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32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
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From e23afbf2c7aae9264322eee8e5c72ca1887606df Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Mon, 9 Dec 2024 10:43:18 +0000
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Subject: [PATCH] media: i2c: ov9282: Correct the exposure offset
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The datasheet lists that "Maximum exposure time is frame
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length -25 row periods, where frame length is set by
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registers {0x380E, 0x380F}".
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However this driver had OV9282_EXPOSURE_OFFSET set to 12
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which allowed that restriction to be violated, and would
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result in very under-exposed images.
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Correct the offset.
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Fixes: 14ea315bbeb7 ("media: i2c: Add ov9282 camera sensor driver")
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/media/i2c/ov9282.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/media/i2c/ov9282.c
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+++ b/drivers/media/i2c/ov9282.c
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@@ -40,7 +40,7 @@
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/* Exposure control */
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#define OV9282_REG_EXPOSURE 0x3500
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#define OV9282_EXPOSURE_MIN 1
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-#define OV9282_EXPOSURE_OFFSET 12
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+#define OV9282_EXPOSURE_OFFSET 25
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#define OV9282_EXPOSURE_STEP 1
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#define OV9282_EXPOSURE_DEFAULT 0x0282
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