Skip to content
Commit 43d596e3 authored by Heikki Krogerus's avatar Heikki Krogerus Committed by Greg Kroah-Hartman
Browse files

usb: typec: intel_pmc_mux: Check the port status before connect



The PMC microcontroller that we use for configuration, does
not supply any status information back. For port status we
need to talk to another controller on the board called IOM
(I/O manager).

By checking the port status before configuring the muxes, we
can make sure that we do not reconfigure the port after
bootup when the system firmware (for example BIOS) has
already configured it.

Using the status information also to check if DisplayPort
HPD is still asserted when the cable plug is disconnected,
and clearing it if it is.

Signed-off-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: default avatarRajmohan Mani <rajmohan.mani@intel.com>
Reviewed-by: default avatarUtkarsh Patel <utkarsh.h.patel@intel.com>
Tested-by: default avatarUtkarsh Patel <utkarsh.h.patel@intel.com>
Link: https://lore.kernel.org/r/20200907142428.35838-2-heikki.krogerus@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5df7ef7d
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment