[PATCH 04/17] media: media/test_drivers: Replace open-coded parity calculation with parity8()

Kuan-Wei Chiu
2025-02-23T16:43:40Z

Refactor parity calculations to use the standard parity8() helper. This
change eliminates redundant implementations and improves code
efficiency.

Co-developed-by: Yu-Chun Lin <eleanor15x@gmail.com>
Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com>
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
---
drivers/media/test-drivers/vivid/vivid-vbi-gen.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/media/test-drivers/vivid/vivid-vbi-gen.c b/drivers/media/test-drivers/vivid/vivid-vbi-gen.c
index 70a4024d461e..90fafa533ccd 100644
--- a/drivers/media/test-drivers/vivid/vivid-vbi-gen.c
+++ b/drivers/media/test-drivers/vivid/vivid-vbi-gen.c
@@ -5,6 +5,7 @@
* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*/

+#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ktime.h>
@@ -165,12 +166,7 @@ static const u8 vivid_cc_sequence2[30] = {

static u8 calc_parity(u8 val)
{
- unsigned i;
- unsigned tot = 0;
-
- for (i = 0; i < 7; i++)
- tot += (val & (1 << i)) ? 1 : 0;
- return val | ((tot & 1) ? 0 : 0x80);
+ return val | ((parity8(val)) ? 0 : 0x80);
}

static void vivid_vbi_gen_set_time_of_day(u8 *packet)
--
2.34.1