[PATCH v8 0/9] Allwinner A31/A83T MIPI CSI-2 and A31 ISP / Platform Support

[PATCH v8 0/9] Allwinner A31/A83T MIPI CSI-2 and A31 ISP / Platform Support

[Paul Kocialkowski]

This series adds platform support for the V3s/V3/S3 MIPI CSI-2 and ISP units
as well the as A83T MIPI CSI-2 unit in the respective device-trees.
Overlays for the BananaPi M3 cameras are also provided as actual users of the
camera pipeline on A83T.

The corresponding drivers and dt bindings were merged a long time ago but this
series was never actually picked up. It seems more than ready to be merged!

Changes since v7:
- Added collected review tags;
- Added interconnect properties to bindings;
- Added compatible for device-tree overlays;
- Moved mclk pin to sensor node in bpi-m3 overlays;
- Removed duplicated assigned-clocks in bpi-m3 overlays.

Changes since v6:
- Rebased on top of the latest media tree, renamed dts to dtso for overlays.

Changes since v5:
- Added BananaPi M3 camera sensor support as device-tree overlays;
- Cleaned-up OV8865 regulator definitions;
- Always declared the internal links between CSI and MIPI CSI-2 on A83T
  in device-tree.

Changes since v4:
- Removed mbus bindings patch: an equivalent change was merged;
- Added collected tags;
- Rebased on latest media tree.

Changes since v3:
- Reordered v3s mbus compatible in binding;
- Added collected tag;
- Removed rejected interconnects fix.

Changes since all-in-one v2:
- Corrected mbus index used for the interconnects;
- Used extended mbus binding and exported the DRAM clock for that;
- Reworked the description of the core openfirmware change to give
  more insight about the situation.

Paul Kocialkowski (9):
  dt-bindings: media: sun6i-a31-csi: Add optional interconnect
    properties
  dt-bindings: media: sun6i-a31-isp: Add optional interconnect
    properties
  clk: sunxi-ng: v3s: Export MBUS and DRAM clocks to the public header
  ARM: dts: sun8i: v3s: Add mbus node to represent the interconnect
  ARM: dts: sun8i: v3s: Add nodes for MIPI CSI-2 support
  ARM: dts: sun8i: v3s: Add support for the ISP
  ARM: dts: sun8i: a83t: Add MIPI CSI-2 controller node
  ARM: dts: sun8i-a83t: Add BananaPi M3 OV5640 camera overlay
  ARM: dts: sun8i-a83t: Add BananaPi M3 OV8865 camera overlay

 .../media/allwinner,sun6i-a31-csi.yaml        |   6 +
 .../media/allwinner,sun6i-a31-isp.yaml        |   6 +
 arch/arm/boot/dts/allwinner/Makefile          |   2 +
 .../sun8i-a83t-bananapi-m3-camera-ov5640.dtso | 117 +++++++++++++++++
 .../sun8i-a83t-bananapi-m3-camera-ov8865.dtso | 103 +++++++++++++++
 arch/arm/boot/dts/allwinner/sun8i-a83t.dtsi   |  43 +++++++
 arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi    | 121 ++++++++++++++++++
 drivers/clk/sunxi-ng/ccu-sun8i-v3s.h          |   4 -
 include/dt-bindings/clock/sun8i-v3s-ccu.h     |   4 +-
 9 files changed, 400 insertions(+), 6 deletions(-)
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov8865.dtso

-- 
2.49.0

[PATCH v8 1/9] dt-bindings: media: sun6i-a31-csi: Add optional interconnect properties

[Paul Kocialkowski]

An interconnect can be attached to the sun6i-a31-csi device, which is
useful to attach the dma memory offset. Add related properties.

Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
---
 .../devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
index 1aa5775ba2bc..978ef2dc0ae7 100644
--- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
+++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
@@ -40,6 +40,12 @@ properties:
   resets:
     maxItems: 1
 
+  interconnects:
+    maxItems: 1
+
+  interconnect-names:
+    const: dma-mem
+
   port:
     $ref: /schemas/graph.yaml#/$defs/port-base
     description: Parallel input port, connect to a parallel sensor
-- 
2.49.0

[PATCH v8 2/9] dt-bindings: media: sun6i-a31-isp: Add optional interconnect properties

[Paul Kocialkowski]

An interconnect can be attached to the sun6i-a31-csi device, which is
useful to attach the dma memory offset. Add related properties.

Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
---
 .../devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
index 3ea4a4290f23..c0d7accc7bbe 100644
--- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
+++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml
@@ -36,6 +36,12 @@ properties:
   resets:
     maxItems: 1
 
+  interconnects:
+    maxItems: 1
+
+  interconnect-names:
+    const: dma-mem
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 
-- 
2.49.0

[PATCH v8 3/9] clk: sunxi-ng: v3s: Export MBUS and DRAM clocks to the public header

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

In order to declare a mbus node for the v3s, expose its associated
clocks to the public header.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Acked-by: Rob Herring <robh@kernel.org>
---
 drivers/clk/sunxi-ng/ccu-sun8i-v3s.h      | 4 ----
 include/dt-bindings/clock/sun8i-v3s-ccu.h | 4 ++--
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h b/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h
index 345cdbbab362..c933ef016570 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-v3s.h
@@ -39,14 +39,10 @@
 
 /* The first bunch of module clocks are exported */
 
-#define CLK_DRAM		58
-
 /* All the DRAM gates are exported */
 
 /* Some more module clocks are exported */
 
-#define CLK_MBUS		72
-
 /* And the GPU module clock is exported */
 
 #define CLK_PLL_DDR1		74
diff --git a/include/dt-bindings/clock/sun8i-v3s-ccu.h b/include/dt-bindings/clock/sun8i-v3s-ccu.h
index c4055629c9f9..d635bffd6914 100644
--- a/include/dt-bindings/clock/sun8i-v3s-ccu.h
+++ b/include/dt-bindings/clock/sun8i-v3s-ccu.h
@@ -87,7 +87,7 @@
 #define CLK_SPI0		55
 #define CLK_USB_PHY0		56
 #define CLK_USB_OHCI0		57
-
+#define CLK_DRAM		58
 #define CLK_DRAM_VE		59
 #define CLK_DRAM_CSI		60
 #define CLK_DRAM_EHCI		61
@@ -101,7 +101,7 @@
 #define CLK_VE			69
 #define CLK_AC_DIG		70
 #define CLK_AVS			71
-
+#define CLK_MBUS		72
 #define CLK_MIPI_CSI		73
 
 /* Clocks not available on V3s */
-- 
2.49.0

[PATCH v8 4/9] ARM: dts: sun8i: v3s: Add mbus node to represent the interconnect

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

The V3s uses the mbus interconnect to provide DRAM access for a
number of blocks. The SoC can only map 2 GiB of DRAM, which is
reflected in the dma-ranges property.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Samuel Holland <samuel@sholland.org>
---
 arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
index fa54510319ac..02d6c62b3874 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
+++ b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
@@ -629,6 +629,21 @@ int_mii_phy: ethernet-phy@1 {
 			};
 		};
 
+		mbus: dram-controller@1c62000 {
+			compatible = "allwinner,sun8i-v3s-mbus";
+			reg = <0x01c62000 0x1000>,
+			      <0x01c63000 0x1000>;
+			reg-names = "mbus", "dram";
+			clocks = <&ccu CLK_MBUS>,
+				 <&ccu CLK_DRAM>,
+				 <&ccu CLK_BUS_DRAM>;
+			clock-names = "mbus", "dram", "bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			dma-ranges = <0x00000000 0x40000000 0x80000000>;
+			#interconnect-cells = <1>;
+		};
+
 		spi0: spi@1c68000 {
 			compatible = "allwinner,sun8i-h3-spi";
 			reg = <0x01c68000 0x1000>;
-- 
2.49.0

[PATCH v8 5/9] ARM: dts: sun8i: v3s: Add nodes for MIPI CSI-2 support

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

MIPI CSI-2 is supported on the V3s with an A31-based MIPI CSI-2 bridge
controller. The controller uses a separate D-PHY, which is the same
that is otherwise used for MIPI DSI, but used in Rx mode.

On the V3s, the CSI0 controller is dedicated to MIPI CSI-2 as it does
not have access to any parallel interface pins.

