Introduction

This plugin updates the VMM9xxxx MST devices from Synaptics.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a packed binary file format.

This plugin supports the following protocol ID:

• com.synaptics.mst-hid

GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

• USB\VID_06CB&PID_9430

These devices also use custom GUID values using the board ID and customer ID values which are different for each customer and hardware design, e.g.

• USB\VID_06CB&PID_9430&BID_56
• USB\VID_06CB&PID_9430&BID_56&CID_78

Update Behavior

The device storage banks are erased, and each block from the firmware is written and then finally activated. Calculating the CRC manually is no longer required.

Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to USB:0x06CB and also from the customer ID (if set), e.g. SYNA:0x12

Quirk Use

This plugin uses the following plugin-specific quirks:

Flags=manual-restart-required

The device is not capable of self-rebooting, and we have to ask the user to replug the power cable.

Since: 1.9.20

External Interface Access

This plugin requires read/write access to /dev/bus/usb.

Version Considerations

This plugin has been available since fwupd version 1.9.20.

Owners

Anyone can submit a pull request to modify this plugin, but the following people should be consulted before making major or functional changes:

• Apollo Ling: ApolloLing