Hi,

On Tue, 19 Dec 2017 13:53:28 +0200
Sakari Ailus [off-list ref] wrote:

Hi Yong,

On Thu, Jul 27, 2017 at 01:01:36PM +0800, Yong Deng wrote:

quoted

Add binding documentation for Allwinner V3s CSI.

Signed-off-by: Yong Deng <yong.deng-+3dxTMOEIRNWk0Htik3J/w@public.gmane.org>

DT bindings should precede the driver.

OK.

quoted

---
 .../devicetree/bindings/media/sun6i-csi.txt        | 49 ++++++++++++++++++++++
 1 file changed, 49 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 0000000..f8d83f6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/sun6i-csi.txt

@@ -0,0 +1,49 @@
+Allwinner V3s Camera Sensor Interface
+------------------------------
+
+Required properties:
+  - compatible: value must be "allwinner,sun8i-v3s-csi"

What are sun6i and sun8i? Is this device first present in sun6i SoCs,
whereas you have only defined bindings for sun8i?

Yes, some sun6i SoCs has the almost same CSI module.
There is only V3s on my hand. So, I only tested it on V3s. But
some people work on the others.

quoted

+  - reg: base address and size of the memory-mapped region.
+  - interrupts: interrupt associated to this IP
+  - clocks: phandles to the clocks feeding the CSI
+    * ahb: 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
+
+- ports: A ports node with endpoint definitions as defined in
+  Documentation/devicetree/bindings/media/video-interfaces.txt.

Please document mandatory and optional endpoint properties relevant for the
hardware.

I have added below commit in my v3:
Currently, the driver only support the parallel interface. So, a single port
node with one endpoint and parallel bus is supported.

quoted

+
+Example:
+
+	csi1: csi@01cb4000 {
+		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 = "ahb", "mod", "ram";
+		resets = <&ccu RST_BUS_CSI>;
+
+		port {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			/* Parallel bus endpoint */
+			csi1_ep: endpoint {
+				remote-endpoint = <&adv7611_ep>;
+				bus-width = <16>;
+				data-shift = <0>;
+
+				/* If hsync-active/vsync-active are missing,
+				   embedded BT.656 sync is used */
+				hsync-active = <0>; /* Active low */
+				vsync-active = <0>; /* Active low */
+				data-active = <1>;  /* Active high */
+				pclk-sample = <1>;  /* Rising */
+			};
+		};
+	};
+

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus-X3B1VOXEql0@public.gmane.org

Thanks,
Yong
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