Hi Rob,
On 02/27/2017 06:38 AM, Rob Herring wrote:
On Wed, Feb 15, 2017 at 06:19:03PM -0800, Steve Longerbeam wrote:
Add bindings documentation for the i.MX media driver.
Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
---
Documentation/devicetree/bindings/media/imx.txt | 66 +++++++++++++++++++++++++
1 file changed, 66 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/imx.txt
diff --git a/Documentation/devicetree/bindings/media/imx.txt b/Documentation/devicetree/bindings/media/imx.txt
new file mode 100644
index 0000000..fd5af50
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/imx.txt
@@ -0,0 +1,66 @@
+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,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.
This should have a compatible string.
I don't think so. The fim child node does not represent a device. The
CSI supports monitoring frame intervals (reporting via a v4l2 event
when a measured frame interval falls outside the nominal interval
by some tolerance value). The fim child node is only to group properties
for the FIM under a common child node.
+
+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 DPHY clock), video_27m, and eim_podf;
+- clock-names : must contain "dphy", "cfg", "pix";
Don't you need ports to describe the sensor and IPU connections?
Done.
Steve
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