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media: i2c: ov9282: Correct the exposure offset

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BugLink: https://bugs.launchpad.net/bugs/2111953

[ 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: 14ea315bbe ("media: i2c: Add ov9282 camera sensor driver")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Dave Stevenson
2024-12-09 14:55:45 +00:00
committed by Mehmet Basaran
parent 4857d68144
commit 07bd1308f7
1 changed files with 1 additions and 1 deletions
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drivers/media/i2c/ov9282.c
+1 -1
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@@ -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