEFINE_DBG_RATELIMITED

#define __DRM_DEFINE_DBG_RATELIMITED	(		category,
			drm,
			fmt,
			...
	)

Value:

({                                              \
    static DEFINE_RATELIMIT_STATE(rs_, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);\
                                                \
    if (drm_debug_enabled(DRM_UT_ ## category) && __ratelimit(&rs_))            \
        drm_dev_printk(__drm_to_dev(drm), KERN_DEBUG, fmt, ## __VA_ARGS__);     \
})

__drm_printk

#define __drm_printk	(		drm,
			level,
			type,
			fmt,
			...
	)		dev_##level##type(__drm_to_dev(drm), "[drm] " fmt, ##__VA_ARGS__)

_DRM_PRINTK

#define _DRM_PRINTK	(		once,
			level,
			fmt,
			...
	)		printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)

drm_dbg

#define drm_dbg	(		drm,
			fmt,
			...
	)		drm_dbg_driver(drm, fmt, ##__VA_ARGS__)

drm_dbg_atomic

#define drm_dbg_atomic	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)

drm_dbg_core

#define drm_dbg_core	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_CORE, fmt, ##__VA_ARGS__)

drm_dbg_dp

#define drm_dbg_dp	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_DP, fmt, ##__VA_ARGS__)

drm_dbg_driver

#define drm_dbg_driver	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_DRIVER, fmt, ##__VA_ARGS__)

drm_dbg_drmres

#define drm_dbg_drmres	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_DRMRES, fmt, ##__VA_ARGS__)

drm_dbg_kms

#define drm_dbg_kms	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_KMS, fmt, ##__VA_ARGS__)

drm_dbg_kms_ratelimited

#define drm_dbg_kms_ratelimited	(		drm,
			fmt,
			...
	)		__DRM_DEFINE_DBG_RATELIMITED(KMS, drm, fmt, ## __VA_ARGS__)

drm_dbg_lease

#define drm_dbg_lease	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_LEASE, fmt, ##__VA_ARGS__)

drm_dbg_prime

#define drm_dbg_prime	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_PRIME, fmt, ##__VA_ARGS__)

drm_dbg_ratelimited

#define drm_dbg_ratelimited	(		drm,
			fmt,
			...
	)		__DRM_DEFINE_DBG_RATELIMITED(DRIVER, drm, fmt, ## __VA_ARGS__)

drm_dbg_state

#define drm_dbg_state	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_STATE, fmt, ##__VA_ARGS__)

drm_dbg_vbl

#define drm_dbg_vbl	(		drm,
			fmt,
			...
	)		drm_dev_dbg(__drm_to_dev(drm), DRM_UT_VBL, fmt, ##__VA_ARGS__)

DRM_DEBUG

#define DRM_DEBUG	(		fmt,
			...
	)		__drm_dbg(DRM_UT_CORE, fmt, ##__VA_ARGS__)

DRM_DEBUG_ATOMIC

#define DRM_DEBUG_ATOMIC	(		fmt,
			...
	)		__drm_dbg(DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)

DRM_DEBUG_DP

#define DRM_DEBUG_DP	(		fmt,
			...
	)		__drm_dbg(DRM_UT_DP, fmt, ## __VA_ARGS__)

DRM_DEBUG_DRIVER

#define DRM_DEBUG_DRIVER	(		fmt,
			...
	)		__drm_dbg(DRM_UT_DRIVER, fmt, ##__VA_ARGS__)

drm_debug_enabled

#define drm_debug_enabled

(

category

)

drm_debug_enabled_raw(category)

drm_debug_enabled_instrumented

#define drm_debug_enabled_instrumented

(

category

)

Value:

    ({                              \
        pr_debug("todo: is this frequent enough to optimize ?\n"); \
        drm_debug_enabled_raw(category);            \
    })

DRM_DEBUG_KMS

#define DRM_DEBUG_KMS	(		fmt,
			...
	)		__drm_dbg(DRM_UT_KMS, fmt, ##__VA_ARGS__)

DRM_DEBUG_LEASE

#define DRM_DEBUG_LEASE	(		fmt,
			...
	)		__drm_dbg(DRM_UT_LEASE, fmt, ##__VA_ARGS__)

