[PATCH v2] libipa: camera_sensor_helper: Add OV5675 black level

[Daniel Semkowicz]

Add black level value for OV5675 camera sensor.
According to datasheet, default value is 0x10, 10 bits width.
However, Linux kernel driver initializes black level target value
to 0x40. Set the value to the same as in kernel driver, but scaled
to 16 bits.

Signed-off-by: Daniel Semkowicz <dse at thaumatec.com>
---
 src/ipa/libipa/camera_sensor_helper.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ipa/libipa/camera_sensor_helper.cpp b/src/ipa/libipa/camera_sensor_helper.cpp
index a1339c83..29a00d7f 100644
--- a/src/ipa/libipa/camera_sensor_helper.cpp
+++ b/src/ipa/libipa/camera_sensor_helper.cpp
@@ -601,6 +601,8 @@ class CameraSensorHelperOv5675 : public CameraSensorHelper
 public:
 	CameraSensorHelperOv5675()
 	{
+		/* From Linux kernel driver: 0x40 at 10bits. */
+		blackLevel_ = 4096;
 		gainType_ = AnalogueGainLinear;
 		gainConstants_.linear = { 1, 0, 0, 128 };
 	}
-- 
2.45.2