linux-kernel - Re: [PATCH 12/12] ARM: dts: exynos5250-arndale: add dsi and panel nodes

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Message-ID: <CAJKOXPc6Wxcs2XYKGRXT7_G8ENzgJT1ocWAqviNs1D-mGBoF7w@mail.gmail.com>
Date:   Mon, 28 May 2018 18:41:45 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Maciej Purski <m.purski@...sung.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        Kukjin Kim <kgene@...nel.org>,
        Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Inki Dae <inki.dae@...sung.com>,
        Joonyoung Shim <jy0922.shim@...sung.com>,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH 12/12] ARM: dts: exynos5250-arndale: add dsi and panel nodes

On Mon, May 28, 2018 at 11:55 AM, Maciej Purski <m.purski@...sung.com> wrote:
> The patch adds bridge and panel nodes.
> It adds also DSI properties specific for arndale board.
>
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> Signed-off-by: Maciej Purski <m.purski@...sung.com>
> ---
>  arch/arm/boot/dts/exynos5250-arndale.dts | 39 ++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
> index 80221fa..6f0b1c4 100644
> --- a/arch/arm/boot/dts/exynos5250-arndale.dts
> +++ b/arch/arm/boot/dts/exynos5250-arndale.dts
> @@ -71,6 +71,17 @@
>                 };
>         };
>
> +       panel: panel {
> +               compatible = "boe,hv070wsa-100";
> +               power-supply = <&vcc_3v3_reg>;
> +               enable-gpios = <&gpd1 3 GPIO_ACTIVE_HIGH>;
> +               port {
> +                       panel_ep: endpoint {
> +                               remote-endpoint = <&bridge_out_ep>;
> +                       };
> +               };
> +       };
> +
>         regulators {
>                 compatible = "simple-bus";
>                 #address-cells = <1>;
> @@ -476,6 +487,34 @@
>         };
>  };
>
> +&dsi_0 {

Please put the node alphabetically, so before &dp.

Also this patch should be squashed with previous one (regulators),
because adding non-controllable fixed regulators on its own does not
bring benefits. Linux will not disable them. You added these
regulators for the bridge below. Without the bridge, their existence
does not have much sense.

Best regards,
Krzysztof

> +       vddcore-supply = <&ldo8_reg>;
> +       vddio-supply = <&ldo10_reg>;
> +       samsung,pll-clock-frequency = <24000000>;
> +       samsung,burst-clock-frequency = <320000000>;
> +       samsung,esc-clock-frequency = <10000000>;
> +       status = "okay";
> +
> +       bridge@0 {
> +               reg = <0>;
> +               compatible = "toshiba,tc358764";
> +               vddc-supply = <&vcc_1v2_reg>;
> +               vddio-supply = <&vcc_1v8_reg>;
> +               vddmipi-supply = <&vcc_1v2_reg>;
> +               vddlvds133-supply = <&vcc_3v3_reg>;
> +               vddlvds112-supply = <&vcc_1v2_reg>;
> +               reset-gpios = <&gpd1 6 GPIO_ACTIVE_LOW>;
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               port@1 {
> +                       reg = <1>;
> +                       bridge_out_ep: endpoint {
> +                               remote-endpoint = <&panel_ep>;
> +                       };
> +               };
> +       };
> +};
> +
>  &i2c_2 {
>         status = "okay";
>         /* used by HDMI DDC */
> --
> 2.7.4
>