Add bindings documentation for the i.MX media driver.
Signed-off-by: Steve Longerbeam <steve_longerb...@mentor.com>
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Documentation/devicetree/bindings/media/imx.txt | 74 +++++++++++++++++++++++++
1 file changed, 74 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/imx.txt
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b/Documentation/devicetree/bindings/media/imx.txt
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+Freescale i.MX Media Video Device
+=================================
+
+Video Media Controller node
+---------------------------
+
+This is the media controller node for video capture support. It is a
+virtual device that lists the camera serial interface nodes that the
+media device will control.
+
+Required properties:
+- compatible : "fsl,imx-capture-subsystem";
+- ports : Should contain a list of phandles pointing to camera
+ sensor interface ports of IPU devices
+
+example:
+
+capture-subsystem {
+ compatible = "fsl,imx-capture-subsystem";
+ ports = <&ipu1_csi0>, <&ipu1_csi1>;
+};
+
+fim child node
+--------------
+
+This is an optional child node of the ipu_csi port nodes. If present and
+available, it enables the Frame Interval Monitor. Its properties can be
+used to modify the method in which the FIM measures frame intervals.
+Refer to Documentation/media/v4l-drivers/imx.rst for more info on the
+Frame Interval Monitor.
+
+Optional properties:
+- fsl,input-capture-channel: an input capture channel and channel flags,
+ specified as <chan flags>. The channel number
+ must be 0 or 1. The flags can be
+ IRQ_TYPE_EDGE_RISING, IRQ_TYPE_EDGE_FALLING, or
+ IRQ_TYPE_EDGE_BOTH, and specify which input
+ capture signal edge will trigger the input
+ capture event. If an input capture channel is
+ specified, the FIM will use this method to
+ measure frame intervals instead of via the EOF
+ interrupt. The input capture method is much
+ preferred over EOF as it is not subject to
+ interrupt latency errors. However it requires
+ routing the VSYNC or FIELD output signals of
+ the camera sensor to one of the i.MX input
+ capture pads (SD1_DAT0, SD1_DAT1), which also
+ gives up support for SD1.
+
+
+mipi_csi2 node
+--------------
+
+This is the device node for the MIPI CSI-2 Receiver, required for MIPI
+CSI-2 sensors.
+
+Required properties:
+- compatible : "fsl,imx6-mipi-csi2", "snps,dw-mipi-csi2";
+- reg : physical base address and length of the register set;
+- clocks : the MIPI CSI-2 receiver requires three clocks: hsi_tx
+ (the D-PHY clock), video_27m (D-PHY PLL reference
+ clock), and eim_podf;
+- clock-names : must contain "dphy", "ref", "pix";
+- port@* : five port nodes must exist, containing endpoints
+ connecting to the source and sink devices according to
+ of_graph bindings. The first port is an input port,
+ connecting with a MIPI CSI-2 source, and ports 1
+ through 4 are output ports connecting with parallel
+ bus sink endpoint nodes and correspond to the four
+ MIPI CSI-2 virtual channel outputs.
+
+Optional properties:
+- interrupts : must contain two level-triggered interrupts,
+ in order: 100 and 101;
--
2.7.4
