diff options
| author | Rajmohan Mani <rajmohan.mani@intel.com> | 2021-04-01 17:42:38 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-06-01 09:53:31 +0200 |
| commit | 3fb10ea4ce86d4d06622be894099c59872e92c57 (patch) | |
| tree | 9fbeb49811791a1a415272603300868a78a65102 /drivers/thunderbolt/tb.h | |
| parent | thunderbolt: Add additional USB4 port operations for retimer access (diff) | |
| download | linux-3fb10ea4ce86d4d06622be894099c59872e92c57.tar.xz linux-3fb10ea4ce86d4d06622be894099c59872e92c57.zip | |
thunderbolt: Add support for retimer NVM upgrade when there is no link
With help from platform firmware (ACPI) it is possible to power on
retimers even when there is no USB4 link (e.g nothing is connected to
the USB4 ports). This allows us to bring the USB4 sideband up so that we
can access retimers and upgrade their NVM firmware.
If the platform has support for this, we expose two additional
attributes under USB4 ports: offline and rescan. These can be used to
bring the port offline, rescan for the retimers and put the port online
again. The retimer NVM upgrade itself works the same way than with cable
connected.
Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
Co-developed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
| -rw-r--r-- | drivers/thunderbolt/tb.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 936518adca74..341e8443a22d 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -249,11 +249,13 @@ struct tb_port { * @port: Pointer to the lane 0 adapter * @can_offline: Does the port have necessary platform support to moved * it into offline mode and back + * @offline: The port is currently in offline mode */ struct usb4_port { struct device dev; struct tb_port *port; bool can_offline; + bool offline; }; /** @@ -1017,7 +1019,7 @@ void tb_xdomain_remove(struct tb_xdomain *xd); struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link, u8 depth); -int tb_retimer_scan(struct tb_port *port); +int tb_retimer_scan(struct tb_port *port, bool add); void tb_retimer_remove_all(struct tb_port *port); static inline bool tb_is_retimer(const struct device *dev) @@ -1105,6 +1107,7 @@ static inline struct usb4_port *tb_to_usb4_port_device(struct device *dev) 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); /* Keep link controller awake during update */ #define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0) |