Merge tag 'thunderbolt-for-v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v6.5 merge window

This includes following Thunderbolt/USB4 changes for the v6.5 merge
window:

  - Improve debug logging
  - Rework for TMU and CL states handling
  - Retimer access improvements
  - Initial support for USB4 v2 features:

    * 80G symmetric link support
    * New notifications
    * PCIe extended encapsulation
    * enhanced uni-directional TMU mode
    * CL2 link low power state
    * DisplayPort 2.x tunneling

  - Support for Intel Barlow Ridge Thunderbolt/USB4 controller
  - Minor fixes and improvements.

All these have been in linux-next with no reported issues.

* tag 'thunderbolt-for-v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (55 commits)
  thunderbolt: Add test case for 3 DisplayPort tunnels
  thunderbolt: Add DisplayPort 2.x tunneling support
  thunderbolt: Make bandwidth allocation mode function names consistent
  thunderbolt: Enable CL2 low power state
  thunderbolt: Add support for enhanced uni-directional TMU mode
  thunderbolt: Increase NVM_MAX_SIZE to support Intel Barlow Ridge controller
  thunderbolt: Move constants related to NVM into nvm.c
  thunderbolt: Limit Intel Barlow Ridge USB3 bandwidth
  thunderbolt: Add Intel Barlow Ridge PCI ID
  thunderbolt: Fix PCIe adapter capability length for USB4 v2 routers
  thunderbolt: Fix DisplayPort IN adapter capability length for USB4 v2 routers
  thunderbolt: Add two additional double words for adapters TMU for USB4 v2 routers
  thunderbolt: Enable USB4 v2 PCIe TLP/DLLP extended encapsulation
  thunderbolt: Announce USB4 v2 connection manager support
  thunderbolt: Reset USB4 v2 host router
  thunderbolt: Add the new USB4 v2 notification types
  thunderbolt: Add support for USB4 v2 80 Gb/s link
  thunderbolt: Identify USB4 v2 routers
  thunderbolt: Do not touch lane 1 adapter path config space
  thunderbolt: Ignore data CRC mismatch for USB4 routers
  ...

Author: gregkh

drivers/thunderbolt/Makefile

@@ -2,7 +2,7 @@
 obj-${CONFIG_USB4} := thunderbolt.o
 thunderbolt-objs := nhi.o nhi_ops.o ctl.o tb.o switch.o cap.o path.o tunnel.o eeprom.o
 thunderbolt-objs += domain.o dma_port.o icm.o property.o xdomain.o lc.o tmu.o usb4.o
-thunderbolt-objs += usb4_port.o nvm.o retimer.o quirks.o
+thunderbolt-objs += usb4_port.o nvm.o retimer.o quirks.o clx.o
 
 thunderbolt-${CONFIG_ACPI} += acpi.o
 thunderbolt-$(CONFIG_DEBUG_FS) += debugfs.o

drivers/thunderbolt/acpi.c

@@ -296,16 +296,15 @@ static bool tb_acpi_bus_match(struct device *dev)
 
 static struct acpi_device *tb_acpi_switch_find_companion(struct tb_switch *sw)
 {
+	struct tb_switch *parent_sw = tb_switch_parent(sw);
 	struct acpi_device *adev = NULL;
-	struct tb_switch *parent_sw;
 
 	/*
 	 * Device routers exists under the downstream facing USB4 port
 	 * of the parent router. Their _ADR is always 0.
 	 */
-	parent_sw = tb_switch_parent(sw);
 	if (parent_sw) {
-		struct tb_port *port = tb_port_at(tb_route(sw), parent_sw);
+		struct tb_port *port = tb_switch_downstream_port(sw);
 		struct acpi_device *port_adev;
 
 		port_adev = acpi_find_child_by_adr(ACPI_COMPANION(&parent_sw->dev),