[PATCH v4 2/3] printf: add tests for generic FourCCs

Aditya Garg
2025-04-08T06:48:45Z

From: Aditya Garg <gargaditya08@live.com>

This patch adds support for kunit tests of generic 32-bit FourCCs added to
vsprintf.

Acked-by: Tamir Duberstein <tamird@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Aditya Garg <gargaditya08@live.com>
---
lib/tests/printf_kunit.c | 39 ++++++++++++++++++++++++++++++++-------
1 file changed, 32 insertions(+), 7 deletions(-)

diff --git a/lib/tests/printf_kunit.c b/lib/tests/printf_kunit.c
index 2c9f6170b..b1fa0dcea 100644
--- a/lib/tests/printf_kunit.c
+++ b/lib/tests/printf_kunit.c
@@ -701,21 +701,46 @@ static void fwnode_pointer(struct kunit *kunittest)
software_node_unregister_node_group(group);
}

+struct fourcc_struct {
+ u32 code;
+ const char *str;
+};
+
+static void fourcc_pointer_test(struct kunit *kunittest, const struct fourcc_struct *fc,
+ size_t n, const char *fmt)
+{
+ size_t i;
+
+ for (i = 0; i < n; i++)
+ test(fc[i].str, fmt, &fc[i].code);
+}
+
static void fourcc_pointer(struct kunit *kunittest)
{
- struct {
- u32 code;
- char *str;
- } const try[] = {
+ static const struct fourcc_struct try_cc[] = {
{ 0x3231564e, "NV12 little-endian (0x3231564e)", },
{ 0xb231564e, "NV12 big-endian (0xb231564e)", },
{ 0x10111213, ".... little-endian (0x10111213)", },
{ 0x20303159, "Y10 little-endian (0x20303159)", },
};
- unsigned int i;
+ static const struct fourcc_struct try_ch[] = {
+ { 0x41424344, "ABCD (0x41424344)", },
+ };
+ static const struct fourcc_struct try_cn[] = {
+ { 0x41424344, "DCBA (0x44434241)", },
+ };
+ static const struct fourcc_struct try_cl[] = {
+ { (__force u32)cpu_to_le32(0x41424344), "ABCD (0x41424344)", },
+ };
+ static const struct fourcc_struct try_cb[] = {
+ { (__force u32)cpu_to_be32(0x41424344), "ABCD (0x41424344)", },
+ };

- for (i = 0; i < ARRAY_SIZE(try); i++)
- test(try[i].str, "%p4cc", &try[i].code);
+ fourcc_pointer_test(kunittest, try_cc, ARRAY_SIZE(try_cc), "%p4cc");
+ fourcc_pointer_test(kunittest, try_ch, ARRAY_SIZE(try_ch), "%p4ch");
+ fourcc_pointer_test(kunittest, try_cn, ARRAY_SIZE(try_cn), "%p4cn");
+ fourcc_pointer_test(kunittest, try_cl, ARRAY_SIZE(try_cl), "%p4cl");
+ fourcc_pointer_test(kunittest, try_cb, ARRAY_SIZE(try_cb), "%p4cb");
}

static void
--
2.43.0