[PATCH v8 1/2] dt-bindings: media: Add Allwinner V3s Camera Sensor Interface (CSI)

[PATCH v8 1/2] dt-bindings: media: Add Allwinner V3s Camera Sensor Interface (CSI)

[Yong Deng]

Add binding documentation for Allwinner V3s CSI.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yong Deng <yong.deng@magewell.com>
---
 .../devicetree/bindings/media/sun6i-csi.txt        | 59 ++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/sun6i-csi.txt

diff --git a/Documentation/devicetree/bindings/media/sun6i-csi.txt b/Documentation/devicetree/bindings/media/sun6i-csi.txt
new file mode 100644
index 000000000000..2ff47a9507a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/sun6i-csi.txt
@@ -0,0 +1,59 @@
+Allwinner V3s Camera Sensor Interface
+-------------------------------------
+
+Allwinner V3s SoC features two CSI module. CSI0 is used for MIPI CSI-2
+interface and CSI1 is used for parallel interface.
+
+Required properties:
+  - compatible: value must be "allwinner,sun8i-v3s-csi"
+  - reg: base address and size of the memory-mapped region.
+  - interrupts: interrupt associated to this IP
+  - clocks: phandles to the clocks feeding the CSI
+    * bus: the CSI interface clock
+    * mod: the CSI module clock
+    * ram: the CSI DRAM clock
+  - clock-names: the clock names mentioned above
+  - resets: phandles to the reset line driving the CSI
+
+Each CSI node should contain one 'port' child node with one child 'endpoint'
+node, according to the bindings defined in
+Documentation/devicetree/bindings/media/video-interfaces.txt. As mentioned
+above, the endpoint's bus type should be MIPI CSI-2 for CSI0 and parallel or
+Bt656 for CSI1.
+
+Endpoint node properties for CSI1
+---------------------------------
+
+- remote-endpoint	: (required) a phandle to the bus receiver's endpoint
+			   node
+- bus-width:		: (required) must be 8, 10, 12 or 16
+- pclk-sample		: (optional) (default: sample on falling edge)
+- hsync-active		: (only required for parallel)
+- vsync-active		: (only required for parallel)
+
+Example:
+
+csi1: csi@1cb4000 {
+	compatible = "allwinner,sun8i-v3s-csi";
+	reg = <0x01cb4000 0x1000>;
+	interrupts = <GIC_SPI 84 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>;
+
+	port {
+		/* Parallel bus endpoint */
+		csi1_ep: endpoint {
+			remote-endpoint = <&adv7611_ep>;
+			bus-width = <16>;
+
+			/* If hsync-active/vsync-active are missing,
+			   embedded BT.656 sync is used */
+			hsync-active = <0>; /* Active low */
+			vsync-active = <0>; /* Active low */
+			pclk-sample = <1>;  /* Rising */
+		};
+	};
+};
-- 
1.8.3.1

Re: [PATCH v8 1/2] dt-bindings: media: Add Allwinner V3s Camera Sensor Interface (CSI)

[Philipp Zabel]

On Tue, 2018-02-27 at 10:07 +0800, Yong Deng wrote:
> Add binding documentation for Allwinner V3s CSI.
> 
> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Yong Deng <yong.deng@magewell.com>
> ---
>  .../devicetree/bindings/media/sun6i-csi.txt        | 59 ++++++++++++++++++++++
>  1 file changed, 59 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/sun6i-csi.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/sun6i-csi.txt b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> new file mode 100644
> index 000000000000..2ff47a9507a6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> @@ -0,0 +1,59 @@
> +Allwinner V3s Camera Sensor Interface
> +-------------------------------------
> +
> +Allwinner V3s SoC features two CSI module. CSI0 is used for MIPI CSI-2
> +interface and CSI1 is used for parallel interface.
> +
> +Required properties:
> +  - compatible: value must be "allwinner,sun8i-v3s-csi"
> +  - reg: base address and size of the memory-mapped region.
> +  - interrupts: interrupt associated to this IP
> +  - clocks: phandles to the clocks feeding the CSI
> +    * bus: the CSI interface clock
> +    * mod: the CSI module clock
> +    * ram: the CSI DRAM clock
> +  - clock-names: the clock names mentioned above
> +  - resets: phandles to the reset line driving the CSI
> +
> +Each CSI node should contain one 'port' child node with one child 'endpoint'
> +node, according to the bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt. As mentioned
> +above, the endpoint's bus type should be MIPI CSI-2 for CSI0 and parallel or
> +Bt656 for CSI1.
> +
> +Endpoint node properties for CSI1
> +---------------------------------
> +
> +- remote-endpoint	: (required) a phandle to the bus receiver's endpoint
> +			   node
> +- bus-width:		: (required) must be 8, 10, 12 or 16
> +- pclk-sample		: (optional) (default: sample on falling edge)

It would be helpful to state that 1 is rising edge and 0 is falling
edge, see for example ov5640.txt

regards
Philipp

Re: [PATCH v8 1/2] dt-bindings: media: Add Allwinner V3s Camera Sensor Interface (CSI)

[Yong]

On Tue, 27 Feb 2018 09:20:39 +0100
Philipp Zabel <p.zabel@pengutronix.de> wrote:

> On Tue, 2018-02-27 at 10:07 +0800, Yong Deng wrote:
> > Add binding documentation for Allwinner V3s CSI.
> > 
> > Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> > Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > Signed-off-by: Yong Deng <yong.deng@magewell.com>
> > ---
> >  .../devicetree/bindings/media/sun6i-csi.txt        | 59 ++++++++++++++++++++++
> >  1 file changed, 59 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/media/sun6i-csi.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/media/sun6i-csi.txt b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> > new file mode 100644
> > index 000000000000..2ff47a9507a6
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> > @@ -0,0 +1,59 @@
> > +Allwinner V3s Camera Sensor Interface
> > +-------------------------------------
> > +
> > +Allwinner V3s SoC features two CSI module. CSI0 is used for MIPI CSI-2
> > +interface and CSI1 is used for parallel interface.
> > +
> > +Required properties:
> > +  - compatible: value must be "allwinner,sun8i-v3s-csi"
> > +  - reg: base address and size of the memory-mapped region.
> > +  - interrupts: interrupt associated to this IP
> > +  - clocks: phandles to the clocks feeding the CSI
> > +    * bus: the CSI interface clock
> > +    * mod: the CSI module clock
> > +    * ram: the CSI DRAM clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandles to the reset line driving the CSI
> > +
> > +Each CSI node should contain one 'port' child node with one child 'endpoint'
> > +node, according to the bindings defined in
> > +Documentation/devicetree/bindings/media/video-interfaces.txt. As mentioned
> > +above, the endpoint's bus type should be MIPI CSI-2 for CSI0 and parallel or
> > +Bt656 for CSI1.
> > +
> > +Endpoint node properties for CSI1
> > +---------------------------------
> > +
> > +- remote-endpoint	: (required) a phandle to the bus receiver's endpoint
> > +			   node
> > +- bus-width:		: (required) must be 8, 10, 12 or 16
> > +- pclk-sample		: (optional) (default: sample on falling edge)
> 
> It would be helpful to state that 1 is rising edge and 0 is falling
> edge, see for example ov5640.txt

I think this is already documented at 
Documentation/devicetree/bindings/media/video-interfaces.txt.

> 
> regards
> Philipp


Thanks,
Yong