Am Dienstag, den 11.02.2020, 16:28 +0200 schrieb Heikki Krogerus: > On Tue, Feb 11, 2020 at 03:14:10PM +0100, Oliver Neukum wrote: > > Am Dienstag, den 11.02.2020, 15:59 +0200 schrieb Heikki Krogerus: > > > cat /sys/bus/acpi/devices/USBC000\:00/status > > > > Technically -ENODEV. It does not exist, even in a listing. > > But this thing definitely has a type C port. It is connected > > to a docking station which supplies the whole system with power. > > Ethernet also works. > > There is still no requirement for the BIOS or the EC firmware to > expose UCSI to the operating system. If the ACPI node is not there, > then there is no UCSI on that system. The USB Type-C connectors > function autonomously in any case on a system that exposes them to the > operating system with UCSI. UCSI is more like an optional status > interface that allows limited control over some specific things like > role swapping. > > UCSI is usually supported when the USB Power Delivery (USB PD) > controllers are connected to the Embedded Controller on the system, > but on some of our platforms they are directly connected to the SOC > instead. So on those platforms we can directly communicate with the > USB PD controller from the operating system, which is actually much > better situation compared to UCSI IMO. > > Do you have this ACPI node: INT3515 ? > > It's for the TI TPS6598x USB PD controllers. Hi, yes I got that one. Thanks for the tip. Regards Oliver