Add all the necessary nodes (CSI0, MIPI CSI-2 bridge and D-PHY) to
support the MIPI CSI-2 interface.

Note that a fwnode graph link is created between CSI0 and MIPI CSI-2
even when no sensor is connected. This will result in a probe failure
for the controller as long as no sensor is connected but this is fine
since no other interface is available.

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 | 71 ++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
index 02d6c62b3874..bfe02295f45d 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
+++ b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
@@ -671,6 +671,77 @@ gic: interrupt-controller@1c81000 {
 			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		csi0: camera@1cb0000 {
+			compatible = "allwinner,sun8i-v3s-csi";
+			reg = <0x01cb0000 0x1000>;
+			interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_CSI>,
+				 <&ccu CLK_CSI_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@1 {
+					reg = <1>;
+
+					csi0_in_mipi_csi2: endpoint {
+						remote-endpoint = <&mipi_csi2_out_csi0>;
+					};
+				};
+			};
+		};
+
+		mipi_csi2: csi@1cb1000 {
+			compatible = "allwinner,sun8i-v3s-mipi-csi2",
+				     "allwinner,sun6i-a31-mipi-csi2";
+			reg = <0x01cb1000 0x1000>;
+			interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_CSI>,
+				 <&ccu CLK_CSI_SCLK>;
+			clock-names = "bus", "mod";
+			resets = <&ccu RST_BUS_CSI>;
+			status = "disabled";
+
+			phys = <&dphy>;
+			phy-names = "dphy";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				mipi_csi2_in: port@0 {
+					reg = <0>;
+				};
+
+				mipi_csi2_out: port@1 {
+					reg = <1>;
+
+					mipi_csi2_out_csi0: endpoint {
+						remote-endpoint = <&csi0_in_mipi_csi2>;
+					};
+				};
+			};
+		};
+
+		dphy: d-phy@1cb2000 {
+			compatible = "allwinner,sun6i-a31-mipi-dphy";
+			reg = <0x01cb2000 0x1000>;
+			clocks = <&ccu CLK_BUS_CSI>,
+				 <&ccu CLK_MIPI_CSI>;
+			clock-names = "bus", "mod";
+			resets = <&ccu RST_BUS_CSI>;
+			allwinner,direction = "rx";
+			status = "disabled";
+			#phy-cells = <0>;
+		};
+
 		csi1: camera@1cb4000 {
 			compatible = "allwinner,sun8i-v3s-csi";
 			reg = <0x01cb4000 0x3000>;
-- 
2.49.0

[PATCH v8 6/9] ARM: dts: sun8i: v3s: Add support for the ISP

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

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 bfe02295f45d..f63534a02706 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
+++ b/arch/arm/boot/dts/allwinner/sun8i-v3s.dtsi
@@ -695,6 +695,14 @@ csi0_in_mipi_csi2: endpoint {
 						remote-endpoint = <&mipi_csi2_out_csi0>;
 					};
 				};
+
+				port@2 {
+					reg = <2>;
+
+					csi0_out_isp: endpoint {
+						remote-endpoint = <&isp_in_csi0>;
+					};
+				};
 			};
 		};
 
@@ -753,5 +761,32 @@ 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_CSI_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>;
+					};
+				};
+			};
+		};
 	};
 };
-- 
2.49.0

[PATCH v8 7/9] ARM: dts: sun8i: a83t: Add MIPI CSI-2 controller node

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

MIPI CSI-2 is supported on the A83T with a dedicated controller that
covers both the protocol and D-PHY. It is connected to the only CSI
receiver with a fwnode graph link. Note that the CSI receiver supports
both this MIPI CSI-2 source and a parallel source.

