linux-kernel - [PATCH v2 03/16] media: i2c: ov5647: Correct minimum VBLANK value

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251118-b4-rpi-ov5647-v2-3-5e78e7cb7f9b@ideasonboard.com>
Date: Tue, 18 Nov 2025 17:32:56 +0530
From: Jai Luthra <jai.luthra@...asonboard.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Jacopo Mondi <jacopo@...ndi.org>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Naushir Patuck <naush@...pberrypi.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, 
 Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, 
 Kieran Bingham <kieran.bingham@...asonboard.com>, 
 David Plowman <david.plowman@...pberrypi.com>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Peter Robinson <pbrobinson@...il.com>, Stefan Wahren <wahrenst@....net>, 
 "Ivan T. Ivanov" <iivanov@...e.de>, 
 Jacopo Mondi <jacopo.mondi@...asonboard.com>, 
 Jai Luthra <jai.luthra@...asonboard.com>
Subject: [PATCH v2 03/16] media: i2c: ov5647: Correct minimum VBLANK value

From: David Plowman <david.plowman@...pberrypi.com>

Trial and error reveals that the minimum vblank value appears to be 24
(the OV5647 data sheet does not give any clues). This fixes streaming
lock-ups in full resolution mode.

Fixes: 2512c06441e3 ("media: ov5647: Support V4L2_CID_VBLANK control")
Signed-off-by: David Plowman <david.plowman@...pberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@...asonboard.com>
Signed-off-by: Jai Luthra <jai.luthra@...asonboard.com>
---
 drivers/media/i2c/ov5647.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c
index d9e300406f58e554de12d9062840353bdf7a226c..191954497e3dba4b1de4094b2ea1328a6e287003 100644
--- a/drivers/media/i2c/ov5647.c
+++ b/drivers/media/i2c/ov5647.c
@@ -73,7 +73,7 @@
 #define OV5647_PIXEL_ARRAY_WIDTH	2592U
 #define OV5647_PIXEL_ARRAY_HEIGHT	1944U

-#define OV5647_VBLANK_MIN		4
+#define OV5647_VBLANK_MIN		24
 #define OV5647_VTS_MAX			32767

 #define OV5647_EXPOSURE_MIN		4

-- 
2.51.1