Re: [PATCH 0/5] thunderbolt: Add support for XDomain lane bonding

[Mika Westerberg <mika.westerberg@linux.intel.com>]

On Tue, Apr 26, 2022 at 02:25:35PM +0300, Mika Westerberg wrote:
> Hi all,
> 
> So far connecting two Thunderbolt/USB4 domains (hosts) the high-speed link
> has been using a single lane. The reason for this was simplicity and also
> the fact that the host DMA was not able to go over the 20 Gbit/s even if
> the lanes were bonded. However, Intel Alder Lake and beyond actually can go
> higher than that so now it makes more sense to take advantage of the lane
> bonding. The USB4 Inter-Domain Service specification describes the
> protocol and this patch series implements it for the Linux Thunderbolt/USB4
> driver.
> 
> If both sides (hosts) of the link announce supporting this, we will
> establish bonded link. This is only possible on systems with software based
> connection manager (so Intel Alder Lake and beyond).
> 
> Mika Westerberg (5):
>   thunderbolt: Add debug logging when lane is enabled/disabled
>   thunderbolt: Move tb_port_state() prototype to correct place
>   thunderbolt: Split setting link width and lane bonding into own functions
>   thunderbolt: Ignore port locked error in tb_port_wait_for_link_width()
>   thunderbolt: Add support for XDomain lane bonding

Series applied to thunderbolt.git/next.