An empty port with a label for the MIPI CSI-2 sensor input is also
defined for convenience.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 arch/arm/boot/dts/allwinner/sun8i-a83t.dtsi | 43 +++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-a83t.dtsi b/arch/arm/boot/dts/allwinner/sun8i-a83t.dtsi
index 6f88d8764e6a..cc107c6030de 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/allwinner/sun8i-a83t.dtsi
@@ -1062,6 +1062,49 @@ csi: camera@1cb0000 {
 			clock-names = "bus", "mod", "ram";
 			resets = <&ccu RST_BUS_CSI>;
 			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@1 {
+					reg = <1>;
+
+					csi_in_mipi_csi2: endpoint {
+						remote-endpoint = <&mipi_csi2_out_csi>;
+					};
+				};
+			};
+		};
+
+		mipi_csi2: csi@1cb1000 {
+			compatible = "allwinner,sun8i-a83t-mipi-csi2";
+			reg = <0x01cb1000 0x1000>;
+			interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_CSI>,
+				 <&ccu CLK_CSI_SCLK>,
+				 <&ccu CLK_MIPI_CSI>,
+				 <&ccu CLK_CSI_MISC>;
+			clock-names = "bus", "mod", "mipi", "misc";
+			resets = <&ccu RST_BUS_CSI>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				mipi_csi2_in: port@0 {
+					reg = <0>;
+				};
+
+				mipi_csi2_out: port@1 {
+					reg = <1>;
+
+					mipi_csi2_out_csi: endpoint {
+						remote-endpoint = <&csi_in_mipi_csi2>;
+					};
+				};
+			};
 		};
 
 		hdmi: hdmi@1ee0000 {
-- 
2.49.0

[PATCH v8 8/9] ARM: dts: sun8i-a83t: Add BananaPi M3 OV5640 camera overlay

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Add an overlay supporting the OV5640 from the BananaPi Camera v3
peripheral board. The board has two sensors (OV5640 and OV8865)
which cannot be supported in parallel as they share the same reset
pin and the kernel currently has no support for this case.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 arch/arm/boot/dts/allwinner/Makefile          |   1 +
 .../sun8i-a83t-bananapi-m3-camera-ov5640.dtso | 117 ++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso

diff --git a/arch/arm/boot/dts/allwinner/Makefile b/arch/arm/boot/dts/allwinner/Makefile
index 7318ce6d7fa3..de13da013732 100644
--- a/arch/arm/boot/dts/allwinner/Makefile
+++ b/arch/arm/boot/dts/allwinner/Makefile
@@ -219,6 +219,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-a33-vstar.dtb \
 	sun8i-a83t-allwinner-h8homlet-v2.dtb \
 	sun8i-a83t-bananapi-m3.dtb \
+	sun8i-a83t-bananapi-m3-camera-ov5640.dtbo \
 	sun8i-a83t-cubietruck-plus.dtb \
 	sun8i-a83t-tbs-a711.dtb \
 	sun8i-h2-plus-bananapi-m2-zero.dtb \
diff --git a/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso b/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso
new file mode 100644
index 000000000000..469faf8cd2c4
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov5640.dtso
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0 OR X11
+/*
+ * Copyright 2022 Bootlin
+ * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/sun8i-a83t-ccu.h>
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	compatible = "sinovoip,bpi-m3";
+
+	/*
+	 * These regulators actually have DLDO4 tied to their EN pin, which is
+	 * described as input supply here for lack of a better representation.
+	 * Their actual supply is PS, which is always-on.
+	 */
+
+	ov5640_avdd: ov5640-avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-avdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov5640_dovdd: ov5640-dovdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-dovdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov5640_dvdd: ov5640-dvdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov5640-dvdd";
+		regulator-min-microvolt = <1500000>;
+		regulator-max-microvolt = <1500000>;
+		vin-supply = <&reg_dldo4>;
+	};
+};
+
+&csi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&csi_8bit_parallel_pins>;
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			csi_in_ov5640: endpoint {
+				remote-endpoint = <&ov5640_out_csi>;
+				bus-width = <8>;
+				data-shift = <2>;
+				hsync-active = <1>;
+				vsync-active = <1>;
+				pclk-sample = <1>;
+			};
+		};
+	};
+};
+
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pe_pins>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	ov5640: camera@3c {
+		pinctrl-names = "default";
+		pinctrl-0 = <&csi_mclk_pin>;
+
+		compatible = "ovti,ov5640";
+		reg = <0x3c>;
+
+		clocks = <&ccu CLK_CSI_MCLK>;
+		clock-names = "xclk";
+		assigned-clocks = <&ccu CLK_CSI_MCLK>;
+		assigned-clock-parents = <&osc24M>;
+		assigned-clock-rates = <24000000>;
+
+		AVDD-supply = <&ov5640_avdd>;
+		DOVDD-supply = <&ov5640_dovdd>;
+		DVDD-supply = <&ov5640_dvdd>;
+
+		powerdown-gpios = <&pio 3 15 GPIO_ACTIVE_HIGH>; /* PD15 */
+		reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
+
+		rotation = <180>;
+
+		port {
+			ov5640_out_csi: endpoint {
+				remote-endpoint = <&csi_in_ov5640>;
+				bus-width = <8>;
+				data-shift = <2>;
+				hsync-active = <1>; 
+				vsync-active = <1>;
+				pclk-sample = <1>;
+			};
+		};
+	};
+};
+
+&reg_dldo4 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+};
-- 
2.49.0

