Hi Baruch, On Thu, Jan 12, 2017 at 02:06:03PM +0200, Baruch Siach wrote: > Hi Pavel, > > On Wed, Jan 11, 2017 at 11:53:35PM +0100, Pavel Machek wrote: > > From: Sakari Ailus <sakari.ailus@xxxxxx> > > > > In the vast majority of cases the bus type is known to the driver(s) > > since a receiver or transmitter can only support a single one. There > > are cases however where different options are possible. > > > > The existing V4L2 OF support tries to figure out the bus type and > > parse the bus parameters based on that. This does not scale too well > > as there are multiple serial busses that share common properties. > > > > Some hardware also supports multiple types of busses on the same > > interfaces. > > > > Document the CSI1/CCP2 property strobe. It signifies the clock or > > strobe mode. > > > > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx> > > Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx> > > Signed-off-by: Pavel Machek <pavel@xxxxxx> > > > > diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt > > index 9cd2a36..08c4498 100644 > > --- a/Documentation/devicetree/bindings/media/video-interfaces.txt > > +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt > > @@ -76,6 +76,11 @@ Optional endpoint properties > > mode horizontal and vertical synchronization signals are provided to the > > slave device (data source) by the master device (data sink). In the master > > mode the data source device is also the source of the synchronization signals. > > +- bus-type: data bus type. Possible values are: > > + 0 - MIPI CSI2 > > + 1 - parallel / Bt656 > > Why not have separate values for parallel and BT.656? The current implementation of V4L2 OF support digs the information from other properties (hsync-active, vsync-active and field-even-active). If any of them are present, the bus is considered to be a regular parallel bus --- the Bt.656 has no such signals. CSI-2 bus is assumed if CSI-2 specific properties can be found. However, explicit bus type is needed as the type of the bus isn't anymore implicitly determinable with the addition of CSI-1 and CCP2 busses: they use the same properties. -- Kind regards, Sakari Ailus e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
