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| author |   Jani Nikula <jani.nikula@intel.com> | 2024-12-05 11:49:33 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2024-12-10 14:08:40 +0200 |
| commit | 3050c1811387af53ed6c99ac2d602f4408d41f8d (patch) | |
| tree | 3e451131f154268805a3492df32f246d05163dda | |
| parent | drm/i915/mst: add beginnings of DP MST documentation (diff) | |
| download | wireguard-linux-3050c1811387af53ed6c99ac2d602f4408d41f8d.tar.xz wireguard-linux-3050c1811387af53ed6c99ac2d602f4408d41f8d.zip | |
drm/print: add drm_print_hex_dump()
Add a helper to print a hex dump to a struct drm_printer. There's no
fancy formatting stuff, just 16 space-separated bytes per line, with an
optional prefix.
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/f650fe1ed3e3bb74760426fa7461c3b028d661fb.1733392101.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
| -rw-r--r-- | drivers/gpu/drm/drm_print.c | 23 | ||||
| -rw-r--r-- | include/drm/drm_print.h | 2 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index 08cfea04e22b..79517bd4418f 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -390,3 +390,26 @@ void drm_print_regset32(struct drm_printer *p, struct debugfs_regset32 *regset) } } EXPORT_SYMBOL(drm_print_regset32); + +/** + * drm_print_hex_dump - print a hex dump to a &drm_printer stream + * @p: The &drm_printer + * @prefix: Prefix for each line, may be NULL for no prefix + * @buf: Buffer to dump + * @len: Length of buffer + * + * Print hex dump to &drm_printer, with 16 space-separated hex bytes per line, + * optionally with a prefix on each line. No separator is added after prefix. + */ +void drm_print_hex_dump(struct drm_printer *p, const char *prefix, + const u8 *buf, size_t len) +{ + int i; + + for (i = 0; i < len; i += 16) { + int bytes_per_line = min(16, len - i); + + drm_printf(p, "%s%*ph\n", prefix ?: "", bytes_per_line, buf + i); + } +} +EXPORT_SYMBOL(drm_print_hex_dump); diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index b3906dc04388..f77fe1531cf8 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -199,6 +199,8 @@ 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) /** |