linux-kernel - Re: [PATCH v2 1/4] ARM: dts: exynos: Enable HDMI for Arndale Octa board

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Date:   Wed, 24 Aug 2016 07:28:38 +0200
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Milo Kim <woogyom.kim@...il.com>, Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <k.kozlowski@...sung.com>,
        David Airlie <airlied@...ux.ie>
Cc:     devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/4] ARM: dts: exynos: Enable HDMI for Arndale Octa board

Hi Milo,

On 08/24/2016 04:25 AM, Milo Kim wrote:
> * Support HDMI display data channel
>   I2C #2 is assigned for the HDMI DDC. It enables the EDID access.
>
> * GPIO for HDMI hot plug detect
>   GPX3_7 is used. The HPD awareness is done when the GPIO is active high and
>   single ended.
>
> * Enable HDMI block in Exynos5420
>   HDMI PLL consumes 1.0V LDO6 (PVDD_ANAIP_1V0) and HDMI oscillator requires
>   1.8V LDO7 (PVDD_ANAIP_1V8).
>
> Cc: Kukjin Kim <kgene@...nel.org>
> Cc: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Inki Dae <inki.dae@...sung.com>
> Cc: Joonyoung Shim <jy0922.shim@...sung.com>
> Cc: Seung-Woo Kim <sw0312.kim@...sung.com>
> Cc: Kyungmin Park <kyungmin.park@...sung.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: devicetree@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-samsung-soc@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: dri-devel@...ts.freedesktop.org
> Signed-off-by: Milo Kim <woogyom.kim@...il.com>
> ---
>  arch/arm/boot/dts/exynos5420-arndale-octa.dts | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
> index 39a3b81..df362a2 100644
> --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
> +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
> @@ -70,6 +70,23 @@
>  	status = "disabled";
>  };
>  
> +&i2c_2 {
> +	samsung,i2c-slave-addr = <0x50>;
> +	status = "okay";
> +
> +	hdmiddc@50 {
> +		compatible = "samsung,exynos4210-hdmiddc";
> +		reg = <0x50>;
> +	};
> +};
> +
> +&hdmi {
> +	hpd-gpios = <&gpx3 7 GPIO_OPEN_SOURCE>;
> +	vdd_osc-supply = <&ldo7_reg>;
> +	vdd_pll-supply = <&ldo6_reg>;
> +	status = "okay";

Please use ddc property in hdmi node, instead of this legacy binding.
See exynos4210-universal_c210.dts or exynos4412-odroid-common.dtsi for
reference.

Regards
Andrzej

> +};
> +
>  &hsi2c_4 {
>  	status = "okay";
>