On Tue, 29 Nov 2016 22:10:01 +0200 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > Hi Jean-François, > > On Tuesday 29 Nov 2016 21:04:55 Jean-Francois Moine wrote: > > On Tue, 29 Nov 2016 21:33 +0200 Laurent Pinchart wrote: > > >>> You need a third port for the HDMI encoder output, connected to an > > >>> HDMI connector DT node. > > >> > > >> I don't see what you mean. The HDMI device is both the encoder > > >> and connector (as the TDA998x): > > > > > > The driver might create both an encoder and a connector, but I very much > > > doubt that the "allwinner,sun8i-a83t-hdmi" hardware contains a connector, > > > unless the SoC package has an HDMI connector coming out of it :-) > > > > > >> plane -> DE2 mixer ---> TCON -----> HDMI -----> display device > > >> ----- plane ------ - CRTC - - encoder \ > > >> connector -- (HDMI cable) > > >> audio-controller - - audio-codec / > > > > The schema is the same as the Dove Cubox: the TDA998x is just a chip > > with some wires going out and the physical connector is supposed to be > > at the end of the wires. > > I've missed the Dove Cubox DT bindings when they were submitted. Fortunately > (or unfortunately for you, depending on how you look at it ;-)) I've paid more > attention this time. > > > Here, the HDMI pins of the SoC go to a pure hardware chip and then to > > the physical connector. Which software entity do you want to add? > > I don't want to add a software entity, I just want to model the connector in > DT as it's present in the system. Even though that's more common for other bus > types than HDMI (LVDS for instance) it wouldn't be inconceivable to connect > the HDMI signals to an on-board chim instead of an HDMI connector, so the HDMI > encoder output should be modelled by a port and connected to a connector DT > node in this case. Well, I don't see what this connector can be. May you give me a DT example? -- Ken ar c'hentañ | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/ -- 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
