On Tue, Oct 01, 2019 at 02:17:01PM +0000, Mario.Limonciello@xxxxxxxx wrote: > > > > -----Original Message----- > > From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > > Sent: Tuesday, October 1, 2019 6:38 AM > > To: linux-usb@xxxxxxxxxxxxxxx > > Cc: Andreas Noever; Michael Jamet; Mika Westerberg; Yehezkel Bernat; Rajmohan > > Mani; Nicholas Johnson; Lukas Wunner; Greg Kroah-Hartman; Alan Stern; > > Limonciello, Mario; Anthony Wong; linux-kernel@xxxxxxxxxxxxxxx > > Subject: [RFC PATCH 21/22] thunderbolt: Update documentation with the USB4 > > information > > > > > > [EXTERNAL EMAIL] > > > > Update user's and administrator's guide to mention USB4, how it relates > > to Thunderbolt (it is public spec of Thunderbolt 3) and and how it is > > supported in Linux. > > > > Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > > --- > > Documentation/admin-guide/thunderbolt.rst | 27 ++++++++++++++++++----- > > 1 file changed, 22 insertions(+), 5 deletions(-) > > > > diff --git a/Documentation/admin-guide/thunderbolt.rst b/Documentation/admin- > > guide/thunderbolt.rst > > index 898ad78f3cc7..4cbed319133d 100644 > > --- a/Documentation/admin-guide/thunderbolt.rst > > +++ b/Documentation/admin-guide/thunderbolt.rst > > @@ -1,6 +1,25 @@ > > -============= > > - Thunderbolt > > -============= > > +====================== > > + Thunderbolt and USB4 > > +====================== > > +USB4 is the public spec of Thunderbolt 3 with some differences at the > > +register level among other things. There are two different > > +implementations available: firmware connection manager and software > > +connection manager. Typically PCs come with a firmware connection > > +manager for Thunderbolt 3 and early USB4 capable systems. Apple systems > > +on the other hand use software connection manager and the future USB4 > > +compliant PCs follow the suit. > > Future isn't going to age very well. Perhaps refer instead to "later" USB4 compliant > PCs. Yup. > Also, we should be seeing this stuff pop-up outside of PCs. So maybe better > to just call out "devices". Indeed, I'll update this accordingly.
