linux-kernel - Re: [PATCH v2 1/8] doc: DT: vidc: binding document for Qualcomm video driver

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Date:   Fri, 16 Sep 2016 09:19:39 -0500
From:   Rob Herring <robh@...nel.org>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Andy Gross <andy.gross@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/8] doc: DT: vidc: binding document for Qualcomm
 video driver

On Wed, Sep 07, 2016 at 02:37:02PM +0300, Stanimir Varbanov wrote:
> Adds binding document for vidc video encoder/decoder driver
> 
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
> ---
>  .../devicetree/bindings/media/qcom,vidc.txt        | 61 ++++++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/qcom,vidc.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/qcom,vidc.txt b/Documentation/devicetree/bindings/media/qcom,vidc.txt
> new file mode 100644
> index 000000000000..0d50a7b2e3ed
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/qcom,vidc.txt
> @@ -0,0 +1,61 @@
> +* Qualcomm video encoder/decoder accelerator
> +
> +- compatible:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: Value should contain

... one of:

> +			- "qcom,vidc-msm8916"
> +			- "qcom,vidc-msm8996"
> +- reg:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: Register ranges as listed in the reg-names property
> +
> +- interrupts:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition:

How many interrupts?

> +
> +- power-domains:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: A phandle and power domain specifier pairs to the
> +		    power domain which is responsible for collapsing
> +		    and restoring power to the peripheral

How many power domains?

> +
> +- clocks:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: List of phandle and clock specifier pairs as listed
> +		    in clock-names property
> +- clock-names:
> +	Usage: required
> +	Value type: <stringlist>
> +	Definition: Should contain the following entries
> +			- "core"  Core video accelerator clock
> +			- "iface" Video accelerator AHB clock
> +			- "bus"	  Video accelerator AXI clock
> +- rproc:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: A phandle to remote processor responsible for
> +		    firmware loading
> +
> +- iommus:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: A list of phandle and IOMMU specifier pairs
> +
> +* An Example
> +	qcom,vidc@...0000 {

node names should be generic: video-codec@

> +		compatible = "qcom,vidc-msm8916";
> +		reg = <0x01d00000 0xff000>;
> +		clocks = <&gcc GCC_VENUS0_VCODEC0_CLK>,
> +			 <&gcc GCC_VENUS0_AHB_CLK>,
> +			 <&gcc GCC_VENUS0_AXI_CLK>;
> +		clock-names = "core", "iface", "bus";
> +		interrupts = <GIC_SPI 44 0>;
> +		power-domains = <&gcc VENUS_GDSC>;
> +		rproc = <&vidc_rproc>;
> +		iommus = <&apps_iommu 5>;
> +	};
> -- 
> 2.7.4
>