DRM_DEBUG_PRIME

#define DRM_DEBUG_PRIME	(		fmt,
			...
	)		__drm_dbg(DRM_UT_PRIME, fmt, ##__VA_ARGS__)

DRM_DEBUG_VBL

#define DRM_DEBUG_VBL	(		fmt,
			...
	)		__drm_dbg(DRM_UT_VBL, fmt, ##__VA_ARGS__)

drm_dev_dbg

#define drm_dev_dbg	(		dev,
			cat,
			fmt,
			...
	)		__drm_dev_dbg(NULL, dev, cat, fmt, ##__VA_ARGS__)

DRM_DEV_DEBUG

#define DRM_DEV_DEBUG	(		dev,
			fmt,
			...
	)		drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)

DRM_DEV_DEBUG() - Debug output for generic drm code

NOTE: this is deprecated in favor of drm_dbg_core().

@dev: device pointer @fmt: printf() like format string.

DRM_DEV_DEBUG_DRIVER

#define DRM_DEV_DEBUG_DRIVER	(		dev,
			fmt,
			...
	)		drm_dev_dbg(dev, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)

DRM_DEV_DEBUG_DRIVER() - Debug output for vendor specific part of the driver

NOTE: this is deprecated in favor of drm_dbg() or dev_dbg().

@dev: device pointer @fmt: printf() like format string.

DRM_DEV_DEBUG_KMS

#define DRM_DEV_DEBUG_KMS	(		dev,
			fmt,
			...
	)		drm_dev_dbg(dev, DRM_UT_KMS, fmt, ##__VA_ARGS__)

DRM_DEV_DEBUG_KMS() - Debug output for modesetting code

NOTE: this is deprecated in favor of drm_dbg_kms().

@dev: device pointer @fmt: printf() like format string.

DRM_DEV_ERROR

#define DRM_DEV_ERROR	(		dev,
			fmt,
			...
	)		drm_dev_printk(dev, KERN_ERR, "*ERROR* " fmt, ##__VA_ARGS__)

DRM_DEV_ERROR() - Error output.

NOTE: this is deprecated in favor of drm_err() or dev_err().

@dev: device pointer @fmt: printf() like format string.

DRM_DEV_ERROR_RATELIMITED

#define DRM_DEV_ERROR_RATELIMITED	(		dev,
			fmt,
			...
	)

Value:

({                                  \
    static DEFINE_RATELIMIT_STATE(_rs,              \
                      DEFAULT_RATELIMIT_INTERVAL,   \
                      DEFAULT_RATELIMIT_BURST);     \
                                    \
    if (__ratelimit(&_rs))                      \
        DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__);         \
})

DRM_DEV_ERROR_RATELIMITED() - Rate limited error output.

NOTE: this is deprecated in favor of drm_err_ratelimited() or dev_err_ratelimited().

@dev: device pointer @fmt: printf() like format string.

Like DRM_ERROR() but won't flood the log.

DRM_DEV_INFO

#define DRM_DEV_INFO	(		dev,
			fmt,
			...
	)		drm_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)

DRM_DEV_INFO_ONCE

#define DRM_DEV_INFO_ONCE	(		dev,
			fmt,
			...
	)

Value:

({                                  \
    static bool __print_once __read_mostly;             \
    if (!__print_once) {                        \
        __print_once = true;                    \
        DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__);          \
    }                               \
})

drm_err

#define drm_err	(		drm,
			fmt,
			...
	)		__drm_printk((drm), err,, "*ERROR* " fmt, ##__VA_ARGS__)

drm_err_once

#define drm_err_once	(		drm,
			fmt,
			...
	)		__drm_printk((drm), err, _once, "*ERROR* " fmt, ##__VA_ARGS__)

drm_err_ratelimited

#define drm_err_ratelimited	(		drm,
			fmt,
			...
	)		__drm_printk((drm), err, _ratelimited, "*ERROR* " fmt, ##__VA_ARGS__)

DRM_ERROR

#define DRM_ERROR	(		fmt,
			...
	)		__drm_err(fmt, ##__VA_ARGS__)

