[PATCH v3 05/16] media: saa7115: Replace open-coded parity calculation with parity8()

Kuan-Wei Chiu <[email protected]>
Newsgroups dev.linux.lists.brcm80211,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-mtd,org.kernel.vger.bpf,org.kernel.vger.linux-input,org.kernel.vger.linux-kernel,org.kernel.vger.linux-media,org.kernel.vger.linux-serial,org.kernel.vger.linux-wireless,org.kernel.vger.netdev
Message-ID <[email protected]>
Refactor parity calculations to use the standard parity8() helper. This
change eliminates redundant implementations and improves code
efficiency.

Co-developed-by: Yu-Chun Lin <[email protected]>
Signed-off-by: Yu-Chun Lin <[email protected]>
Signed-off-by: Kuan-Wei Chiu <[email protected]>
---
 drivers/media/i2c/saa7115.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/media/i2c/saa7115.c b/drivers/media/i2c/saa7115.c
index a1c71187e773..b8b8f206ec3a 100644
--- a/drivers/media/i2c/saa7115.c
+++ b/drivers/media/i2c/saa7115.c
@@ -25,6 +25,7 @@
 
 #include "saa711x_regs.h"
 
+#include <linux/bitops.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -664,15 +665,6 @@ static const unsigned char saa7115_init_misc[] = {
 	0x00, 0x00
 };
 
-static int saa711x_odd_parity(u8 c)
-{
-	c ^= (c >> 4);
-	c ^= (c >> 2);
-	c ^= (c >> 1);
-
-	return c & 1;
-}
-
 static int saa711x_decode_vps(u8 *dst, u8 *p)
 {
 	static const u8 biphase_tbl[] = {
@@ -1227,7 +1219,7 @@ static int saa711x_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vb
 		vbi->type = V4L2_SLICED_TELETEXT_B;
 		break;
 	case 4:
-		if (!saa711x_odd_parity(p[0]) || !saa711x_odd_parity(p[1]))
+		if (!parity8(p[0]) || !parity8(p[1]))
 			return 0;
 		vbi->type = V4L2_SLICED_CAPTION_525;
 		break;
-- 
2.34.1
lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.