linux-kernel - Re: [PATCH v3 1/4] drm: arm: Add DT bindings documentation for HDLCD driver.

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Message-ID: <20151202145155.GA972@e106497-lin.cambridge.arm.com>
Date:	Wed, 2 Dec 2015 14:51:55 +0000
From:	Liviu Dudau <Liviu.Dudau@....com>
To:	Rob Herring <robh@...nel.org>
Cc:	Jon Medhurst <tixy@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Punit Agrawal <punit.agrawal@....com>,
	Arnd Bergmann <arnd@...db.de>, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Will Deacon <will.deacon@....com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	DRI devel <dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	devicetree <devicetree@...r.kernel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 1/4] drm: arm: Add DT bindings documentation for HDLCD
 driver.

On Wed, Dec 02, 2015 at 08:25:15AM -0600, Rob Herring wrote:
> On Wed, Dec 02, 2015 at 12:22:59PM +0000, Liviu Dudau wrote:
> > Cc: Rob Herring <robh+dt@...nel.org>
> > Cc: Pawel Moll <pawel.moll@....com>
> > Cc: Mark Rutland <mark.rutland@....com>
> > Cc: Ian Campbell <ijc+devicetree@...lion.org.uk>
> > Cc: Kumar Gala <galak@...eaurora.org>
> > 
> > Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
> 
> I still think you should have a more specific compatible string, but 
> here's some rope:

:) Now I need to find some soap and a small wooden box.

> 
> Acked-by: Rob Herring <robh@...nel.org>

Thanks!
Liviu

> 
> > ---
> >  .../devicetree/bindings/display/arm,hdlcd.txt      | 79 ++++++++++++++++++++++
> >  1 file changed, 79 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/arm,hdlcd.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/display/arm,hdlcd.txt b/Documentation/devicetree/bindings/display/arm,hdlcd.txt
> > new file mode 100644
> > index 0000000..78bc242
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/arm,hdlcd.txt
> > @@ -0,0 +1,79 @@
> > +ARM HDLCD
> > +
> > +This is a display controller found on several development platforms produced
> > +by ARM Ltd and in more modern of its' Fast Models. The HDLCD is an RGB
> > +streamer that reads the data from a framebuffer and sends it to a single
> > +digital encoder (DVI or HDMI).
> > +
> > +Required properties:
> > +  - compatible: "arm,hdlcd"
> > +  - reg: Physical base address and length of the controller's registers.
> > +  - interrupts: One interrupt used by the display controller to notify the
> > +    interrupt controller when any of the interrupt sources programmed in
> > +    the interrupt mask register have activated.
> > +  - clocks: A list of phandle + clock-specifier pairs, one for each
> > +    entry in 'clock-names'.
> > +  - clock-names: A list of clock names. For HDLCD it should contain:
> > +      - "pxlclk" for the clock feeding the output PLL of the controller.
> > +
> > +Required sub-nodes:
> > +  - port: The HDLCD connection to an encoder chip. The connection is modeled
> > +    using the OF graph bindings specified in
> > +    Documentation/devicetree/bindings/graph.txt.
> > +
> > +Optional properties:
> > +  - memory-region: phandle to a node describing memory (see
> > +    Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt) to be
> > +    used for the framebuffer; if not present, the framebuffer may be located
> > +    anywhere in memory.
> > +
> > +
> > +Example:
> > +
> > +/ {
> > +	...
> > +
> > +	hdlcd@...00000 {
> > +		compatible = "arm,hdlcd";
> > +		reg = <0 0x2b000000 0 0x1000>;
> > +		interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
> > +		clocks = <&oscclk5>;
> > +		clock-names = "pxlclk";
> > +		port {
> > +			hdlcd_output: endpoint@0 {
> > +				remote-endpoint = <&hdmi_enc_input>;
> > +			};
> > +		};
> > +	};
> > +
> > +	/* HDMI encoder on I2C bus */
> > +	i2c@...a0000 {
> > +		....
> > +		hdmi-transmitter@70 {
> > +			compatible = ".....";
> > +			reg = <0x70>;
> > +			port@0 {
> > +				hdmi_enc_input: endpoint {
> > +					remote-endpoint = <&hdlcd_output>;
> > +				};
> > +
> > +				hdmi_enc_output: endpoint {
> > +					remote-endpoint = <&hdmi_1_port>;
> > +				};
> > +			};
> > +		};
> > +
> > +	};
> > +
> > +	hdmi1: connector@1 {
> > +		compatible = "hdmi-connector";
> > +		type = "a";
> > +		port {
> > +			hdmi_1_port: endpoint {
> > +				remote-endpoint = <&hdmi_enc_output>;
> > +			};
> > +		};
> > +	};
> > +
> > +	...
> > +};
> > -- 
> > 2.6.2
> > 
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
====================
| I would like to |
| fix the world,  |
| but they're not |
| giving me the   |
 \ source code!  /
  ---------------
    ¯\_(ツ)_/¯
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