proxmox-mirrors/fwupd
1
0
Fork 0
mirror of https://git.proxmox.com/git/fwupd synced 2026-03-28 23:31:42 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
3fa2df2ab3
fwupd/plugins/parade-lspcon
History
Richard Hughes c4b7f42e43 Only compress one version of the builtin-quirks 
Saving the quirks in the GResource section worked well, but it made the build
system very complicated and also meant the .data section was duplicated in
both `fwupd` and `fwupdtool` -- negating a lot of the hard-fought savings.

Simplify this feature so that we just `cat` all the quirk files together, then
gzip them into a single file. This means that at startup fwupd only needs to
check the mtime of one file, and weirdly it's actually faster to load a smaller
compressed file from disk that it is to load multiple uncompressed files.
2022-09-27 12:44:04 +01:00
..
fu-parade-lspcon-device.c parade-lspcon: Remove trivial dead init 2022-09-09 19:23:29 +01:00
fu-parade-lspcon-device.h trivial: reformat the whole tree to match new format 2021-08-24 11:18:40 -05:00
fu-plugin-parade-lspcon.c Add plugin quirk keys earlier in the startup process 2022-05-09 11:13:52 +01:00
meson.build Only compress one version of the builtin-quirks 2022-09-27 12:44:04 +01:00
parade-lspcon.quirk parade-lspcon: Simply quirk matching 2022-07-09 14:57:28 +01:00
README.md parade-lspcon: Simply quirk matching 2022-07-09 14:57:28 +01:00

README.md

Parade LSPCON

Introduction

This plugin updates the firmware of HDMI level shifter and protocol converter (LSPCON) devices made by Parade Technologies, such as the PS175.

These devices communicate over I²C, via either the DisplayPort aux channel or a dedicated bus- this plugin uses a dedicated bus declared by system firmware for, flashing, and reads the device firmware version from DPCD. Quirks specify the DisplayPort bus over which DPCD is read for a given system.

Firmware is stored on an external flash attached to an SPI bus on the device. The attached flash is assumed to be compatible with the W25Q20 series of devices, in particular supporting a 64k Block Erase command (0xD8) with 24-bit address and Write Enable for Volatile Status Register (0x05).

Firmware Format

The device firmware is in an unspecified binary format that is written directly to an inactive partition of the Flash attached to the device.

This plugin supports the following protocol ID:

  • com.paradetech.ps176

GUID Generation

Devices use an extra instance ID derived from SMBIOS, e.g.

  • I2C\NAME_1AF80175:00:00&FAMILY_Google_Hatch

Quirk Use

This plugin uses the following plugin-specific quirks:

ParadeLspconAuxDeviceName

The sysfs name of the drm_dp_aux_dev over which device version should be read.

Since: 1.6.2

Vendor ID security

The vendor ID is specified by system firmware (such as ACPI tables) and is part of the device's name as read from sysfs.

External Interface Access

This plugin requires access to the DisplayPort aux channel to read DPCD, such as /dev/drm_dp_aux0 as well as the i2c bus attached to the device, such as /dev/i2c-7.