blob: ca42e9447c47bef136e93fe6fe09dfc551e790ce (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
.. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
================================
Starfive Camera Subsystem driver
================================
Introduction
------------
This file documents the driver for the Starfive Camera Subsystem found on
Starfive JH7110 SoC. The driver is located under drivers/staging/media/starfive/
camss.
The driver implements V4L2, Media controller and v4l2_subdev interfaces. Camera
sensor using V4L2 subdev interface in the kernel is supported.
The driver has been successfully used on the Gstreamer 1.18.5 with v4l2src
plugin.
Starfive Camera Subsystem hardware
----------------------------------
The Starfive Camera Subsystem hardware consists of::
|\ +---------------+ +-----------+
+----------+ | \ | | | |
| | | | | | | |
| MIPI |----->| |----->| ISP |----->| |
| | | | | | | |
+----------+ | | | | | Memory |
|MUX| +---------------+ | Interface |
+----------+ | | | |
| | | |---------------------------->| |
| Parallel |----->| | | |
| | | | | |
+----------+ | / | |
|/ +-----------+
- MIPI: The MIPI interface, receiving data from a MIPI CSI-2 camera sensor.
- Parallel: The parallel interface, receiving data from a parallel sensor.
- ISP: The ISP, processing raw Bayer data from an image sensor and producing
YUV frames.
Topology
--------
The media controller pipeline graph is as follows:
.. _starfive_camss_graph:
.. kernel-figure:: starfive_camss_graph.dot
:alt: starfive_camss_graph.dot
:align: center
The driver has 2 video devices:
- capture_raw: The capture device, capturing image data directly from a sensor.
- capture_yuv: The capture device, capturing YUV frame data processed by the
ISP module
The driver has 3 subdevices:
- stf_isp: is responsible for all the isp operations, outputs YUV frames.
- cdns_csi2rx: a CSI-2 bridge supporting up to 4 CSI lanes in input, and 4
different pixel streams in output.
- imx219: an image sensor, image data is sent through MIPI CSI-2.
|
