We can simply sscanf the crc in one go. Also split up the igt asserts to
get better details about what went wrong.

Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
 tests/kms_sink_crc_basic.c | 36 ++++++++++--------------------------
 1 file changed, 10 insertions(+), 26 deletions(-)

diff --git a/tests/kms_sink_crc_basic.c b/tests/kms_sink_crc_basic.c
index e47b8b513393..9fac958f2142 100644
--- a/tests/kms_sink_crc_basic.c
+++ b/tests/kms_sink_crc_basic.c
@@ -62,40 +62,24 @@ static void get_crc(char *crc) {
        igt_assert(strcmp(crc, CRC_BLACK) != 0);
 }
 
-static void assert_color(char *crc, enum color color)
+static void assert_color(const char *crc, enum color color)
 {
-       char color_mask[5] = "FFFF\0";
-       char rs[5], gs[5], bs[5];
-       unsigned int rh, gh, bh, mask;
+       unsigned int r, g, b;
        int ret;
 
-       sscanf(color_mask, "%4x", &mask);
-
-       memcpy(rs, &crc[0], 4);
-       rs[4] = '\0';
-       ret = sscanf(rs, "%4x", &rh);
-       igt_require(ret > 0);
-
-       memcpy(gs, &crc[4], 4);
-       gs[4] = '\0';
-       ret = sscanf(gs, "%4x", &gh);
-       igt_require(ret > 0);
-
-       memcpy(bs, &crc[8], 4);
-       bs[4] = '\0';
-       ret = sscanf(bs, "%4x", &bh);
-       igt_require(ret > 0);
+       ret = sscanf(crc, "%4x%4x%4x", &r, &g, &b);
+       igt_assert_eq(ret, 3);
 
        switch (color) {
        case RED:
-               igt_assert((rh & mask) != 0 &&
-                          (gh & mask) == 0 &&
-                          (bh & mask) == 0);
+               igt_assert_lt(0, r);
+               igt_assert_eq(0, g);
+               igt_assert_eq(0, b);
                break;
        case GREEN:
-               igt_assert((rh & mask) == 0 &&
-                          (gh & mask) != 0 &&
-                          (bh & mask) == 0);
+               igt_assert_eq(0, r);
+               igt_assert_lt(0, g);
+               igt_assert_eq(0, b);
                break;
        default:
                igt_fail(IGT_EXIT_FAILURE);
-- 
2.1.4

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