Hello, Mark! пн, 18 мар. 2024 г. в 20:42, Mark Pearson <mpearson@xxxxxxxxx>: > > > > On Mon, Mar 18, 2024, at 3:22 PM, Yaroslav Isakov wrote: > > Hello, Mark! > > > > пн, 18 мар. 2024 г. в 19:48, Mark Pearson <mpearson@xxxxxxxxx>: > >> > >> On Thu, Feb 22, 2024, at 9:30 AM, Mark Pearson wrote: > >> > Hi, > >> > > >> Just to confirm that I've tested a trial BIOS from the FW team and it fixes the issue (shows up under /sys/class/typec > > Great to hear, thank you! > > > >> If there's anything in particular you'd like me to confirm let me know. > > > > If /sys/class/typec is populated, I think it should be enough... Just > > to double check, is /sys/class/usb_power_delivery populated, too, now? > > Yes. From my system: > > # ls /sys/class/typec > port0 port0-partner port1 > # ls /sys/class/usb_power_delivery > pd0 pd1 pd2 > Great! These are the ones I saw with my workaround, too. > > > > I also did not manage to see anything in /sys/class/usb_role or > > /sys/class/typec_mux, even with my hack - is it expected on AMD, > > because of lack of appropriate mux/role switch drivers? > > I'm not seeing anything under those with this BIOS either > > I checked on an Intel platform on my desk (P14s G3) and those aren't populated there either...so not sure this is AMD specific. > I'm being lazy and not looking at the kernel code - what would we expect to see in those entries? According to https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-usb_role, with /sys/class/usb_role, we can switch between host and device modes. My main interest there is typec_displayport driver - to be able to see altmode info (not sure, though, in which /sys directory). With my workaround, I failed to see this driver detecting my dock, so, I was wondering, if it's caused by wrong UCSI version reported, or some other driver missing (DP altmode is working with the doc, just no info from typec_displayport driver) BTW, what is the version of ucsi reported from firmware? I wonder, if it will work with this change https://lore.kernel.org/linux-usb/20240209223824.622869-1-abhishekpandit@xxxxxxxxxxxx/ > > Mark
