driver-api/media/camera-sensor.rst

1 .. SPDX-License-Identifier: GPL-2.0
6 CSI-2
7 -----
12 ---------------
14 Camera sensors have an internal clock tree including a PLL and a number of
23 elsewhere. Therefore only the pre-determined frequencies are configurable by the
26 Frame size
27 ----------
29 There are two distinct ways to configure the frame size produced by camera
36 processing pipeline as one or more sub-devices with different cropping and
46 they control based on user requests, are limited to a number of preset
47 configurations that combine a number of different parameters that on hardware
54 Frame interval configuration
55 ----------------------------
57 There are two different methods for obtaining possibilities for different frame
58 intervals as well as configuring the frame interval. Which one to implement
64 Instead of a high level parameter such as frame interval, the frame interval is
65 a result of the configuration of a number of camera sensor implementation
69 The frame interval is calculated using the following equation::
71 	frame interval = (analogue crop width + horizontal blanking) *
80 pixel rate is specified by ``V4L2_CID_PIXEL_RATE`` in the same sub-device. The
83 Register list based drivers need to implement read-only sub-device nodes for the
89 skipping, scaling or digital crop :ref:`v4l2-subdev-selections`.
95 level interface natively, generally use the concept of frame interval (or frame
98 frame interval on these devices.
101 ----------------
110 :c:type:`v4l2_subdev_core_ops`->s_power() callback for bridge or ISP drivers to
117 ``drivers/media/i2c/smiapp/smiapp-core.c``. The two drivers work in both ACPI
132 The function returns a non-zero value if it succeeded getting the power count or