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| author | Gil Fine <gil.fine@linux.intel.com> | 2023-08-10 22:37:15 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2023-10-20 18:18:01 +0300 |
| commit | 81af2952e60603d12415e1a6fd200f8073a2ad8b (patch) | |
| tree | ce083f20defdfd871574df8094610906b7195cb6 /drivers/thunderbolt/tb.c | |
| parent | c4ff14436952c3d0dd05769d76cf48e73a253b48 (diff) | |
| download | linux-stable-81af2952e60603d12415e1a6fd200f8073a2ad8b.tar.gz linux-stable-81af2952e60603d12415e1a6fd200f8073a2ad8b.tar.bz2 linux-stable-81af2952e60603d12415e1a6fd200f8073a2ad8b.zip | |
thunderbolt: Add support for asymmetric link
USB4 v2 spec defines a Gen 4 link that can operate as an aggregated
symmetric (80/80G) or asymmetric (120/40G). When the link is asymmetric,
the USB4 port on one side of the link operates with three TX lanes and
one RX lane, while the USB4 port on the opposite side of the link
operates with three RX lanes and one TX lane.
Add support for the asymmetric link and provide functions that can be
used to transition the link to asymmetric and back.
Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Co-developed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/tb.c')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index a0932545f439..3d075cea296d 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -985,7 +985,7 @@ static void tb_scan_port(struct tb_port *port) } /* Enable lane bonding if supported */ - tb_switch_lane_bonding_enable(sw); + tb_switch_set_link_width(sw, TB_LINK_WIDTH_DUAL); /* Set the link configured */ tb_switch_configure_link(sw); /* @@ -1103,7 +1103,8 @@ static void tb_free_unplugged_children(struct tb_switch *sw) tb_retimer_remove_all(port); tb_remove_dp_resources(port->remote->sw); tb_switch_unconfigure_link(port->remote->sw); - tb_switch_lane_bonding_disable(port->remote->sw); + tb_switch_set_link_width(port->remote->sw, + TB_LINK_WIDTH_SINGLE); tb_switch_remove(port->remote->sw); port->remote = NULL; if (port->dual_link_port) @@ -1721,7 +1722,8 @@ static void tb_handle_hotplug(struct work_struct *work) tb_remove_dp_resources(port->remote->sw); tb_switch_tmu_disable(port->remote->sw); tb_switch_unconfigure_link(port->remote->sw); - tb_switch_lane_bonding_disable(port->remote->sw); + tb_switch_set_link_width(port->remote->sw, + TB_LINK_WIDTH_SINGLE); tb_switch_remove(port->remote->sw); port->remote = NULL; if (port->dual_link_port) @@ -2203,7 +2205,8 @@ static void tb_restore_children(struct tb_switch *sw) continue; if (port->remote) { - tb_switch_lane_bonding_enable(port->remote->sw); + tb_switch_set_link_width(port->remote->sw, + port->remote->sw->link_width); tb_switch_configure_link(port->remote->sw); tb_restore_children(port->remote->sw); |