| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106 |
- From 949807343300a75b6e7c3e47463f817a7b6bc790 Mon Sep 17 00:00:00 2001
- From: Jack Zhu <[email protected]>
- Date: Fri, 12 May 2023 18:28:40 +0800
- Subject: [PATCH 082/122] media: admin-guide: Add starfive_camss.rst for
- Starfive Camera Subsystem
- Add starfive_camss.rst file that documents the Starfive Camera
- Subsystem driver which is used for handing image sensor data.
- Signed-off-by: Jack Zhu <[email protected]>
- ---
- .../admin-guide/media/starfive_camss.rst | 57 +++++++++++++++++++
- .../media/starfive_camss_graph.dot | 16 ++++++
- .../admin-guide/media/v4l-drivers.rst | 1 +
- 3 files changed, 74 insertions(+)
- create mode 100644 Documentation/admin-guide/media/starfive_camss.rst
- create mode 100644 Documentation/admin-guide/media/starfive_camss_graph.dot
- --- /dev/null
- +++ b/Documentation/admin-guide/media/starfive_camss.rst
- @@ -0,0 +1,57 @@
- +.. 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/media/platform/
- +starfive.
- +
- +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 DPHY Receiver: receives mipi data from a MIPI camera sensor.
- +- MIPI CSIRx Controller: is responsible for handling and decoding CSI2 protocol
- + based camera sensor data stream.
- +- ISP: handles the image data streams from the MIPI CSIRx Controller.
- +- VIN(Video In): a top-level module, is responsible for controlling power
- + and clocks to other modules, dumps the input data to memory or transfers the
- + input data to ISP.
- +
- +
- +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:
- +
- +- stf_vin0_wr_video0: capture device for images directly from the VIN module.
- +- stf_vin0_isp0_video1: capture device for images without scaling.
- +
- +The driver has 3 subdevices:
- +
- +- stf_isp0: is responsible for all the isp operations.
- +- stf_vin0_wr: used to dump RAW images to memory.
- +- stf_vin0_isp0: used to capture images for the stf_vin0_isp0_video1 device.
- --- /dev/null
- +++ b/Documentation/admin-guide/media/starfive_camss_graph.dot
- @@ -0,0 +1,16 @@
- +digraph board {
- + rankdir=TB
- + n00000001 [label="{{<port0> 0} | stf_isp0\n/dev/v4l-subdev0 | {<port1> 1}}", shape=Mrecord, style=filled, fillcolor=green]
- + n00000001:port1 -> n0000000d:port0
- + n00000004 [label="{{<port0> 0} | stf_vin0_wr\n/dev/v4l-subdev1 | {<port1> 1}}", shape=Mrecord, style=filled, fillcolor=green]
- + n00000004:port1 -> n00000007 [style=bold]
- + n00000007 [label="stf_vin0_wr_video0\n/dev/video0", shape=box, style=filled, fillcolor=yellow]
- + n0000000d [label="{{<port0> 0} | stf_vin0_isp0\n/dev/v4l-subdev2 | {<port1> 1}}", shape=Mrecord, style=filled, fillcolor=green]
- + n0000000d:port1 -> n00000010 [style=bold]
- + n00000010 [label="stf_vin0_isp0_video1\n/dev/video1", shape=box, style=filled, fillcolor=yellow]
- + n00000018 [label="{{<port0> 0} | cdns_csi2rx.19800000.csi-bridge\n | {<port1> 1 | <port2> 2 | <port3> 3 | <port4> 4}}", shape=Mrecord, style=filled, fillcolor=green]
- + n00000018:port1 -> n00000004:port0 [style=dashed]
- + n00000018:port1 -> n00000001:port0
- + n00000028 [label="{{} | imx219 6-0010\n | {<port0> 0}}", shape=Mrecord, style=filled, fillcolor=green]
- + n00000028:port0 -> n00000018:port0 [style=bold]
- +}
- --- a/Documentation/admin-guide/media/v4l-drivers.rst
- +++ b/Documentation/admin-guide/media/v4l-drivers.rst
- @@ -30,5 +30,6 @@ Video4Linux (V4L) driver-specific docume
- si470x
- si4713
- si476x
- + starfive_camss
- vimc
- vivid
|
