Hi Philipp and Shawn,
On 15.11.2014 19:49, Vladimir Zapolskiy wrote:
> Provide information about how to bind internal iMX6Q/DL HDMI DDC I2C
> master controller. The property is set as optional one, because iMX6
> HDMI DDC bus may be represented by one of general purpose I2C busses
> found on SoC.
>
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@xxxxxxxxxx>
> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
> Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-media@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-i2c@xxxxxxxxxxxxxxx
> ---
> Documentation/devicetree/bindings/staging/imx-drm/hdmi.txt | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/staging/imx-drm/hdmi.txt b/Documentation/devicetree/bindings/staging/imx-drm/hdmi.txt
> index 1b756cf..43c8924 100644
> --- a/Documentation/devicetree/bindings/staging/imx-drm/hdmi.txt
> +++ b/Documentation/devicetree/bindings/staging/imx-drm/hdmi.txt
> @@ -10,6 +10,8 @@ Required properties:
> - #address-cells : should be <1>
> - #size-cells : should be <0>
> - compatible : should be "fsl,imx6q-hdmi" or "fsl,imx6dl-hdmi".
> + If internal HDMI DDC I2C master controller is supposed to be used,
> + then "simple-bus" should be added to compatible value.
> - gpr : should be <&gpr>.
> The phandle points to the iomuxc-gpr region containing the HDMI
> multiplexer control register.
> @@ -22,6 +24,7 @@ Required properties:
>
> Optional properties:
> - ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing
> + - ddc: internal HDMI DDC I2C master controller
>
> example:
>
> @@ -32,7 +35,7 @@ example:
> hdmi: hdmi@0120000 {
> #address-cells = <1>;
> #size-cells = <0>;
> - compatible = "fsl,imx6q-hdmi";
> + compatible = "fsl,imx6q-hdmi", "simple-bus";
> reg = <0x00120000 0x9000>;
> interrupts = <0 115 0x04>;
> gpr = <&gpr>;
> @@ -40,6 +43,11 @@ example:
> clock-names = "iahb", "isfr";
> ddc-i2c-bus = <&i2c2>;
>
> + hdmi_ddc: ddc {
> + compatible = "fsl,imx6q-hdmi-ddc";
> + status = "disabled";
> + };
> +
> port@0 {
> reg = <0>;
>
>
knowing in advance that I2C framework lacks a graceful support of non
fully compliant I2C devices, do you have any objections to the proposed
iMX HDMI DTS change?
--
With best wishes,
Vladimir
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