Re: [PATCH v3 2/2] media: atmel-isc: Update device tree binding documentation

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On Thu, Feb 14, 2019 at 09:44:22AM -0600, Rob Herring wrote:
> On Mon, Feb 04, 2019 at 02:18:14PM +0000, Ken Sloat wrote:
> > From: Ken Sloat <ksloat@xxxxxxxxxxxxxx>
> 
> Needs a better subject, not one that applies to any change. Update with 
> what?
> 
> > Update device tree binding documentation specifying how to
> > enable BT656 with CRC decoding and specify properties for
> > default parallel bus type.
> > 
> > Signed-off-by: Ken Sloat <ksloat@xxxxxxxxxxxxxx>
> > ---
> >  Changes in v2:
> >  -Use correct media "bus-type" dt property.
> > 
> >  Changes in v3:
> >  -Specify default bus type.
> >  -Document optional parallel bus flags.
> > 
> >  .../devicetree/bindings/media/atmel-isc.txt       | 15 +++++++++++++++
> >  1 file changed, 15 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/media/atmel-isc.txt b/Documentation/devicetree/bindings/media/atmel-isc.txt
> > index bbe0e87c6188..db3749a3964f 100644
> > --- a/Documentation/devicetree/bindings/media/atmel-isc.txt
> > +++ b/Documentation/devicetree/bindings/media/atmel-isc.txt
> > @@ -21,6 +21,21 @@ Required properties for ISC:
> >  - pinctrl-names, pinctrl-0
> >  	Please refer to pinctrl-bindings.txt.
> >  
> > +Optional properties for ISC:
> > +- bus-type
> > +	When set to 6, Bt.656 decoding (embedded sync) with CRC decoding
> > +	is enabled. If omitted, then the default bus-type is parallel and
> > +	the additional properties to follow can be specified:
> > +- hsync-active
> > +	Active state of the HSYNC signal, 0/1 for LOW/HIGH respectively.
> > +	If unspecified, this signal is set as active HIGH.
> > +- vsync-active
> > +	Active state of the VSYNC signal, 0/1 for LOW/HIGH respectively.
> > +	If unspecified, this signal is set as active HIGH.
> > +- pclk-sample
> > +	Sample data on rising (1) or falling (0) edge of the pixel clock
> > +	signal. If unspecified, data is sampled on the rising edge.
> 
> These are all common properties, right? No need to redefine them. Just 
> reference the common doc. Maybe the default needs to be stated here if 
> different or not defined.

Yeah, video-interfaces.txt does not define the defaults; it's hardware
specific.

-- 
Sakari Ailus



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