diff options
Diffstat (limited to 'drivers/gpu/drm/drm_print.c')
| -rw-r--r-- | drivers/gpu/drm/drm_print.c | 70 |
1 files changed, 63 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index a17c8a14dba4..111b932cf2a9 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -28,6 +28,7 @@ #include <stdarg.h> #include <linux/io.h> +#include <linux/moduleparam.h> #include <linux/seq_file.h> #include <linux/slab.h> @@ -35,6 +36,24 @@ #include <drm/drm_drv.h> #include <drm/drm_print.h> +/* + * __drm_debug: Enable debug output. + * Bitmask of DRM_UT_x. See include/drm/drm_print.h for details. + */ +unsigned int __drm_debug; +EXPORT_SYMBOL(__drm_debug); + +MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" +"\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" +"\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" +"\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" +"\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" +"\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" +"\t\tBit 5 (0x20) will enable VBL messages (vblank code)\n" +"\t\tBit 7 (0x80) will enable LEASE messages (leasing code)\n" +"\t\tBit 8 (0x100) will enable DP messages (displayport code)"); +module_param_named(debug, __drm_debug, int, 0600); + void __drm_puts_coredump(struct drm_printer *p, const char *str) { struct drm_print_iterator *iterator = p->arg; @@ -147,6 +166,12 @@ void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf) } EXPORT_SYMBOL(__drm_printfn_debug); +void __drm_printfn_err(struct drm_printer *p, struct va_format *vaf) +{ + pr_err("*ERROR* %s %pV", p->prefix, vaf); +} +EXPORT_SYMBOL(__drm_printfn_err); + /** * drm_puts - print a const string to a &drm_printer stream * @p: the &drm printer @@ -179,6 +204,37 @@ void drm_printf(struct drm_printer *p, const char *f, ...) } EXPORT_SYMBOL(drm_printf); +/** + * drm_print_bits - print bits to a &drm_printer stream + * + * Print bits (in flag fields for example) in human readable form. + * + * @p: the &drm_printer + * @value: field value. + * @bits: Array with bit names. + * @nbits: Size of bit names array. + */ +void drm_print_bits(struct drm_printer *p, unsigned long value, + const char * const bits[], unsigned int nbits) +{ + bool first = true; + unsigned int i; + + if (WARN_ON_ONCE(nbits > BITS_PER_TYPE(value))) + nbits = BITS_PER_TYPE(value); + + for_each_set_bit(i, &value, nbits) { + if (WARN_ON_ONCE(!bits[i])) + continue; + drm_printf(p, "%s%s", first ? "" : ",", + bits[i]); + first = false; + } + if (first) + drm_printf(p, "(none)"); +} +EXPORT_SYMBOL(drm_print_bits); + void drm_dev_printk(const struct device *dev, const char *level, const char *format, ...) { @@ -200,13 +256,13 @@ void drm_dev_printk(const struct device *dev, const char *level, } EXPORT_SYMBOL(drm_dev_printk); -void drm_dev_dbg(const struct device *dev, unsigned int category, +void drm_dev_dbg(const struct device *dev, enum drm_debug_category category, const char *format, ...) { struct va_format vaf; va_list args; - if (!(drm_debug & category)) + if (!drm_debug_enabled(category)) return; va_start(args, format); @@ -224,12 +280,12 @@ void drm_dev_dbg(const struct device *dev, unsigned int category, } EXPORT_SYMBOL(drm_dev_dbg); -void drm_dbg(unsigned int category, const char *format, ...) +void __drm_dbg(enum drm_debug_category category, const char *format, ...) { struct va_format vaf; va_list args; - if (!(drm_debug & category)) + if (!drm_debug_enabled(category)) return; va_start(args, format); @@ -241,9 +297,9 @@ void drm_dbg(unsigned int category, const char *format, ...) va_end(args); } -EXPORT_SYMBOL(drm_dbg); +EXPORT_SYMBOL(__drm_dbg); -void drm_err(const char *format, ...) +void __drm_err(const char *format, ...) { struct va_format vaf; va_list args; @@ -257,7 +313,7 @@ void drm_err(const char *format, ...) va_end(args); } -EXPORT_SYMBOL(drm_err); +EXPORT_SYMBOL(__drm_err); /** * drm_print_regset32 - print the contents of registers to a |
