Created attachment 278257
USB PD trace
I've sniffed the USB PD communication (see attachment) that happens when
the adapter is plugged in. It goes as follows:
-> REQ Disc Ident SVID:0xff00
<- ACK Disc Ident SVID:0xff00 VDO:0x6c0005ac VDO:0x VDO:0x16570348
VDO:100a (this carries the U
Created attachment 278267
UCSI altmode support patch
The previous comment isn't entirely correct. UCSI notifications are
broken, but the command failure I quoted has nothing to do with it, it
was just an artefact. I do not know why they are broken.
It looks like the Linux UCSI driver does not sup
Created attachment 278265
UCSI trace
It looks like on XPS13, the UCSI notifications are broken. Attached is a
ftrace log that shows what happens if I enable UCSI tracing, plug in the
device, insmod ucsi_acpi, then remove the device, then plug it back in.
The ACPI notification works, but after the
Created attachment 278223
adapter firmware (TI TPS65983)
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https://bugs.launchpad.net/bugs/1726299
Title:
Apple Thunderbolt 2 to FireWire adapter not working
To manage notifications abo
OK, I desoldered the flash and dumped the firmware. The chip is indeed a
remarked TPS65983 (possibly TPS65983B, it's not entirely clear) and out
of the 1 MiB flash capacity, slightly less than 70 KiB is used by the
firmware. Which is still not very small but could be manageable. I've
attached the f
