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 <jani.nikula@xxxxxxxxx>
---
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
