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fwupd/plugins/synaptics-mst
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Mario Limonciello 838ae163e3 dell-dock: prevent updates to occur via synaptics-mst plugin 
Although they normally work, some failures have been reported in the field
related to the MST hub not responding in the MST plugin.

When these failures have occurred the dell_dock plugin also fails to
enumerate.

So rather than allow some people who don't have dell_dock compiled to
update their MST hub using synaptics_mst, perform ALL updates for
mst hub via dell_dock.

```
18:06:24:0324 FuPluginSynapticsMST no device found on drm_dp_aux1: VMM5331 inside Dell dock is only supported by dell_dock
```
2020-05-28 08:59:07 -05:00
..
tests trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
fu-plugin-synaptics-mst.c Introduce a new flag skips-restart 2020-05-06 15:13:40 -05:00
fu-self-test.c synaptics-mst: Skip self tests for systems with amdgpu 2020-01-08 08:44:01 +00:00
fu-synaptics-mst-common.c trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
fu-synaptics-mst-common.h trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
fu-synaptics-mst-connection.c trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
fu-synaptics-mst-connection.h trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
fu-synaptics-mst-device.c dell-dock: prevent updates to occur via synaptics-mst plugin 2020-05-28 08:59:07 -05:00
fu-synaptics-mst-device.h trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
meson.build trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
README.md trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
synaptics-mst-evb.quirk trivial: rename synapticsmst to synaptics-mst 2019-12-12 13:59:41 -06:00
synaptics-mst.quirk dell-dock: prevent updates to occur via synaptics-mst plugin 2020-05-28 08:59:07 -05:00

README.md

Synaptics MST

This plugin supports querying and flashing Synaptics MST hubs used in Dell systems and docks.

Firmware Format

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

This plugin supports the following protocol ID:

  • com.synaptics.mst

GUID Generation

These devices use custom GUID values, e.g.

  • MST-$(device_kind)-$(chip-ID)-$(board-ID)
  • MST-$(device_kind)-$(board-ID)
  • MST-$(device_kind)

Please refer to the plugin source for more details about how the GUID is constructed for specific hardware.

Vendor ID Security

The vendor ID is set from the PCI vendor, for example set to DRM_DP_AUX_DEV:0x$(vid)

Requirements

(Kernel) DP Aux Interface

Kernel 4.6 introduced an DRM DP Aux interface for manipulation of the registers needed to access an MST hub. This patch can be backported to earlier kernels: e94cb37b34

libsmbios

At compilation time and runtime you will need libsmbios_c version 2.3.0 or later

If you don't want or need this functionality you can use the --disable-dell option.

Usage

Supported devices will be displayed in # fwupdmgr get-devices output.

Here is an example output from a Dell WD15 dock:

Dell WD15/TB16 wired Dock Synaptics VMM3332
  Guid:                 653cd006-5433-57db-8632-0413af4d3fcc
  DeviceID:             MST-1-1-0-0
  Plugin:               synaptics_mst
  Flags:                allow-online
  Version:              3.10.002
  Created:              2017-01-13
  Modified:             2017-01-13
  Trusted:              none

Payloads can be flashed just like any other plugin from LVFS.

Supported devices

Not all Dell systems or accessories contain MST hubs. Here is a sample list of systems known to support them however:

  • Dell WD15 dock
  • Dell TB16 dock
  • Dell TB18DC
  • Latitude E5570
  • Latitude E5470
  • Latitude E5270
  • Latitude E7470
  • Latitude E7270
  • Latitude E7450
  • Latitude E7250
  • Latitude E5550
  • Latitude E5450
  • Latitude E5250
  • Latitude Rugged 5414
  • Latitude Rugged 7214
  • Latitude Rugged 7414