linux-kernel - Re: [PATCH v15 06/12] dt-bindings: add document for dw

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Date:	Tue, 02 Dec 2014 19:23:49 +0100
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Andy Yan <andy.yan@...k-chips.com>
Cc:	airlied@...ux.ie, heiko@...ech.de, fabio.estevam@...escale.com,
	rmk+kernel@....linux.org.uk,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Josh Boyer <jwboyer@...hat.com>,
	Sean Paul <seanpaul@...omium.org>,
	Inki Dae <inki.dae@...sung.com>,
	Dave Airlie <airlied@...hat.com>,
	Arnd Bergmann <arnd@...db.de>,
	Lucas Stach <l.stach@...gutronix.de>,
	Zubair.Kakakhel@...tec.com, djkurtz@...gle.com, ykk@...k-chips.com,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, jay.xu@...k-chips.com,
	Pawel Moll <pawel.moll@....com>, mark.yao@...k-chips.com,
	Mark Rutland <mark.rutland@....com>,
	vladimir_zapolskiy@...tor.com,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v15 06/12] dt-bindings: add document for dw_hdmi

Hi Andy,

Am Dienstag, den 02.12.2014, 15:42 +0800 schrieb Andy Yan:
> diff --git a/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt b/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
> new file mode 100644
> index 0000000..107c1ca
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
> @@ -0,0 +1,40 @@
> +DesignWare HDMI bridge bindings
> +
> +Required properities:
> +- compatible: platform specific such as:
> +   * "fsl,imx6q-hdmi"
> +   * "fsl,imx6dl-hdmi"
> +   * "rockchip,rk3288-dw-hdmi"

I think we should add a common compatible value "snps,dw-hdmi-tx" here:

	compatible = "fsl,imx6q-hdmi", "snps,dw-hdmi-tx";

> +- reg: Physical base address and length of the controller's registers.
> +- ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing

Better make ddc-i2c-bus optional, see the other thread about the ddc i2c
master.

> +- interrupts: The HDMI interrupt number
> +
> +Optional properties
> +- reg-io-width: the width of the reg:1,4, default set to 1 if not present
> +
> +Example:
> +	hdmi: hdmi@...0000 {
> +		compatible = "fsl,imx6q-hdmi";
> +		reg = <0x00120000 0x9000>;
> +		interrupts = <0 115 0x04>;
> +		gpr = <&gpr>;
> +		clocks = <&clks 123>, <&clks 124>;
> +		clock-names = "iahb", "isfr";
> +		ddc-i2c-bus = <&i2c2>;
> +
> +		port@0 {
> +			reg = <0>;
> +
> +			hdmi_mux_0: endpoint {
> +				remote-endpoint = <&ipu1_di0_hdmi>;
> +			};
> +		};
> +
> +		port@1 {
> +			reg = <1>;
> +
> +			hdmi_mux_1: endpoint {
> +				remote-endpoint = <&ipu1_di1_hdmi>;
> +			};
> +		};
> +	};

regards
Philipp

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