arm64: dts: qcom: msm8996: add second DSI interface

Add device nodes for the DSI1, second DSI interface found on
MSM8996/APQ8096 platforms. For example on db820c it is routed to the
secondary HS expansion connector.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220617103652.606250-1-dmitry.baryshkov@linaro.org

arch/arm64/boot/dts/qcom/msm8996.dtsi

@@ -848,6 +848,13 @@ mdp5_intf1_out: endpoint {
 							remote-endpoint = <&dsi0_in>;
 						};
 					};
+
+					port@2 {
+						reg = <2>;
+						mdp5_intf2_out: endpoint {
+							remote-endpoint = <&dsi1_in>;
+						};
+					};
 				};
 			};
 
@@ -917,6 +924,72 @@ dsi0_phy: dsi-phy@994400 {
 				status = "disabled";
 			};
 
+			dsi1: dsi@996000 {
+				compatible = "qcom,mdss-dsi-ctrl";
+				reg = <0x00996000 0x400>;
+				reg-names = "dsi_ctrl";
+
+				interrupt-parent = <&mdss>;
+				interrupts = <4>;
+
+				clocks = <&mmcc MDSS_MDP_CLK>,
+					 <&mmcc MDSS_BYTE1_CLK>,
+					 <&mmcc MDSS_AHB_CLK>,
+					 <&mmcc MDSS_AXI_CLK>,
+					 <&mmcc MMSS_MISC_AHB_CLK>,
+					 <&mmcc MDSS_PCLK1_CLK>,
+					 <&mmcc MDSS_ESC1_CLK>;
+				clock-names = "mdp_core",
+					      "byte",
+					      "iface",
+					      "bus",
+					      "core_mmss",
+					      "pixel",
+					      "core";
+
+				phys = <&dsi1_phy>;
+				phy-names = "dsi";
+				status = "disabled";
+
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					port@0 {
+						reg = <0>;
+						dsi1_in: endpoint {
+							remote-endpoint = <&mdp5_intf2_out>;
+						};
+					};
+
+					port@1 {
+						reg = <1>;
+						dsi1_out: endpoint {
+						};
+					};
+				};
+			};
+
+			dsi1_phy: dsi-phy@996400 {
+				compatible = "qcom,dsi-phy-14nm";
+				reg = <0x00996400 0x100>,
+				      <0x00996500 0x300>,
+				      <0x00996800 0x188>;
+				reg-names = "dsi_phy",
+					    "dsi_phy_lane",
+					    "dsi_pll";
+
+				#clock-cells = <1>;
+				#phy-cells = <0>;
+
+				clocks = <&mmcc MDSS_AHB_CLK>, <&rpmcc RPM_SMD_BB_CLK1>;
+				clock-names = "iface", "ref";
+				status = "disabled";
+			};
+
 			hdmi: hdmi-tx@9a0000 {
 				compatible = "qcom,hdmi-tx-8996";
 				reg =	<0x009a0000 0x50c>,