tests/debugfs_pipe_crc: Test the read CRCs are not null

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

diff --git a/tests/debugfs_pipe_crc.c b/tests/debugfs_pipe_crc.c
index 85ca9f5..3d02554 100644 (file)
--- a/tests/debugfs_pipe_crc.c
+++ b/tests/debugfs_pipe_crc.c
@@ -184,6 +184,11 @@ static void test_read_crc(data_t *data, int pipe)
 
                igt_pipe_crc_stop(pipe_crc);
 
+               /* ensure the CRCs are not all 0s */
+               igt_assert(!igt_crc_is_null(&crcs[0]));
+               igt_assert(!igt_crc_is_null(&crcs[1]));
+               igt_assert(!igt_crc_is_null(&crcs[2]));
+
                /* and ensure that they'are all equal, we haven't changed the fb */
                igt_assert(igt_crc_equal(&crcs[0], &crcs[1]));
                igt_assert(igt_crc_equal(&crcs[1], &crcs[2]));