Hi Rob. On Tue, Apr 14, 2020 at 02:40:54PM -0500, Rob Herring wrote: > On Sun, Apr 12, 2020 at 08:20:11PM +0200, Sam Ravnborg wrote: > > The wiring property is used to describe the wiring between > > the connector and the panel. The property can be used when the > > wiring is used to change the mode from for example > > BGR to RGB. The first users are the at91sam9 family where > > such a wiring trick is sometimes used. > > The possilbe values are so far limited to what is required > > by the at91sam9 family, but using "text" allows us to extend > > this in the future. > > > > There exists similar properties today: > > - display/tilcdc/tilcdc.txt: blue-and-red-wiring > > - display/atmel,lcdc.txt: atmel,lcd-wiring-mode > > > > Neither of the above are defined as endpoint properties. > > > > The new property "wiring" has a more general name and > > is defined as an endpoint property. > > It will replace atmel,lcd-wiring-mode and may replace > > blue-and-red-wiring. > > > > Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx> > > Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> > > Cc: Rob Herring <robh@xxxxxxxxxx> > > Cc: Hans Verkuil <hverkuil@xxxxxxxxx> > > Cc: linux-media@xxxxxxxxxxxxxxx > > --- > > Documentation/devicetree/bindings/media/video-interfaces.txt | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt > > index f884ada0bffc..c3bb87c5c9a9 100644 > > --- a/Documentation/devicetree/bindings/media/video-interfaces.txt > > +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt > > @@ -141,6 +141,9 @@ Optional endpoint properties > > - link-frequencies: Allowed data bus frequencies. For MIPI CSI-2, for > > instance, this is the actual frequency of the bus, not bits per clock per > > lane value. An array of 64-bit unsigned integers. > > +- wiring: Wiring of data lines to display. > > + "straight" - normal wiring. > > Don't really need a property to express this... > > > + "red-blue-reversed" - red and blue lines reversed. > > For a common property, I think this needs to be looked at in terms of > formats and some of the format negotiation work Boris was doing. OK, I will bite the bullet and try to understand this good enough to come up with a proposal. I will delay the conversion a bit, but we are in no hurry. Sam
