GeoSemi GW5300 ISP V4L2 Linux driver

Introduction to GeoSemi GW5300 SoC and V4L2 driver

RidgeRun is actively working to enable customers with great software solutions on top of powerful hardware. For this reason, RidgeRun is currently working to create the V4L2 driver for GeoSemi's automotive camera video processor, the GW5300. This wiki contains a brief introduction to the GW5300 SoC and its capabilities and explores how our driver design allows for the robust integration of a wide arrange of features to fit our customers' needs. Please keep in mind that the driver can be ported to other platforms if needed. Please contact us if you require more information.

GeoSemi GW5300 device capabilites

The GW5300 is an advanced Automotive Camera Video Processor System-on-Chip (SoC) from GeoSemi, which provides a flexible and integrated camera system solution. Some of its features include:

eWARP Geometric Processor, capable of lens distortion correction, ePTZ, digital calibration, ultra-low latency (1/6th of a frame) and programmable warp maps.
HDR signal processor
Overlay Graphics Engine, including a 2D-Vector Graphics Accelerator and animated bitmap support
MIPI and parallel i/o interfaces

Supported resolutions

Resolution	Dimensions (HxV)	Frame rate [frame/s]	Number of exposures over MIPI interface
8MP30	3848 x 2166	30	1
8MP30 (DCI)	4096 x 2160	24	1
8MP30 (4k UHD)	3840 x 2160	30	1
5MP60	2592 x 1944	60	1
5MP30	2592 x 1944	30	1,2
4MP60	2688 x 1536	60	1
4MP30	2688 x 1536	30	1,2,3
2MP60	1920 x 1080	60	1,2,3,4
2MP30	1920 x 1080	30	1,2,3,4
1MP60	1280 x 720	60	1,2,3,4
1MP30	1280 x 720	30	1,2,3,4

Parallel Video Interface

16-bit video input interface.
Maximum clock speed of 150 MHz.
Input formats:
- 8/10/12-bit Bayer RGB
- 8/10-bit YUV 4:2:2 with external or embedded sync.
Resolutions:
- Pixel rate up to 150Mhz.
- Bayer RGB - 12-bit interface
  - 1080p@60fps
  - 720p@120fps
- YUV4:2:2 8/10-bit interface
  - 1080p@30fps
  - 720p@60fps

MIPI Video Interface

Two independent MIPI-Rx CSI-2 interfaces.
Max throughput: Up to 1.5Gbps/lane. 6Gbps per MIPI interface. 4.0Gbps if using dual sensors.
If capturing from 2 sensors, the stream is processed simultaneously as one picture through the ISP. The eWARP can operate on them identically or separately.
MIPI ports can be enabled individually or at the same time.
Can capture up to 4 exposures through the MIPI interface.
Input formats:
- 8/10/12/14/16/20-bit Bayer RGB (Up to 20 bit Bayer data)
- YUV 4:2:2 8/10-bits per pixel
- RGB888

API

At a software level, the GW5 establishes communication via a command API, which allows for its stand-alone operation and a modular and robust driver design, dividing operation in four different modules:

API module: customizable firmware defines a series of commands for the GW5. Such commands are formed and controlled by this module.
Communication module: an i2c module that communicates received commands from the host to the GW5.
Base module: device and system configuration.
Stream module: v4l2 device configuration and controls.

This structure allows for a very smooth integration of any additional custom features.

Features of GeoSemi GW5300 Linux driver

The following features are currently supported by our GW5300 driver. If your application requires any other feature, please contact us.

Safety monitoring

Safety monitoring tools, such as information about device status and operation, temperature and mode.
Firmware ID and build date.
Sensor information, such as ID and revision.
Register read from either the GW5 or the sensor.

ISP configuration

Our driver allows the user to perform a variety of ISP operations, as well as tune any of the dynamic parameters of the ISP configuration, including, but not limited to:

Manual and auto-exposure, sensor gain, integration lines, ISP gain, exposure ratios
HDR mode selection
Auto white balance

Ancillary data

Ancillary data can be enabled to obtain further information about the video stream, operation and overall statistics.

Warpmaps

In order to take advantage of the GW5 warpmap operation, our driver allows the user for:

Loading custom pregenerated warpmaps from host
Adjustable warpmap configuration
Warpmap source selection between embedded or external sources
ePTZ warpmap processing

Custom commands

As a result of our driver design and our firmware update process, any custom feature can be easily integrated into the driver. Please email to support@ridgerun.com for technical questions.

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