linux-kernel - [PATCH v7 4/7] ARM: dts: sun8i: v3s: Add support for the ISP

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Message-ID: <20231122141426.329694-5-paul.kocialkowski@bootlin.com>
Date:   Wed, 22 Nov 2023 15:14:22 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Maxime Ripard <mripard@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: [PATCH v7 4/7] ARM: dts: sun8i: v3s: Add support for the ISP

The V3s (and related platforms) come with an instance of the A31 ISP.
Even though it is very close to the A31 ISP, it is not exactly
register-compatible and a dedicated compatible only is used as a
result.

Just like most other blocks of the camera pipeline, the ISP uses
the common CSI bus, module and ram clock as well as reset.

A port connection to the ISP is added to CSI0 for convenience since
CSI0 serves for MIPI CSI-2 interface support, which is likely to
receive raw data that will need to be processed by the ISP to produce
a final image.

The interconnects property is used to inherit the proper DMA offset.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
---
 arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
index d57612023aa4..1a1dcd36cba4 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
+++ b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
@@ -645,6 +645,14 @@ csi0_in_mipi_csi2: endpoint {
 						remote-endpoint = <&mipi_csi2_out_csi0>;
 					};
 				};
+
+				port@2 {
+					reg = <2>;
+
+					csi0_out_isp: endpoint {
+						remote-endpoint = <&isp_in_csi0>;
+					};
+				};
 			};
 		};
 
@@ -703,5 +711,32 @@ csi1: camera@...4000 {
 			resets = <&ccu RST_BUS_CSI>;
 			status = "disabled";
 		};
+
+		isp: isp@...8000 {
+			compatible = "allwinner,sun8i-v3s-isp";
+			reg = <0x01cb8000 0x1000>;
+			interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_CSI>,
+				 <&ccu CLK_CSI1_SCLK>,
+				 <&ccu CLK_DRAM_CSI>;
+			clock-names = "bus", "mod", "ram";
+			resets = <&ccu RST_BUS_CSI>;
+			interconnects = <&mbus 5>;
+			interconnect-names = "dma-mem";
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					isp_in_csi0: endpoint {
+						remote-endpoint = <&csi0_out_isp>;
+					};
+				};
+			};
+		};
 	};
 };
-- 
2.42.1