linux-kernel - Re: [PATCH v17 06/12] dt-bindings: add document for dw

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Date:	Thu, 04 Dec 2014 21:27:44 +0800
From:	Andy Yan <andy.yan@...k-chips.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
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>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	vladimir_zapolskiy@...tor.com
Subject: Re: [PATCH v17 06/12] dt-bindings: add document for dw_hdmi

Hi Philipp:
On 2014年12月04日 19:30, Philipp Zabel wrote:
> Hi Andy,
>
> Am Donnerstag, den 04.12.2014, 18:06 +0800 schrieb Andy Yan:
>> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
>>
>> ---
>>
>> Changes in v17: None
>> Changes in v16:
>> - describe ddc-i2c-bus as optional
>> - add common clocks bindings
>>
>> Changes in v15: None
>> Changes in v14: None
>> Changes in v13: None
>> Changes in v12: None
>> Changes in v11: None
>> Changes in v10: None
>> Changes in v9: None
>> Changes in v8:
>> - correct some spelling mistake
>> - modify ddc-i2c-bus and interrupt description
>>
>> Changes in v7: None
>> Changes in v6: None
>> Changes in v5: None
>> Changes in v4: None
>> Changes in v3: None
>>
>>   .../devicetree/bindings/drm/bridge/dw_hdmi.txt     | 45 ++++++++++++++++++++++
>>   1 file changed, 45 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
>>
>> 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..fb14730
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
>> @@ -0,0 +1,45 @@
>> +DesignWare HDMI bridge bindings
>> +
>> +Required properities:
>> +- compatible: platform specific such as:
>> +   * "snps,dw-hdmi-tx"
>> +   * "fsl,imx6q-hdmi"
>> +   * "fsl,imx6dl-hdmi"
>> +   * "rockchip,rk3288-dw-hdmi"
>> +- reg: Physical base address and length of the controller's registers.
>> +- interrupts: The HDMI interrupt number
>> +- clocks, clock-names : must have the phandles to the HDMI iahb and isrf clocks,
>> +  as described in Documentation/devicetree/bindings/clock/clock-bindings.txt,
>> +  the clock-names should be "iahb", "isfr"
> This is missing the port bindings, I think it should mention the port
> property here and refer to the soc specific binding document.
>
>   - port@...: SoC specific port nodes with endpoint definitions as defined
>     in Documentation/devicetree/bindings/media/video-interfaces.txt,
>     please refer to the SoC specific binding document:
>      * Documentation/devicetree/bindings/drm/imx/hdmi.txt
>      * Documentation/devicetree/bindings/video/dw_hdmi-rockchip.txt
>
> This also makes be wonder, shouldn't dw_hdmi-rockchip be under drm/?
    ok, I will add the port bindings
    because rockchip drm binds are under video, so I put the 
dw_hdmi-rockchip
    under video to keep consistency.
>
>> +Optional properties
>> +- reg-io-width: the width of the reg:1,4, default set to 1 if not present
>> +- ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing
>> +- clkocks, clock-names: phandle to the HDMI cec clock, name should be "cec"
> s/clkocks/clocks/, and I'd uppercase the HDMI CEC clock for consistency.
     thanks for point it, I will correct it in next version
>
>> +
>> +Example:
>> +	hdmi: hdmi@...0000 {
>> +		compatible = "fsl,imx6q-hdmi";
> Could you change this example to:
> 		compatible = "fsl,imx6q-hdmi", "snps,dw-hdmi-tx"
>
>> +		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>;
>> +			};
>> +		};
>> +	};
>
>
>
>


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