From: Kuan-Wei Chiu <visitorckw@gmail.com>
Date: Thu, 15 May 2025 08:07:48 +0000 (+0800)
Subject: media: media/test_drivers: Replace open-coded parity calculation with parity8()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47e0452b40af6bf821a96e34d95fd5915fe4c7a6;p=thirdparty%2Flinux.git

media: media/test_drivers: Replace open-coded parity calculation with parity8()

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

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>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
---

diff --git a/drivers/media/test-drivers/vivid/vivid-vbi-gen.c b/drivers/media/test-drivers/vivid/vivid-vbi-gen.c
index 70a4024d461e3..e0f4151bda18a 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)