Both the CRD and T14s support altmode for external DisplayPort over the USB Type-C connectors. The CRD has 3 such connectors while the T14s has only 2. Enabling DP altmode requires the support for the Parade PS8830 USB Type-C retimer. [1] Currently, only the DP 4lanes and USB3 modes have been successfully tested on both CRD and T14s. The DP 2lanes + USB3 mode seems to suggest that changes are further needed in the QMP PHY driver. [1] https://lore.kernel.org/all/20240829-x1e80100-ps8830-v1-0-bcc4790b1d45@xxxxxxxxxx/ Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx> --- Abel Vesa (2): arm64: dts: qcom: x1e80100-crd: Enable external DP support arm64: dts: qcom: x1e80100-t14s: Add external DP support .../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts | 278 +++++++++++++- arch/arm64/boot/dts/qcom/x1e80100-crd.dts | 414 ++++++++++++++++++++- 2 files changed, 682 insertions(+), 10 deletions(-) --- base-commit: ecc768a84f0b8e631986f9ade3118fa37852fef0 change-id: 20240829-x1e80100-crd-dts-add-external-dp-support-8daf3a516823 Best regards, -- Abel Vesa <abel.vesa@xxxxxxxxxx>
