John Zhao has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/68854 )
Change subject: mb/google/rex: Disable tbt_pcie_rp3 root port ......................................................................
mb/google/rex: Disable tbt_pcie_rp3 root port
Extra memory resource allocation is needed for bridge once a TBT PCIe root port is enabled to support the hot plug feature. There is report that touch screen device is not probed once all 4 ports are enabled. This change disables the tbt_pcie_rp3(00:07.3) since it is not used.
BUG=b:254207628 TEST=Booted to OS and queried input device events via evtest. Verified the touch screen ELAN6918 was shown up.
Change-Id: Ia5c1d657c0ad0482619d739f8949bc9168eac25b Signed-off-by: zhaojohn john.zhao@intel.com --- M src/mainboard/google/rex/variants/rex0/overridetree.cb 1 file changed, 20 insertions(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/54/68854/1
diff --git a/src/mainboard/google/rex/variants/rex0/overridetree.cb b/src/mainboard/google/rex/variants/rex0/overridetree.cb index 2e1c159..c13105a 100644 --- a/src/mainboard/google/rex/variants/rex0/overridetree.cb +++ b/src/mainboard/google/rex/variants/rex0/overridetree.cb @@ -138,7 +138,7 @@ device ref tbt_pcie_rp0 on end device ref tbt_pcie_rp1 on end device ref tbt_pcie_rp2 on end - device ref tbt_pcie_rp3 on end + device ref tbt_pcie_rp3 off end device ref tcss_xhci on chip drivers/usb/acpi device ref tcss_root_hub on