diff options
| -rw-r--r-- | drivers/thunderbolt/retimer.c | 19 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.h | 5 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/thunderbolt/retimer.c b/drivers/thunderbolt/retimer.c index a273fb02a02c..47becb363ada 100644 --- a/drivers/thunderbolt/retimer.c +++ b/drivers/thunderbolt/retimer.c @@ -206,6 +206,15 @@ static void tb_retimer_set_inbound_sbtx(struct tb_port *port) { int i; + /* + * When USB4 port is online sideband communications are + * already up. + */ + if (!usb4_port_device_is_offline(port->usb4)) + return; + + tb_port_dbg(port, "enabling sideband transactions\n"); + for (i = 1; i <= TB_MAX_RETIMER_INDEX; i++) usb4_port_retimer_set_inbound_sbtx(port, i); } @@ -214,6 +223,16 @@ static void tb_retimer_unset_inbound_sbtx(struct tb_port *port) { int i; + /* + * When USB4 port is offline we need to keep the sideband + * communications up to make it possible to communicate with + * the connected retimers. + */ + if (usb4_port_device_is_offline(port->usb4)) + return; + + tb_port_dbg(port, "disabling sideband transactions\n"); + for (i = TB_MAX_RETIMER_INDEX; i >= 1; i--) usb4_port_retimer_unset_inbound_sbtx(port, i); } diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 2bda2816ff47..58df106aaa5e 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -1301,6 +1301,11 @@ struct usb4_port *usb4_port_device_add(struct tb_port *port); void usb4_port_device_remove(struct usb4_port *usb4); int usb4_port_device_resume(struct usb4_port *usb4); +static inline bool usb4_port_device_is_offline(const struct usb4_port *usb4) +{ + return usb4->offline; +} + void tb_check_quirks(struct tb_switch *sw); #ifdef CONFIG_ACPI |