DRM_ERROR_RATELIMITED

#define DRM_ERROR_RATELIMITED	(		fmt,
			...
	)		DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)

drm_info

#define drm_info	(		drm,
			fmt,
			...
	)		__drm_printk((drm), info,, fmt, ##__VA_ARGS__)

DRM_INFO

#define DRM_INFO	(		fmt,
			...
	)		_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)

drm_info_once

#define drm_info_once	(		drm,
			fmt,
			...
	)		__drm_printk((drm), info, _once, fmt, ##__VA_ARGS__)

DRM_INFO_ONCE

#define DRM_INFO_ONCE	(		fmt,
			...
	)		_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)

DRM_NOTE

#define DRM_NOTE	(		fmt,
			...
	)		_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)

DRM_NOTE_ONCE

#define DRM_NOTE_ONCE	(		fmt,
			...
	)		_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)

drm_notice

#define drm_notice	(		drm,
			fmt,
			...
	)		__drm_printk((drm), notice,, fmt, ##__VA_ARGS__)

drm_notice_once

#define drm_notice_once	(		drm,
			fmt,
			...
	)		__drm_printk((drm), notice, _once, fmt, ##__VA_ARGS__)

drm_printf_indent

#define drm_printf_indent	(		printer,
			indent,
			fmt,
			...
	)		drm_printf((printer), "%.*s" fmt, (indent), "\t\t\t\t\tX", ##__VA_ARGS__)

drm_printf_indent - Print to a &drm_printer stream with indentation @printer: DRM printer @indent: Tab indentation level (max 5) @fmt: Format string

drm_WARN

#define drm_WARN	(		drm,
			condition,
			format,
			arg...
	)

Value:

    WARN(condition, "%s %s: [drm] " format,             \
            dev_driver_string(__drm_to_dev(drm)),       \
            dev_name(__drm_to_dev(drm)), ## arg)

drm_warn

#define drm_warn	(		drm,
			fmt,
			...
	)		__drm_printk((drm), warn,, fmt, ##__VA_ARGS__)

DRM_WARN

#define DRM_WARN	(		fmt,
			...
	)		_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)

drm_WARN_ON

#define drm_WARN_ON	(		drm,
			x
	)

Value:

    drm_WARN((drm), (x), "%s",                  \
         "drm_WARN_ON(" __stringify(x) ")")

drm_WARN_ON_ONCE

#define drm_WARN_ON_ONCE	(		drm,
			x
	)

Value:

    drm_WARN_ONCE((drm), (x), "%s",                 \
              "drm_WARN_ON_ONCE(" __stringify(x) ")")

drm_WARN_ONCE

#define drm_WARN_ONCE	(		drm,
			condition,
			format,
			arg...
	)

Value:

    WARN_ONCE(condition, "%s %s: [drm] " format,            \
            dev_driver_string(__drm_to_dev(drm)),       \
            dev_name(__drm_to_dev(drm)), ## arg)

drm_warn_once

#define drm_warn_once	(		drm,
			fmt,
			...
	)		__drm_printk((drm), warn, _once, fmt, ##__VA_ARGS__)

DRM_WARN_ONCE

#define DRM_WARN_ONCE	(		fmt,
			...
	)		_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)

Enumeration Type Documentation

drm_debug_category

enum drm_debug_category

DOC: print

A simple wrapper for dev_printk(), seq_printf(), etc. Allows same debug code to be used for both debugfs and printk logging.

For example::

void log_some_info(struct drm_printer *p)
{
        drm_printf(p, "foo=%d\n", foo);
        drm_printf(p, "bar=%d\n", bar);
}

#ifdef CONFIG_DEBUG_FS
void debugfs_show(struct seq_file *f)
{
        struct drm_printer p = drm_seq_file_printer(f);
        log_some_info(&p);
}
#endif

void some_other_function(...)
{
        struct drm_printer p = drm_info_printer(drm->dev);
        log_some_info(&p);
}

enum drm_debug_category - The DRM debug categories

Each of the DRM debug logging macros use a specific category, and the logging is filtered by the drm.debug module parameter. This enum specifies the values for the interface.

