Message-ID: <20170403141135.6rwwftkiqqicmn6a@rob-hp-laptop>
Date:   Mon, 3 Apr 2017 09:11:35 -0500
From:   Rob Herring <robh@...nel.org>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Steve Longerbeam <slongerbeam@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Nick Dyer <nick@...anahar.org>, markus.heiser@...marit.de,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Benoit Parrot <bparrot@...com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Arnd Bergmann <arnd@...db.de>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
        tiffany lin <tiffany.lin@...iatek.com>,
        Jean-Christophe Trotin <jean-christophe.trotin@...com>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Songjun Wu <songjun.wu@...rochip.com>,
        Andrew-CT Chen (陳智迪) 
        <andrew-ct.chen@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        shuah@...nel.org, Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Pavel Machek <pavel@....cz>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        devel@...verdev.osuosl.org,
        Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: Re: [PATCH v6 02/39] [media] dt-bindings: Add bindings for i.MX
 media driver

On Wed, Mar 29, 2017 at 09:39:05AM +0100, Russell King - ARM Linux wrote:
> On Tue, Mar 28, 2017 at 07:21:34PM -0500, Rob Herring wrote:
> > On Mon, Mar 27, 2017 at 7:40 PM, Steve Longerbeam <slongerbeam@...il.com> wrote:
> > > Add bindings documentation for the i.MX media driver.
> > >
> > > Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
> > > ---
> > >  Documentation/devicetree/bindings/media/imx.txt | 74 +++++++++++++++++++++++++
> > >  1 file changed, 74 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..3059c06
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/imx.txt
> > > @@ -0,0 +1,74 @@
> > > +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";
> > 
> > As I mentioned in v5, there's a DW CSI2 binding in progress. This
> > needs to be based on that.
> 
> Maybe someone can provide some kind of reference to it, and it's
> associated driver?

Let me Google that for you (TM). The reference is in my comments on v5. 
Here's a reference to it [1].

[1] https://lkml.org/lkml/2017/3/20/524

> 
> -- 
> RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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