Hi Douglas, Am Freitag, 8. Dezember 2023, 07:36:02 CET schrieb Douglas Gilbert: > lsucpd is a command line utility for listing USB Type-C ports, partners > and any associated PD objects. It is essentially data-mining the > /sys/class/typec and /sys/class/usb_power_delivery directories. So > lsucpd performs no magic and root permissions are not required. > > lsucpd was originally announced in this post on 28 August 2023: > https://marc.info/?l=linux-usb&m=169325926403279&w=2 > That code has been tagged as 'r0.89'. There is also a 'r0.90' tag > but it was not announced. This release is tagged as 'r0.91'. The > code is available at this git mirror at: > https://github.com/doug-gilbert/lsucpd What is the actual license? There is LICENSE (BSP-2-Clause) and COPYING (GPL-2.0-or-later). Thanks Alexander > Changelog since 0.89 [20230827] [svn: r9] > - add the first stage of JSON support > - add --pdo-snk= and --pdo-src= options to decode PDOs > - add --rdo= option to decode RDOs > - make preparations for PD revision 3.2 > > The last one is a bit optimistic as the kernel PD stack can't yet handle > the additions in PD 3.1 (e.g. fixed 28, 36 and 48 Volts, plus AVS from > 15 to 48 Volts). Recently PD 3.1 dropped all support for 3.3 to < 5 Volts. > PD 3.2 splits AVS (Adjustable Voltage Supply) into SPR (Standard Power > Range [<= 21 Volts]) and EPR (Extended ...) variants. SPR AVS is the new > one going from 9 to 20 Volts. What is the difference between AVS and PPS > (Programmable PS)? Answer: PPS does current limiting, AVS doesn't ***. > > > Note: USB TypeC/PD standards have been in place for almost 10 years > and now almost all new mobile devices use TypeC/PD . However visibility > of TypeC/PD to host operating systems is relatively new and immature. > Previously mobile devices handled TypeC/PD in their BIOS or Embedded > Controllers and left the host OS "in the dark". > Please keep this in mind if reporting issues. > > Here is a debian binary package built on Ubuntu 23.10 : > https://doug-gilbert.github.io/p/lsucpd_0.91-0.1_amd64.deb > > Here is a rpm built on Fedora 39 : > https://doug-gilbert.github.io/p/lsucpd-0.91-1.x86_64.rpm > > Doug Gilbert > > > *** "current limiting" as defined by PPS. AVS (and PPS) still does > OCP (Over Current Protection) but that is pretty brutal (i.e. > the source removes power for a few hundred milliseconds to > let the sink cool off) > > > Examples from a Thinkpad X13 Gen 3, U 23.10 lk 6.7.0-rc1 > [port0-partner: is an alternate mode DP dongle, > port1-partner: is a PD power adapter (source)] > > $ lsucpd > port0 [pd0] ====>> partner [pd3] > port1 [pd1] <<==== partner [pd2] > > $ lsucpd -c > port0 [pd0] ====>> partner [pd3] > port1 [pd1] <<==== partner [pd2] > > > pd0: has NO source-capabilities > > > > pd0: sink-capabilities: > >> 1:fixed_supply; fixed: 5.00 Volts, 3.00 Amps (op) > >> 2:variable_supply; variable: 5.00 to 20.00 Volts, 3.25 Amps (op) > >> 3:battery; battery: 5.00 to 20.00 Volts, 65.00 Watts (op) > > > > pd1: source-capabilities: > >> 1:fixed_supply; fixed: 0.00 Volts, 7.21 Amps (max) > > > > pd1: sink-capabilities: > >> 1:fixed_supply; fixed: 5.00 Volts, 3.00 Amps (op) > >> 2:variable_supply; variable: 5.00 to 20.00 Volts, 3.25 Amps (op) > >> 3:battery; battery: 5.00 to 20.00 Volts, 65.00 Watts (op) > > > > pd2: source-capabilities: > >> 1:fixed_supply; fixed: 5.00 Volts, 3.00 Amps (max) > >> 2:fixed_supply; fixed: 9.00 Volts, 3.00 Amps (max) > >> 3:fixed_supply; fixed: 12.00 Volts, 3.00 Amps (max) > >> 4:fixed_supply; fixed: 15.00 Volts, 3.00 Amps (max) > >> 5:fixed_supply; fixed: 20.00 Volts, 3.00 Amps (max) > > > > pd2: has NO sink-capabilities > > > > pd3: has NO source-capabilities > > > > pd3: has NO sink-capabilities > > $ lsucpd -ll > port0 [pd0] ====>> partner [pd3] > port1 [pd1] <<==== partner [pd2] > > > port0 [pd0]: > data_role='[host] device' > power_operation_mode='usb_power_delivery' > power_role='[source] sink' > preferred_role='' > supported_accessory_modes='none' > usb_power_delivery_revision='2.0' > usb_typec_revision='1.0' > vconn_source='no' > waiting_for_supplier='0' > port0-partner [pd3]: > accessory_mode='none' > number_of_alternate_modes='1' > supports_usb_power_delivery='yes' > usb_power_delivery_revision='0.0' > Alternate mode: /sys/class/typec/port0-partner/port0-partner.0 > active='yes' > description='DisplayPort' > mode='1' > svid='ff01' > vdo='0x00001085' > > > port1 [pd1]: > data_role='host [device]' > power_operation_mode='usb_power_delivery' > power_role='source [sink]' > preferred_role='' > supported_accessory_modes='none' > usb_power_delivery_revision='2.0' > usb_typec_revision='1.0' > vconn_source='no' > waiting_for_supplier='0' > port1-partner [pd2]: > accessory_mode='none' > supports_usb_power_delivery='yes' > usb_power_delivery_revision='0.0' > > > Note: not all that output is believable (e.g. '0.00 Volts, 7.21 Amps (max)') > so some common sense is required interpreting the output from lsucpd . -- TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany Amtsgericht München, HRB 105018 Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider http://www.tq-group.com/
