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.
Signed-off-by: Jani Nikula <[email protected]> --- drivers/gpu/drm/drm_print.c | 23 +++++++++++++++++++++++ include/drm/drm_print.h | 2 ++ 2 files changed, 25 insertions(+) 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) /** -- 2.39.5
