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Re: [PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards.

From Russell King - ARM Linux <linux@arm.linux.org.uk>
Newsgroups linux.kernel
Subject Re: [PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards.
Date 2015-08-05 20:00 +0200
Message-ID <pUb8S-7b-7@gated-at.bofh.it> (permalink)
References <pU8NI-5jj-11@gated-at.bofh.it> <pU8NK-5jj-69@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, Aug 05, 2015 at 03:28:11PM +0100, Liviu Dudau wrote:
> +		hdmi-transmitter@71 {
>  			compatible = "nxp,tda998x";
>  			reg = <0x71>;
> +			port {
> +				tda998x_1_input: endpoint@0 {
> +					remote-endpoint = <&hdlcd1_output>;
> +				};
> +
> +				tda998x_1_output: endpoint@1 {
> +					remote-endpoint = <&hdmi1_connector_output>;
> +				};
> +			};

This isn't compliant with the TDA998x binding, and is very likely to
screw Jean's work on adding audio support.  See emails on lakml and
Documentation/devicetree/bindings/drm/i2c/tda998x.txt (which looks
like it needs updating to include the ports stuff.)

Also, the whole question of representing connectors in a DRM model is
yet to be established.  Yes, DT should describe the hardware, but we
don't yet know _how_ to describe physical connectors with stuff
implemented on top of DRM yet, and we have nothing that makes use of
this.

Also note that ePAPR requires a reg= property if you specify a
unit-address (the bit after the @ sign) so the above is non-compliant
with ePAPR as well.

-- 
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according to speedtest.net.
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Thread

[PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards. Liviu Dudau <Liviu.Dudau@arm.com> - 2015-08-05 17:30 +0200
  Re: [PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards. Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-05 20:00 +0200
    Re: [PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards. Liviu Dudau <Liviu.Dudau@arm.com> - 2015-08-05 21:10 +0200
      Re: [PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards. Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-05 23:50 +0200
        Re: [PATCH 3/4] arm64: Juno: Add HDLCD support to the Juno boards. Liviu Dudau <Liviu.Dudau@arm.com> - 2015-08-06 12:20 +0200

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