This is a note to let you know that I've just added the patch titled
media: i2c: ov9282: Correct the exposure offset
to the 6.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-i2c-ov9282-correct-the-exposure-offset.patch
and it can be found in the queue-6.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 20a3bed918a475dcc16b124e33d4f6d3d110b7a0
Author: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
Date: Mon Dec 9 14:55:45 2024 +0000
media: i2c: ov9282: Correct the exposure offset
[ Upstream commit feaf4154d69657af2bf96e6e66cca794f88b1a61 ]
The datasheet lists that "Maximum exposure time is frame
length -25 row periods, where frame length is set by
registers {0x380E, 0x380F}".
However this driver had OV9282_EXPOSURE_OFFSET set to 12
which allowed that restriction to be violated, and would
result in very under-exposed images.
Correct the offset.
Fixes: 14ea315bbeb7 ("media: i2c: Add ov9282 camera sensor driver")
Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
Reviewed-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/i2c/ov9282.c b/drivers/media/i2c/ov9282.c
index 9f52af6f047f3..87e5d7ce5a47e 100644
--- a/drivers/media/i2c/ov9282.c
+++ b/drivers/media/i2c/ov9282.c
@@ -40,7 +40,7 @@
/* Exposure control */
#define OV9282_REG_EXPOSURE 0x3500
#define OV9282_EXPOSURE_MIN 1
-#define OV9282_EXPOSURE_OFFSET 12
+#define OV9282_EXPOSURE_OFFSET 25
#define OV9282_EXPOSURE_STEP 1
#define OV9282_EXPOSURE_DEFAULT 0x0282
