linux-kernel - [PATCH v5 2/6] arm64: dts: ti: k3-am62-main: Add node for DSS

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Date:   Wed, 9 Aug 2023 14:15:55 +0530
From:   Aradhya Bhatia <a-bhatia1@...com>
To:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Conor Dooley <conor+dt@...nel.org>,
        Will Deacon <will@...nel.org>,
        Francesco Dolcini <francesco@...cini.it>
CC:     Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel List <linux-kernel@...r.kernel.org>,
        Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Rahul T R <r-ravikumar@...com>,
        Devarsh Thakkar <devarsht@...com>,
        Jai Luthra <j-luthra@...com>,
        Jayesh Choudhary <j-choudhary@...com>,
        Aradhya Bhatia <a-bhatia1@...com>
Subject: [PATCH v5 2/6] arm64: dts: ti: k3-am62-main: Add node for DSS

Add Display SubSystem (DSS) DT node for the AM625 SoC.

The DSS supports one each of video pipeline (vid) and video-lite
pipeline (vidl1). It outputs OLDI signals on one video port (VP1) and
DPI signals on another (VP2). The video ports are connected to the
pipelines via 2 identical overlay managers (ovr1 and ovr2).

Also add the DT node for DSS clock divider. This is a fixed-factor-clock
and does not have any register. This comes into effect whenenver OLDI
display is used. The input to this divider is a serial clock used by
OLDI TXes. The divider divides the input clock by 7, and provides the
pixel clock to VP1.

Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
---
 arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 25 ++++++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am62.dtsi      |  8 ++++++++
 2 files changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
index ef90b2bc81eb..7ce39c91a2af 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
@@ -717,6 +717,31 @@ cpts@...00 {
 		};
 	};
 
+	dss: dss@...00000 {
+		compatible = "ti,am625-dss";
+		reg = <0x00 0x30200000 0x00 0x1000>, /* common */
+		      <0x00 0x30202000 0x00 0x1000>, /* vidl1 */
+		      <0x00 0x30206000 0x00 0x1000>, /* vid */
+		      <0x00 0x30207000 0x00 0x1000>, /* ovr1 */
+		      <0x00 0x30208000 0x00 0x1000>, /* ovr2 */
+		      <0x00 0x3020a000 0x00 0x1000>, /* vp1: Used for OLDI */
+		      <0x00 0x3020b000 0x00 0x1000>; /* vp2: Used as DPI Out */
+		reg-names = "common", "vidl1", "vid",
+			    "ovr1", "ovr2", "vp1", "vp2";
+		power-domains = <&k3_pds 186 TI_SCI_PD_EXCLUSIVE>;
+		clocks = <&k3_clks 186 6>,
+			 <&dss_vp1_clk>,
+			 <&k3_clks 186 2>;
+		clock-names = "fck", "vp1", "vp2";
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		status = "disabled";
+
+		dss_ports: ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	hwspinlock: spinlock@...00000 {
 		compatible = "ti,am64-hwspinlock";
 		reg = <0x00 0x2a000000 0x00 0x1000>;
diff --git a/arch/arm64/boot/dts/ti/k3-am62.dtsi b/arch/arm64/boot/dts/ti/k3-am62.dtsi
index 5e72c445f37a..11f14eef2d44 100644
--- a/arch/arm64/boot/dts/ti/k3-am62.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62.dtsi
@@ -102,6 +102,14 @@ cbass_wakeup: bus@...000 {
 		};
 	};
 
+	dss_vp1_clk: clock-divider-oldi {
+		compatible = "fixed-factor-clock";
+		clocks = <&k3_clks 186 0>;
+		#clock-cells = <0>;
+		clock-div = <7>;
+		clock-mult = <1>;
+	};
+
 	#include "k3-am62-thermal.dtsi"
 };
 
-- 
2.40.1