[PATCH v8 9/9] ARM: dts: sun8i-a83t: Add BananaPi M3 OV8865 camera overlay

[Paul Kocialkowski]

From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Add an overlay supporting the OV8865 from the BananaPi Camera v3
peripheral board. The board has two sensors (OV5640 and OV8865)
which cannot be supported in parallel as they share the same reset
pin and the kernel currently has no support for this case.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 arch/arm/boot/dts/allwinner/Makefile          |   1 +
 .../sun8i-a83t-bananapi-m3-camera-ov8865.dtso | 103 ++++++++++++++++++
 2 files changed, 104 insertions(+)
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov8865.dtso

diff --git a/arch/arm/boot/dts/allwinner/Makefile b/arch/arm/boot/dts/allwinner/Makefile
index de13da013732..6bfa51266445 100644
--- a/arch/arm/boot/dts/allwinner/Makefile
+++ b/arch/arm/boot/dts/allwinner/Makefile
@@ -220,6 +220,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-a83t-allwinner-h8homlet-v2.dtb \
 	sun8i-a83t-bananapi-m3.dtb \
 	sun8i-a83t-bananapi-m3-camera-ov5640.dtbo \
+	sun8i-a83t-bananapi-m3-camera-ov8865.dtbo \
 	sun8i-a83t-cubietruck-plus.dtb \
 	sun8i-a83t-tbs-a711.dtb \
 	sun8i-h2-plus-bananapi-m2-zero.dtb \
diff --git a/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov8865.dtso b/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov8865.dtso
new file mode 100644
index 000000000000..50f965741f4a
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-a83t-bananapi-m3-camera-ov8865.dtso
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0 OR X11
+/*
+ * Copyright 2022 Bootlin
+ * Author: Kévin L'hôpital <kevin.lhopital@bootlin.com>
+ * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/sun8i-a83t-ccu.h>
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	compatible = "sinovoip,bpi-m3";
+
+	/*
+	 * These regulators actually have DLDO4 tied to their EN pin, which is
+	 * described as input supply here for lack of a better representation.
+	 * Their actual supply is PS, which is always-on.
+	 */
+
+	ov8865_avdd: ov8865-avdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov8865-avdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov8865_dovdd: ov8865-dovdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov8865-dovdd";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		vin-supply = <&reg_dldo4>;
+	};
+
+	ov8865_dvdd: ov8865-dvdd {
+		compatible = "regulator-fixed";
+		regulator-name = "ov8865-dvdd";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		vin-supply = <&reg_dldo4>;
+	};
+};
+
+&csi {
+	status = "okay";
+};
+
+&i2c2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c2_pe_pins>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	ov8865: camera@36 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&csi_mclk_pin>;
+
+		compatible = "ovti,ov8865";
+		reg = <0x36>;
+
+		clocks = <&ccu CLK_CSI_MCLK>;
+		assigned-clocks = <&ccu CLK_CSI_MCLK>;
+		assigned-clock-parents = <&osc24M>;
+		assigned-clock-rates = <24000000>;
+
+		avdd-supply = <&ov8865_avdd>;
+		dovdd-supply = <&ov8865_dovdd>;
+		dvdd-supply = <&ov8865_dvdd>;
+
+		powerdown-gpios = <&pio 4 17 GPIO_ACTIVE_LOW>; /* PE17 */
+		reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
+
+		port {
+			ov8865_out_mipi_csi2: endpoint {
+				remote-endpoint = <&mipi_csi2_in_ov8865>;
+				link-frequencies = /bits/ 64 <360000000>;
+				data-lanes = <1 2 3 4>;
+			};
+		};
+	};
+};
+
+&mipi_csi2 {
+	status = "okay";
+};
+
+&mipi_csi2_in {
+	mipi_csi2_in_ov8865: endpoint {
+		remote-endpoint = <&ov8865_out_mipi_csi2>;
+		data-lanes = <1 2 3 4>;
+	};
+};
+
+&reg_dldo4 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+};
-- 
2.49.0

