[PATCH RESEND 14/17] riscv: dts: spacemit: k3: add display nodes

From: Cody Kang <[email protected]>

Add the SoC-level display nodes: the two Saturn DPUs, the two DP/eDP
controllers with their PHY children.

The PHY PLLs are fed back into the APMU as pixel-clock mux parents, so
updated the &syscon_apmu node in the display dtsi.

Signed-off-by: Cody Kang <[email protected]>
---
 arch/riscv/boot/dts/spacemit/k3-display.dtsi | 156 +++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3-display.dtsi b/arch/riscv/boot/dts/spacemit/k3-display.dtsi
new file mode 100644
index 000000000000..4892ee6acda2
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k3-display.dtsi
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * SpacemiT K3 display subsystem (DPU0/eDP0 + DPU1/DP1) shared
+ * device-tree definitions for inclusion alongside k3.dtsi.
+ *
+ * Copyright (C) 2026 SpacemiT Co., Ltd.
+ */
+
+#include <dt-bindings/clock/spacemit,k3-clocks.h>
+#include <dt-bindings/reset/spacemit,k3-resets.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+&soc {
+	dpu0_crtc0: dpu@c0340000 {
+		compatible = "spacemit,k3-saturn-dpu";
+		reg = <0x0 0xc0340000 0x0 0x54000>;
+		interrupts = <90 IRQ_TYPE_LEVEL_HIGH>,
+			     <89 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "online", "offline";
+		clocks = <&syscon_apmu CLK_APMU_LCD_PXCLK>,
+			 <&syscon_apmu CLK_APMU_LCD_MCLK>,
+			 <&syscon_apmu CLK_APMU_DPU_ACLK>,
+			 <&syscon_apmu CLK_APMU_DSI_ESC>,
+			 <&syscon_apmu CLK_APMU_LCD_DSC>;
+		clock-names = "pxclk", "mclk", "aclk", "escclk", "dscclk";
+		resets = <&syscon_apmu RESET_APMU_LCD_MCLK>,
+			 <&syscon_apmu RESET_APMU_LCD>,
+			 <&syscon_apmu RESET_APMU_DSI_ESC>,
+			 <&syscon_apmu RESET_APMU_DPU_ACLK>,
+			 <&syscon_apmu RESET_APMU_LCD_DSCCLK>;
+		reset-names = "mclk", "lcd", "esc",
+			      "aclk", "dsc";
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dpu0_out: endpoint {
+					remote-endpoint = <&edp0_in>;
+				};
+			};
+		};
+	};
+
+	edp0: edp@cac84000 {
+		compatible = "spacemit,k3-inno-dp";
+		reg = <0x0 0xcac84000 0x0 0x4000>;
+		interrupts = <132 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&syscon_apmu CLK_APMU_EDP0_PXCLK>, <&edp0_phy>;
+		clock-names = "pxclk", "pll";
+		resets = <&syscon_apmu RESET_APMU_EDP0>;
+		phys = <&edp0_phy>;
+		phy-names = "dp";
+		status = "disabled";
+
+		edp0_phy: phy {
+			compatible = "spacemit,k3-inno-dp-phy";
+			#phy-cells = <0>;
+			#clock-cells = <0>;
+			clock-output-names = "edp0_pll_pxclk";
+		};
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				edp0_in: endpoint {
+					remote-endpoint = <&dpu0_out>;
+				};
+			};
+			/* port@1 (panel output) is added by boards fitting an eDP panel */
+		};
+	};
+
+	dpu1_crtc0: dpu@c0440000 {
+		compatible = "spacemit,k3-saturn-dpu";
+		reg = <0x0 0xc0440000 0x0 0x54000>;
+		interrupts = <139 IRQ_TYPE_LEVEL_HIGH>,
+			     <138 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "online", "offline";
+		clocks = <&syscon_apmu CLK_APMU_DSI4LN2_LCD_PXCLK>,
+			 <&syscon_apmu CLK_APMU_DSI4LN2_LCD_MCLK>,
+			 <&syscon_apmu CLK_APMU_DSI4LN2_DPU_ACLK>,
+			 <&syscon_apmu CLK_APMU_DSI4LN2_DSI_ESC>,
+			 <&syscon_apmu CLK_APMU_DSI4LN2_LCD_DSC>;
+		clock-names = "pxclk", "mclk", "aclk", "escclk", "dscclk";
+		resets = <&syscon_apmu RESET_APMU_DSI4LN2_LCD_MCLK>,
+			 <&syscon_apmu RESET_APMU_DSI4LN2_LCD_SW>,
+			 <&syscon_apmu RESET_APMU_DSI4LN2_ESCCLK>,
+			 <&syscon_apmu RESET_APMU_DSI4LN2_DPU_ACLK>,
+			 <&syscon_apmu RESET_APMU_DSI4LN2_LCD_DSCCLK>;
+		reset-names = "mclk", "lcd", "esc",
+			      "aclk", "dsc";
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dpu1_out: endpoint {
+					remote-endpoint = <&dp1_in>;
+				};
+			};
+		};
+	};
+
+	dp1: dp@cac88000 {
+		compatible = "spacemit,k3-inno-dp";
+		reg = <0x0 0xcac88000 0x0 0x4000>;
+		interrupts = <140 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&syscon_apmu CLK_APMU_EDP1_PXCLK>, <&dp1_phy>;
+		clock-names = "pxclk", "pll";
+		resets = <&syscon_apmu RESET_APMU_EDP1>;
+		phys = <&dp1_phy>;
+		phy-names = "dp";
+		status = "disabled";
+
+		dp1_phy: phy {
+			compatible = "spacemit,k3-inno-dp-phy";
+			#phy-cells = <0>;
+			#clock-cells = <0>;
+			clock-output-names = "edp1_pll_pxclk";
+		};
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dp1_in: endpoint {
+					remote-endpoint = <&dpu1_out>;
+				};
+			};
+			/* no port@1: the DP TX drives the external connector directly */
+		};
+	};
+};
+
+/*
+ * Feed the PHY PLL pixel clocks back in as the APMU mux parents. This lives
+ * here, not in k3.dtsi: the PHYs only exist where this file is included.
+ */
+&syscon_apmu {
+	clocks = <&osc_32k>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>,
+		 <&edp0_phy>, <&dp1_phy>;
+	clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m",
+		      "edp0_pll_pxclk", "edp1_pll_pxclk";
+};

-- 
2.43.0