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

Paul Kocialkowski
2023-11-22T14:14:50Z

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@bootlin.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@1cb4000 {
resets = <&ccu RST_BUS_CSI>;
status = "disabled";
};
+
+ isp: isp@1cb8000 {
+ 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