[PATCH i-g-t 4/6] lib: add crc comparison function without an assert

[Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>]

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
 lib/igt_debugfs.c | 17 +++++++++++++++++
 lib/igt_debugfs.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index c291ef3..a32ed78 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -252,6 +252,23 @@ bool igt_debugfs_search(const char *filename, const char *substring)
  * @a: first pipe CRC value
  * @b: second pipe CRC value
  *
+ * Compares two CRC values.
+ */
+bool igt_crc_equal(igt_crc_t *a, igt_crc_t *b)
+{
+	int i;
+
+	for (i = 0; i < a->n_words; i++)
+		if (a->crc[i] != b->crc[i])
+			return false;
+	return true;
+}
+
+/**
+ * igt_assert_crc_equal:
+ * @a: first pipe CRC value
+ * @b: second pipe CRC value
+ *
  * Compares two CRC values and fails the testcase if they don't match with
  * igt_fail(). Note that due to CRC collisions CRC based testcase can only
  * assert that CRCs match, never that they are different. Otherwise there might
diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h
index dac8413..d08fc23 100644
--- a/lib/igt_debugfs.h
+++ b/lib/igt_debugfs.h
@@ -124,6 +124,7 @@ __attribute__((warn_unused_result))
 int igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
 			  igt_crc_t **out_crcs);
 void igt_pipe_crc_collect_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out_crc);
+bool igt_crc_equal(igt_crc_t *a, igt_crc_t *b);
 
 /*
  * Drop caches
-- 
2.7.0

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