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Diffstat (limited to 'Documentation/userspace-api/media/drivers/camera-sensor.rst')
| -rw-r--r-- | Documentation/userspace-api/media/drivers/camera-sensor.rst | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/Documentation/userspace-api/media/drivers/camera-sensor.rst b/Documentation/userspace-api/media/drivers/camera-sensor.rst index 919a50e8b9d9..75fd9166383f 100644 --- a/Documentation/userspace-api/media/drivers/camera-sensor.rst +++ b/Documentation/userspace-api/media/drivers/camera-sensor.rst @@ -10,11 +10,13 @@ used to control the camera sensor drivers. You may also find :ref:`media_writing_camera_sensor_drivers` useful. -Frame size ----------- +Sensor internal pipeline configuration +-------------------------------------- -There are two distinct ways to configure the frame size produced by camera -sensors. +Camera sensors have an internal processing pipeline including cropping and +binning functionality. The sensor drivers belong to two distinct classes, freely +configurable and register list-based drivers, depending on how the driver +configures this functionality. Freely configurable camera sensor drivers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -26,10 +28,10 @@ of cropping and scaling operations from the device's pixel array's size. An example of such a driver is the CCS driver. -Register list based drivers +Register list-based drivers ~~~~~~~~~~~~~~~~~~~~~~~~~~~ -Register list based drivers generally, instead of able to configure the device +Register list-based drivers generally, instead of able to configure the device they control based on user requests, are limited to a number of preset configurations that combine a number of different parameters that on hardware level are independent. How a driver picks such configuration is based on the @@ -67,7 +69,7 @@ is pixels and the unit of the ``V4L2_CID_VBLANK`` is lines. The pixel rate in the sensor's **pixel array** is specified by ``V4L2_CID_PIXEL_RATE`` in the same sub-device. The unit of that control is pixels per second. -Register list based drivers need to implement read-only sub-device nodes for the +Register list-based drivers need to implement read-only sub-device nodes for the purpose. Devices that are not register list based need these to configure the device's internal processing pipeline. |