[PATCH v7 4/8] drm/sunxi: Add DT bindings documentation of Allwinner HDMI

Jean-Francois Moine moinejf at free.fr
Tue Nov 29 19:27:51 UTC 2016


On Tue, 29 Nov 2016 20:46:22 +0200
Laurent Pinchart <laurent.pinchart at ideasonboard.com> wrote:
	[snip]
> > +Example:
> > +
> > +	hdmi: hdmi at 01ee0000 {
> > +		compatible = "allwinner,sun8i-a83t-hdmi";
> > +		reg = <0x01ee0000 0x20000>;
> > +		clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI>,
> > +			 <&ccu CLK_HDMI_DDC>;
> > +		clock-names = "bus", "clock", "ddc-clock";
> > +		resets = <&ccu RST_HDMI0>, <&ccu RST_HDMI1>;
> > +		reset-names = "hdmi0", "hdmi1";
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&hdmi_pins_a>;
> > +		status = "disabled";
> > +		#address-cells = <1>;
> > +		#size-cells = <0>;
> > +		port at 0 {			/* video */
> > +			reg = <0>;
> > +			hdmi_tcon1: endpoint {
> > +				remote-endpoint = <&tcon1_hdmi>;
> > +			};
> > +		};
> > +		port at 1 {			/* audio */
> > +			reg = <1>;
> > +			hdmi_i2s2: endpoint {
> > +				remote-endpoint = <&i2s2_hdmi>;
> > +			};
> > +		};
> 
> 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):

plane -> DE2 mixer ---> TCON -----> HDMI -----> display device
----- plane ------    - CRTC -   - encoder  \
                                   connector -- (HDMI cable)
         audio-controller -   - audio-codec /

> > +	};

-- 
Ken ar c'hentaƱ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/


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