diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-02-21 12:11:54 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-09-03 12:06:41 +0300 |
| commit | 341d45188a7800ae3bc18558d62020787b78397e (patch) | |
| tree | 3d9b8877c304c845f3f7c94820eb7c89b0cb2a07 /drivers/thunderbolt/tb.c | |
| parent | 284652a4a49917e121277a6cacbefed9f65b94ca (diff) | |
thunderbolt: Disable lane 1 for XDomain connection
USB4 spec mandates that the lane 1 should be disabled if lanes are not
bonded. For host-to-host connections (XDomain) we don't support lane
bonding so in order to be compatible with the spec, disable lane 1 when
another host is connected.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.c')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 602e00e0b45e..214e47656be6 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -142,6 +142,12 @@ static void tb_discover_tunnels(struct tb_switch *sw) static int tb_port_configure_xdomain(struct tb_port *port) { + /* + * XDomain paths currently only support single lane so we must + * disable the other lane according to USB4 spec. + */ + tb_port_disable(port->dual_link_port); + if (tb_switch_is_usb4(port->sw)) return usb4_port_configure_xdomain(port); return tb_lc_configure_xdomain(port); @@ -153,6 +159,8 @@ static void tb_port_unconfigure_xdomain(struct tb_port *port) usb4_port_unconfigure_xdomain(port); else tb_lc_unconfigure_xdomain(port); + + tb_port_enable(port->dual_link_port); } static void tb_scan_xdomain(struct tb_port *port) |