linux-kernel - Re: [PATCH 2/4 v3] drm: Add DT bindings documentation for ARC PGU display controller

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1458831472.12765.8.camel@synopsys.com>
Date:	Thu, 24 Mar 2016 14:57:52 +0000
From:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:	"robh@...nel.org" <robh@...nel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-snps-arc@...ts.infradead.org" 
	<linux-snps-arc@...ts.infradead.org>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"airlied@...ux.ie" <airlied@...ux.ie>
Subject: Re: [PATCH 2/4 v3] drm: Add DT bindings documentation for ARC PGU
 display controller

Hi Rob,

On Mon, 2016-03-21 at 08:04 -0500, Rob Herring wrote:
> On Fri, Mar 11, 2016 at 06:42:37PM +0300, Alexey Brodkin wrote:
> > 
> > This add DT bindings documentation for ARC PGU display controller.
> > 
> > Signed-off-by: Alexey Brodkin <abrodkin@...opsys.com>
> > 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>
> > Cc: David Airlie <airlied@...ux.ie>
> > Cc: dri-devel@...ts.freedesktop.org
> > Cc: devicetree@...r.kernel.org
> > Cc: linux-snps-arc@...ts.infradead.org
> > ---
> > 
> > Changes v2 -> v3:
> >  * Reverted back to initial larger version of example
> >    with minor fixes (thanks Rob for spotting those).
> > 
> > Changes v1 -> v2:
> >  * Removed everything except PGU node itself.
> > 
> >  .../devicetree/bindings/display/snps,arcpgu.txt    | 72 ++++++++++++++++++++++
> >  1 file changed, 72 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt
> > b/Documentation/devicetree/bindings/display/snps,arcpgu.txt
> > new file mode 100644
> > index 0000000..b130924
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt
> > @@ -0,0 +1,72 @@
> > +ARC PGU
> > +
> > +This is a display controller found on several development boards produced
> > +by Synopsys. The ARC PGU is an RGB streamer that reads the data from a
> > +framebuffer and sends it to a single digital encoder (usually HDMI).
> > +
> > +Required properties:
> > +  - compatible: "snps,arcpgu"
> > +  - reg: Physical base address and length of the controller's registers.
> > +  - clocks: A list of phandle + clock-specifier pairs, one for each
> > +    entry in 'clock-names'.
> > +  - clock-names: A list of clock names. For ARC PGU it should contain:
> > +      - "pxlclk" for the clock feeding the output PLL of the controller.
> > +  - encoder-slave: Phandle of encoder chip.
> Drop this as discussed.

Ok I'll do that.
But what about my example below?
Do I need to remove encoder node from it as well?

> > 
> > +
> > +Required sub-nodes:
> > +  - port: The PGU connection to an encoder chip.
> > +
> > +Example:
> > +
> > +/ {
> > +	...
> > +
> > +	pgu@...XXXXX {
> > +		compatible = "snps,arcpgu";
> > +		reg = <0xXXXXXXXX 0x400>;
> > +		clocks = <&clock_node>;
> > +		clock-names = "pxlclk";
> > +		encoder-slave = <&encoder_node>;
> > +
> > +		port {
> > +			pgu_output: endpoint {
> > +				remote-endpoint = <&hdmi_enc_input>;
> > +			};
> > +		};
> > +	};
> > +
> > +	/* HDMI encoder on I2C bus */
> > +	i2c@...XXXXX {
> > +		compatible = "...";
> > +
> > +		encoder_node:encoder_node@...X{
> Don't use underscores in node names. Just "hdmi@xx"

Ok still I may keep label "encoder_node" here, right?

-Alexey