Re: [PATCH v8 1/9] dt-bindings: media: sun6i-a31-csi: Add optional interconnect properties

[Rob Herring (Arm)]

On Fri, 04 Jul 2025 17:46:18 +0200, Paul Kocialkowski wrote:
> An interconnect can be attached to the sun6i-a31-csi device, which is
> useful to attach the dma memory offset. Add related properties.
> 
> Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
> ---
>  .../devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml  | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

Re: [PATCH v8 2/9] dt-bindings: media: sun6i-a31-isp: Add optional interconnect properties

[Rob Herring (Arm)]

On Fri, 04 Jul 2025 17:46:19 +0200, Paul Kocialkowski wrote:
> An interconnect can be attached to the sun6i-a31-csi device, which is
> useful to attach the dma memory offset. Add related properties.
> 
> Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
> ---
>  .../devicetree/bindings/media/allwinner,sun6i-a31-isp.yaml  | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

Re: [PATCH v8 1/9] dt-bindings: media: sun6i-a31-csi: Add optional interconnect properties

[Maxime Ripard]

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Hi,

On Fri, Jul 04, 2025 at 05:46:18PM +0200, Paul Kocialkowski wrote:
> An interconnect can be attached to the sun6i-a31-csi device, which is
> useful to attach the dma memory offset. Add related properties.
> 
> Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
> ---
>  .../devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml  | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> index 1aa5775ba2bc..978ef2dc0ae7 100644
> --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> @@ -40,6 +40,12 @@ properties:
>    resets:
>      maxItems: 1
>  
> +  interconnects:
> +    maxItems: 1
> +
> +  interconnect-names:
> +    const: dma-mem
> +

Is it really optional? My experience (despite being a bit outdated by
now) was that it was required for some SoCs, and missing for others.

Maxime

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Re: [PATCH v8 1/9] dt-bindings: media: sun6i-a31-csi: Add optional interconnect properties

[Paul Kocialkowski]

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Hi Maxime,

On Wed 09 Jul 25, 09:26, Maxime Ripard wrote:
> On Fri, Jul 04, 2025 at 05:46:18PM +0200, Paul Kocialkowski wrote:
> > An interconnect can be attached to the sun6i-a31-csi device, which is
> > useful to attach the dma memory offset. Add related properties.
> > 
> > Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
> > ---
> >  .../devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml  | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> > index 1aa5775ba2bc..978ef2dc0ae7 100644
> > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> > @@ -40,6 +40,12 @@ properties:
> >    resets:
> >      maxItems: 1
> >  
> > +  interconnects:
> > +    maxItems: 1
> > +
> > +  interconnect-names:
> > +    const: dma-mem
> > +
> 
> Is it really optional? My experience (despite being a bit outdated by
> now) was that it was required for some SoCs, and missing for others.

My understanding of the current stituation is that devices with the
interconnects property will get the dma offset from it while others
will have it set via sunxi_mbus' notifier. So in practice the
interconnects property is not required.

Currently the A83T and V3s/V3/S3 have sun6i-a31-csi devices declared in
their device-trees without the property. So I'm not sure if this still
allows us to add a mandatory property that may not always be present.

It should definitely be added (along with a mbus node) to existing users
though.

So all in all I think it makes more sense to not mark it as mandatory.

All the best,

Paul

-- 
Paul Kocialkowski,

Independent contractor - sys-base - https://www.sys-base.io/
Free software developer - https://www.paulk.fr/

Expert in multimedia, graphics and embedded hardware support with Linux.

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