From: Martin Bugge <marbugge@cisco.com>
Date: Wed, 14 Aug 2013 12:25:48 +0000 (-0300)
Subject: [media] adv7604: corrected edid crc-calculation
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=350a1815ded7debd6053da22cd75379c95c8ca4e;p=openwrt%2Fstaging%2Fblogic.git

[media] adv7604: corrected edid crc-calculation

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Reviewed-by: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
---

diff --git a/drivers/media/i2c/ad9389b.c b/drivers/media/i2c/ad9389b.c
index 545aabbdae68..d78fd3d634ac 100644
--- a/drivers/media/i2c/ad9389b.c
+++ b/drivers/media/i2c/ad9389b.c
@@ -983,12 +983,12 @@ static void ad9389b_check_monitor_present_status(struct v4l2_subdev *sd)
 
 static bool edid_block_verify_crc(u8 *edid_block)
 {
-	int i;
 	u8 sum = 0;
+	int i;
 
-	for (i = 0; i < 127; i++)
-		sum += *(edid_block + i);
-	return ((255 - sum + 1) == edid_block[127]);
+	for (i = 0; i < 128; i++)
+		sum += edid_block[i];
+	return sum == 0;
 }
 
 static bool edid_segment_verify_crc(struct v4l2_subdev *sd, u32 segment)