John Zhao has uploaded a new patch set (#4) to the change originally created by Brandon Breitenstein. ( https://review.coreboot.org/c/coreboot/+/48630 )
Change subject: WIP: drivers/intel/usb4/iretimer: Enable retimer FW upgrade mux interaction ......................................................................
WIP: drivers/intel/usb4/iretimer: Enable retimer FW upgrade mux interaction
In order to update the BB retimers for usb4/tbt they need to be turned on and in a specific mode. Expanding the current DSM to allow for the use of an EC RAM Byte to get the current state of each port and wether or not it has a retimer. It also allows Kernel to issue a state for the retimer to be put into for firmware updates.
Change-Id: I768cfb56790049c231173b0ea0f8e08fe6b64b93 Signed-off-by: Brandon Breitenstein brandon.breitenstein@intel.com --- M src/drivers/intel/usb4/retimer/retimer.c M src/ec/google/chromeec/acpi/emem.asl 2 files changed, 39 insertions(+), 2 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/48630/4