From: Greg KH <gregkh@linuxfoundation.org>
To: Mario.Limonciello@dell.com
Cc: mika.westerberg@linux.intel.com, linux-usb@vger.kernel.org,
andreas.noever@gmail.com, michael.jamet@intel.com,
YehezkelShB@gmail.com, rajmohan.mani@intel.com,
nicholas.johnson-opensource@outlook.com.au, lukas@wunner.de,
stern@rowland.harvard.edu, anthony.wong@canonical.com,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 17/22] thunderbolt: Add initial support for USB4
Date: Tue, 1 Oct 2019 17:22:13 +0200 [thread overview]
Message-ID: <20191001152213.GB3450435@kroah.com> (raw)
In-Reply-To: <924ce4d5862c4d859e238c0e706a3d5b@AUSX13MPC105.AMER.DELL.COM>
On Tue, Oct 01, 2019 at 02:59:06PM +0000, Mario.Limonciello@dell.com wrote:
>
>
> > -----Original Message-----
> > From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Sent: Tuesday, October 1, 2019 9:54 AM
> > To: Mika Westerberg
> > Cc: linux-usb@vger.kernel.org; Andreas Noever; Michael Jamet; Yehezkel Bernat;
> > Rajmohan Mani; Nicholas Johnson; Lukas Wunner; Alan Stern; Limonciello, Mario;
> > Anthony Wong; linux-kernel@vger.kernel.org
> > Subject: Re: [RFC PATCH 17/22] thunderbolt: Add initial support for USB4
> >
> >
> > [EXTERNAL EMAIL]
> >
> > On Tue, Oct 01, 2019 at 04:09:05PM +0300, Mika Westerberg wrote:
> > > On Tue, Oct 01, 2019 at 02:47:48PM +0200, Greg Kroah-Hartman wrote:
> > > > > - Thunderbolt Controller driver. This driver is required if you
> > > > > - want to hotplug Thunderbolt devices on Apple hardware or on PCs
> > > > > - with Intel Falcon Ridge or newer.
> > > > > + USB4 (Thunderbolt) driver. USB4 is the public spec based on
> > > > > + Thunderbolt 3 protocol. This driver is required if you want to
> > > > > + hotplug Thunderbolt and USB4 compliant devices on Apple
> > > > > + hardware or on PCs with Intel Falcon Ridge or newer.
> > > >
> > > > Wait, did "old" thunderbolt just get re-branded as USB4?
> > >
> > > Not but the driver started supporting USB4 as well :)
> > >
> > > USB4 is pretty much public spec of Thunderbolt 3 but with some
> > > differences in register layouts (this is because Thunderbolt uses some
> > > vendor specific capabilities which are now moved to more "standard"
> > > places).
> >
> > Ok, then we need to rename the Kconfig option as well, otherwise no one
> > will "know" that this changed, so they will not be prompted for it.
> >
> > > > Because if I have an "old" laptop that needs Thunderbolt support, how am
> > > > I going to know it is now called USB4 instead?
> > >
> > > Well the Kconfig option tries to have both names there:
> > >
> > > tristate "USB4 (Thunderbolt) support"
> > >
> > > and then
> > >
> > > USB4 (Thunderbolt) driver. USB4 is the public spec based on
> > > Thunderbolt 3 protocol. This driver is required if you want to hotplug
> > > Thunderbolt and USB4 compliant devices on Apple hardware or on PCs
> > > with Intel Falcon Ridge or newer.
> > >
> > > and the Kconfig option is still CONFIG_THUNDERBOLT. I know this is
> > > confusing but I don't have better ideas how we can advertise both. I
> > > borrowed this "format" from firewire.
> >
> > CONFIG_USB4 instead?
>
> How about CONFIG_USB4_PCIE?
>
> I think that will help align that certain aspects of USB4 can be built optionally.
What aspects? We don't have that here at all.
I guess the parts of USB4 that are not just this "hook up the PCIe
lane" that need to still be developed?
thanks,
greg k-h
next prev parent reply other threads:[~2019-10-01 15:22 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-01 11:38 [RFC PATCH 00/22] thunderbolt: Add support for USB4 Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 01/22] thunderbolt: Introduce tb_switch_is_icm() Mika Westerberg
2019-10-01 12:10 ` Greg Kroah-Hartman
2019-10-01 12:46 ` Mika Westerberg
2019-10-01 13:36 ` Mario.Limonciello
2019-10-01 13:48 ` Mika Westerberg
2019-10-01 13:50 ` Mario.Limonciello
2019-10-01 13:52 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 02/22] thunderbolt: Log switch route string on config read/write timeout Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 03/22] thunderbolt: Log warning if adding switch fails Mika Westerberg
2019-10-01 12:18 ` Greg Kroah-Hartman
2019-10-01 12:48 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 04/22] thunderbolt: Make tb_sw_write() take const parameter Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 05/22] thunderbolt: Add helper macros to iterate over switch ports Mika Westerberg
2019-10-02 14:17 ` Oliver Neukum
2019-10-02 14:28 ` Mika Westerberg
2019-10-06 12:15 ` Lukas Wunner
2019-10-01 11:38 ` [RFC PATCH 06/22] thunderbolt: Add support for lane bonding Mika Westerberg
2019-10-01 12:38 ` Greg Kroah-Hartman
2019-10-01 12:53 ` Mika Westerberg
2019-10-02 14:21 ` Oliver Neukum
2019-10-02 14:30 ` Mika Westerberg
2019-10-03 8:25 ` Oliver Neukum
2019-10-03 8:53 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 07/22] thunderbolt: Add default linking between ports if not provided by DROM Mika Westerberg
2019-10-01 12:39 ` Greg Kroah-Hartman
2019-10-01 13:14 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 08/22] thunderbolt: Add downstream PCIe port mappings for Alpine and Titan Ridge Mika Westerberg
2019-10-01 12:40 ` Greg Kroah-Hartman
2019-10-01 13:27 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 09/22] thunderbolt: Convert basic adapter register names to follow the USB4 spec Mika Westerberg
2019-10-01 12:41 ` Greg Kroah-Hartman
2019-10-01 13:28 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 10/22] thunderbolt: Convert PCIe adapter register names to use USB4 names Mika Westerberg
2019-10-01 12:42 ` Greg Kroah-Hartman
2019-10-01 11:38 ` [RFC PATCH 11/22] thunderbolt: Convert DP adapter register names to follow the USB4 spec Mika Westerberg
2019-10-01 12:42 ` Greg Kroah-Hartman
2019-10-01 11:38 ` [RFC PATCH 12/22] thunderbolt: Add Display Port CM handshake for Titan Ridge devices Mika Westerberg
2019-10-01 12:44 ` Greg Kroah-Hartman
2019-10-01 13:30 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 13/22] thunderbolt: Add Display Port adapter pairing and resource management Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 14/22] thunderbolt: Add bandwidth management for Display Port tunnels Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 15/22] thunderbolt: Make tb_find_port() available to other files Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 16/22] thunderbolt: Call tb_eeprom_get_drom_offset() from tb_eeprom_read_n() Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 17/22] thunderbolt: Add initial support for USB4 Mika Westerberg
2019-10-01 12:47 ` Greg Kroah-Hartman
2019-10-01 13:09 ` Mika Westerberg
2019-10-01 14:53 ` Greg Kroah-Hartman
2019-10-01 14:59 ` Mario.Limonciello
2019-10-01 15:13 ` Mika Westerberg
2019-10-01 15:22 ` Greg KH [this message]
2019-10-01 15:32 ` Mika Westerberg
2019-10-01 15:07 ` Mika Westerberg
2019-10-01 15:19 ` Greg Kroah-Hartman
2019-10-01 15:26 ` Mika Westerberg
2019-10-01 16:27 ` Oliver Neukum
2019-10-02 8:30 ` Mika Westerberg
2019-10-02 8:39 ` Greg Kroah-Hartman
2019-10-02 8:49 ` Mika Westerberg
2019-10-01 17:05 ` Mario.Limonciello
2019-10-01 18:14 ` Mario.Limonciello
2019-10-02 8:39 ` Mika Westerberg
2019-10-02 15:09 ` Mario.Limonciello
2019-10-02 15:36 ` Yehezkel Bernat
2019-10-02 16:00 ` Mario.Limonciello
2019-10-03 8:00 ` Mika Westerberg
2019-10-03 14:41 ` Mario.Limonciello
2019-10-04 7:54 ` Mika Westerberg
2019-10-04 8:07 ` Yehezkel Bernat
2019-10-04 8:19 ` Mika Westerberg
2019-10-04 11:19 ` Yehezkel Bernat
2019-10-04 14:05 ` Mario.Limonciello
2019-10-04 14:19 ` Mario.Limonciello
2019-10-04 14:21 ` Mika Westerberg
[not found] ` <1570201357.2.0@kellner.me>
2019-10-04 15:16 ` Mika Westerberg
2019-10-04 15:22 ` Christian Kellner
2019-10-02 8:34 ` Mika Westerberg
2019-10-02 15:04 ` Mario.Limonciello
2019-10-01 11:38 ` [RFC PATCH 18/22] thunderbolt: Make tb_switch_find_cap() available to other files Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 19/22] thunderbolt: Add support for Time Management Unit Mika Westerberg
2019-10-02 16:52 ` Mani, Rajmohan
2019-10-03 8:01 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 20/22] thunderbolt: Add support for USB tunnels Mika Westerberg
2019-10-03 8:42 ` Oliver Neukum
2019-10-03 8:52 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 21/22] thunderbolt: Update documentation with the USB4 information Mika Westerberg
2019-10-01 14:17 ` Mario.Limonciello
2019-10-01 14:21 ` Mika Westerberg
2019-10-01 11:38 ` [RFC PATCH 22/22] thunderbolt: Do not start firmware unless asked by the user Mika Westerberg
2019-10-01 14:43 ` Mario.Limonciello
2019-10-01 14:58 ` Mika Westerberg
2019-10-01 16:53 ` Mario.Limonciello
2019-10-02 8:48 ` Mika Westerberg
2019-10-01 12:49 ` [RFC PATCH 00/22] thunderbolt: Add support for USB4 Greg Kroah-Hartman
2019-10-01 13:42 ` Mika Westerberg
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