From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Subject: Re: [PATCH v7 2/8] drm/sun8i: Add DT bindings documentation of Allwinner DE2 Date: Tue, 29 Nov 2016 20:41:30 +0200 Message-ID: <36111311.d8ul9hQ2CU@avalon> References: <92fc53084274d5ab04fe28f2dc0b16cf5d94481e.1480414715.git.moinejf@free.fr> Reply-To: laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org In-Reply-To: <92fc53084274d5ab04fe28f2dc0b16cf5d94481e.1480414715.git.moinejf-GANU6spQydw@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Cc: Jean-Francois Moine , Dave Airlie , Maxime Ripard , Rob Herring , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org Hi Jean-Fran=C3=A7ois, Thank you for the patch. On Monday 28 Nov 2016 19:02:39 Jean-Francois Moine wrote: > Signed-off-by: Jean-Francois Moine > --- > .../bindings/display/sunxi/sun8i-de2.txt | 121 +++++++++++++++= +++ > 1 file changed, 121 insertions(+) > create mode 100644 > Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt >=20 > diff --git a/Documentation/devicetree/bindings/display/sunxi/sun8i-de2.tx= t > b/Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt new file > mode 100644 > index 0000000..edf38b8 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/sunxi/sun8i-de2.txt > @@ -0,0 +1,121 @@ > +Allwinner sun8i Display Engine 2 subsystem > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > + > +The Allwinner DE2 subsystem contains a display controller (DE2), > +one or two LCD controllers (Timing CONtrollers) and their external > +interfaces (encoders/connectors). > + > + +-----------+ > + | DE2 | > + | | > + | +-------+ | > + plane --->| | | +------+ > + | | mixer |---->| TCON |---> encoder ---> display > + plane --->| | | +------+ connector device > + | +-------+ | > + | | > + | +-------+ | > + plane --->| | | +------+ > + | | mixer |---->| TCON |---> encoder ---> display > + plane --->| | | +------+ connector device > + | +-------+ | > + +-----------+ > + > +The DE2 contains a processor which mixes the input planes and creates > +the images which are sent to the TCONs. > +From the software point of vue, there are 2 independent real-time > +mixers, each one being statically associated to one TCON. > + > +The TCONs adjust the image format to the one of the display device. > + > +Display controller (DE2) > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > + > +Required properties: > + > +- compatible: value should be one of the following > + "allwinner,sun8i-a83t-display-engine" > + "allwinner,sun8i-h3-display-engine" > + > +- reg: base address and size of the I/O memory > + > +- clocks: must include clock specifiers corresponding to entries in the > + clock-names property. > + > +- clock-names: must contain > + "bus": bus gate > + "clock": clock > + > +- resets: phandle to the reset of the device > + > +- ports: must contain a list of 2 phandles, indexed by mixer number, > + and pointing to display interface ports of TCONs > + > +LCD controller (TCON) > +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > + > +Required properties: > + > +- compatible: should be > + "allwinner,sun8i-a83t-tcon" > + > +- reg: base address and size of the I/O memory > + > +- clocks: must include clock specifiers corresponding to entries in the > + clock-names property. > + > +- clock-names: must contain > + "bus": bus gate > + "clock": pixel clock > + > +- resets: phandle to the reset of the device > + > +- interrupts: interrupt number for the TCON > + > +- port: port node with endpoint definitions as defined in > + Documentation/devicetree/bindings/media/video-interfaces.txt > + > +Example: > + > + de: de-controller@01000000 { > + compatible =3D "allwinner,sun8i-h3-display-engine"; > + reg =3D <0x01000000 0x400000>; > + clocks =3D <&ccu CLK_BUS_DE>, <&ccu CLK_DE>; > + clock-names =3D "bus", "clock"; > + resets =3D <&ccu RST_BUS_DE>; > + ports =3D <&tcon0_p>, <&tcon1_p>; This isn't how the OF graph DT bindings are used. You should instead have ports { #address-cells =3D <1>; #size-cells =3D <0>; port@0 { de_out_0: endpoint { remote_endpoint =3D <&tcon0_hdmi>; }; }; port@1 { /* No endpoint as the port is not connected */ }; }; > + }; > + > + tcon0: lcd-controller@01c0c000 { > + compatible =3D "allwinner,sun8i-a83t-tcon"; > + reg =3D <0x01c0c000 0x400>; > + clocks =3D <&ccu CLK_BUS_TCON0>, <&ccu CLK_TCON0>; > + clock-names =3D "bus", "clock"; > + resets =3D <&ccu RST_BUS_TCON0>; > + interrupts =3D ; > + #address-cells =3D <1>; > + #size-cells =3D <0>; > + tcon0_p: port { > + tcon0_hdmi: endpoint { > + remote-endpoint =3D <&hdmi_tcon0>; > + }; > + }; and here port { tcon0_hdmi: endpoint { remote-endpoint =3D <&de_out_0>; }; }; > + }; > + > + /* not used */ > + tcon1: lcd-controller@01c0d000 { > + compatible =3D "allwinner,sun8i-h3-tcon"; > + reg =3D <0x01c0d000 0x400>; > + clocks =3D <&ccu CLK_BUS_TCON1>, > + <&ccu CLK_TCON0>; /* no clock */ > + clock-names =3D "bus", "clock"; > + interrupts =3D ; > + status =3D "disabled"; > + #address-cells =3D <1>; > + #size-cells =3D <0>; > + tcon1_p: port { > + endpoint { > + /* empty */ > + }; > + }; and here port { /* No endpoint as the port is not connected */ }; (although I'm not sure why you don't connect it) > + }; --=20 Regards, Laurent Pinchart --=20 You received this message because you are subscribed to the Google Groups "= linux-sunxi" group. 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