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path: root/src/ipa/libipa/camera_sensor_helper.cpp
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2021-07-15libipa: Correct OV5670 CameraSensorHelper gain valuesJean-Michel Hautbois
The datasheet states that the low 7 bits are fraction bits. real_gain = GainCode/128 For example, 0x080 is 1x gain, 0x100 is 2x gain. It means that we should have m0=1 and c1=128. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-15libipa: Add CameraSensorHelper for OV13858Jean-Michel Hautbois
Extend the CameraSensorHelper factory with support for an OV13858 sensor as found in the Soraka Chromebook. The datasheet states that low 7 bits are fraction bits, so the gain is calculated as gainCode=128*gain. According to the formula, it means m0=1 and c1=128. m1 then has to be 0, and c0=0. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-09ipa: libipa: Fixups in CameraSensorHelpersJean-Michel Hautbois
A few lines needed to be wrapped under 80 lines. Remove some unneeded documentation and minor typos. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-06-28ipa: Create a camera sensor helper classJean-Michel Hautbois
For various sensor operations, it may be needed to do sensor specific computations, like analogue gain or vertical blanking. This commit introduces a new camera sensor helper in libipa which aims to solve this specific issue. It is based on the MIPI alliance Specification for Camera Command Set and implements, for now, only the analogue "Global gain" mode. Setting analogue gain for a specific sensor is not a straightforward operation, as one needs to know how the gain is calculated for it. Three helpers are created in this patch: imx219, ov5670 and ov5693. Adding a new sensor is pretty straightforward as one only needs to implement the sub-class for it and register that class to the CameraSensorHelperFactory. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>