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

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Date:	Wed, 03 Dec 2014 08:54:41 +0800
From:	Andy Yan <andy.yan@...k-chips.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
CC:	Mark Rutland <mark.rutland@....com>, heiko@...ech.de,
	airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
	ykk@...k-chips.com, devel@...verdev.osuosl.org,
	Pawel Moll <pawel.moll@....com>,
	linux-rockchip@...ts.infradead.org,
	Grant Likely <grant.likely@...aro.org>,
	Dave Airlie <airlied@...hat.com>, jay.xu@...k-chips.com,
	devicetree@...r.kernel.org, Zubair.Kakakhel@...tec.com,
	Arnd Bergmann <arnd@...db.de>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Inki Dae <inki.dae@...sung.com>,
	Rob Herring <robh+dt@...nel.org>,
	Sean Paul <seanpaul@...omium.org>, rmk+kernel@....linux.org.uk,
	mark.yao@...k-chips.com, fabio.estevam@...escale.com,
	Josh Boyer <jwboyer@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, djkurtz@...gle.com,
	Kumar Gala <galak@...eaurora.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	vladimir_zapolskiy@...tor.com, Lucas Stach <l.stach@...gutronix.de>
Subject: Re: [PATCH v15 06/12] dt-bindings: add document for dw_hdmi

Hi Philipp:
On 2014年12月03日 02:23, Philipp Zabel wrote:
> 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";
>
      How about "snps,dw-hdmi", because the driver is not only about
   hdmi tx, but also include hdmi phy.
       If we add such compatible value, do we have to implement another
    platform driver like dw_hdmi-pltfm.c with the 
compatible="snps,dw-hdmi" ,
    or just include the compatible value in dw_hdmi-imx.c and 
dw_hdmi-rockchip.c?
>> +- 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
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip
>
>
>


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