Each DRM_DEBUG_<CATEGORY> macro logs to DRM_UT_<CATEGORY> category, except DRM_DEBUG() logs to DRM_UT_CORE.

Enabling verbose debug messages is done through the drm.debug parameter, each category being enabled by a bit:

• drm.debug=0x1 will enable CORE messages
• drm.debug=0x2 will enable DRIVER messages
• drm.debug=0x3 will enable CORE and DRIVER messages
• ...
• drm.debug=0x1ff will enable all messages

An interesting feature is that it's possible to enable verbose logging at run-time by echoing the debug value in its sysfs node::

echo 0xf > /sys/module/drm/parameters/debug

Enumerator
DRM_UT_CORE	@DRM_UT_CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
DRM_UT_DRIVER	@DRM_UT_DRIVER: Used in the vendor specific part of the driver: i915, radeon, ... macro.
DRM_UT_KMS	@DRM_UT_KMS: Used in the modesetting code.
DRM_UT_PRIME	@DRM_UT_PRIME: Used in the prime code.
DRM_UT_ATOMIC	@DRM_UT_ATOMIC: Used in the atomic code.
DRM_UT_VBL	@DRM_UT_VBL: Used for verbose debug message in the vblank code.
DRM_UT_STATE	@DRM_UT_STATE: Used for verbose atomic state debugging.
DRM_UT_LEASE	@DRM_UT_LEASE: Used in the lease code.
DRM_UT_DP	@DRM_UT_DP: Used in the DP code.
DRM_UT_DRMRES	@DRM_UT_DRMRES: Used in the drm managed resources code.

Function Documentation

__drm_printfn_coredump()

void __drm_printfn_coredump	(	struct drm_printer *	p,
		struct va_format *	vaf
	)

__drm_printfn_dbg()

void __drm_printfn_dbg	(	struct drm_printer *	p,
		struct va_format *	vaf
	)

__drm_printfn_err()

void __drm_printfn_err	(	struct drm_printer *	p,
		struct va_format *	vaf
	)

__drm_printfn_info()

void __drm_printfn_info	(	struct drm_printer *	p,
		struct va_format *	vaf
	)

__drm_printfn_line()

void __drm_printfn_line	(	struct drm_printer *	p,
		struct va_format *	vaf
	)

__drm_printfn_seq_file()

void __drm_printfn_seq_file	(	struct drm_printer *	p,
		struct va_format *	vaf
	)

__drm_puts_coredump()

void __drm_puts_coredump	(	struct drm_printer *	p,
		const char *	str
	)

__drm_puts_seq_file()

void __drm_puts_seq_file	(	struct drm_printer *	p,
		const char *	str
	)

__printf() [1/5]

__printf	(	1	,
		2
	)		const

__printf() [2/5]

__printf	(	2	,
		0
	)

drm_vprintf - print to a &drm_printer stream : the &drm_printer @fmt: format string @va: the va_list

__printf() [3/5]

__printf	(	2	,
		3
	)

__printf() [4/5]

__printf	(	3	,
		4
	)		const

__printf() [5/5]

__printf	(	4	,
		5
	)

drm_print_bits()

void drm_print_bits	(	struct drm_printer *	p,
		unsigned long	value,
		const char *const	bits[],
		unsigned int	nbits
	)

drm_print_hex_dump()

void drm_print_hex_dump	(	struct drm_printer *	p,
		const char *	prefix,
		const u8 *	buf,
		size_t	len
	)

drm_print_regset32()

void drm_print_regset32	(	struct drm_printer *	p,
		struct debugfs_regset32 *	regset
	)

drm_puts()

const char void drm_puts	(	struct drm_printer *	p,
		const char *	str
	)

printfn()

p printfn	(	p	,
		&	vaf
	)

Variable Documentation

__drm_debug

unsigned long __drm_debug

extern

dev

const struct device* dev

f

const char* f

fmt

const char* fmt

format

const struct device enum drm_debug_category category const char * format

level

const char* level

va

const char va_list* va

Initial value:

{
    struct va_format vaf = { .fmt = fmt, .va = va }