Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:		/sys/bus/pci/drivers/xhci_hcd/.../dbc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:		June 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) Contact:	Lu Baolu <baolu.lu@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 		xHCI compatible USB host controllers (i.e. super-speed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 		USB3 controllers) are often implemented with the Debug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 		Capability (DbC). It can present a debug device which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 		is fully compliant with the USB framework and provides
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 		the equivalent of a very high performance full-duplex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 		serial link for debug purpose.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 		The DbC debug device shares a root port with xHCI host.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		When the DbC is enabled, the root port will be assigned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		to the Debug Capability. Otherwise, it will be assigned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		to xHCI.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		Writing "enable" to this attribute will enable the DbC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		functionality and the shared root port will be assigned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		to the DbC device. Writing "disable" to this attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		will disable the DbC functionality and the shared root
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		port will roll back to the xHCI.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		Reading this attribute gives the state of the DbC. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		can be one of the following states: disabled, enabled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		initialized, connected, configured and stalled.