[PATCH v2 2/4] arm64: dts: qcom: x1e78100-t14s: add hpd gpio to LCD panel

[Christopher Obbard]

The eDP panel has an HPD GPIO. Describe it in the devicetree.

Unfortunately I cannot test this on the non-OLED model since I
only have access to the model with OLED (which also uses the
HPD GPIO).

I believe this could be split into two patches; one adding the
pinctrl node and one adding the hpd gpio to the T14s devicetree.
But I will wait for your comments on this ;-).

Signed-off-by: Christopher Obbard <christopher.obb...@linaro.org>
---
 arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi 
b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
index 
962fb050c55c4fd33f480a21a8c47a484d0c82b8..46c73f5c039ed982b553636cf8c4237a20ba7687
 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
@@ -980,8 +980,12 @@ &mdss_dp3 {
        aux-bus {
                panel: panel {
                        compatible = "edp-panel";
+                       hpd-gpios = <&tlmm 119 GPIO_ACTIVE_HIGH>;
                        power-supply = <&vreg_edp_3p3>;
 
+                       pinctrl-0 = <&edp_hpd_n_default>;
+                       pinctrl-names = "default";
+
                        port {
                                edp_panel_in: endpoint {
                                        remote-endpoint = <&mdss_dp3_out>;
@@ -1286,6 +1290,13 @@ hall_int_n_default: hall-int-n-state {
                bias-disable;
        };
 
+       edp_hpd_n_default: edp-hpd-n-state {
+               pins = "gpio119";
+               function = "gpio";
+               drive-strength = <2>;
+               bias-pull-up;
+       };
+
        pcie4_default: pcie4-default-state {
                clkreq-n-pins {
                        pins = "gpio147";

-- 
2.49.0