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From:   Fabio Estevam <festevam@gmail.com>
Date:   Tue, 12 Nov 2019 20:17:33 -0300
Message-ID: <CAOMZO5DX_-zSHJjDigK2c=dVLEMxvfd_dFCu=0fbyjht1gsr=A@mail.gmail.com>
Subject: Re: [PATCHv7 2/3] ARM: dts: Add support for i.MX6 UltraLite DART
 Variscite Customboard
To:     Oliver Graute <oliver.graute@gmail.com>
Cc:     Shawn Guo <shawnguo@kernel.org>,
        Marco Felsch <m.felsch@pengutronix.de>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        NXP Linux Team <linux-imx@nxp.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>
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Sender: linux-kernel-owner@vger.kernel.org
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Hi Oliver,

On Tue, Nov 12, 2019 at 4:22 PM Oliver Graute <oliver.graute@gmail.com> wrote:

> +&lcdif {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pinctrl_lcdif>;
> +       display = <&display0>;
> +       status = "okay";
> +
> +       display0: display0 {
> +               bits-per-pixel = <16>;
> +               bus-width = <24>;
> +
> +               display-timings {
> +                       native-mode = <&timing0>;
> +                       timing0: timing0 {
> +                               clock-frequency =<35000000>;
> +                               hactive = <800>;
> +                               vactive = <480>;
> +                               hfront-porch = <40>;
> +                               hback-porch = <40>;
> +                               hsync-len = <48>;
> +                               vback-porch = <29>;
> +                               vfront-porch = <13>;
> +                               vsync-len = <3>;
> +                               hsync-active = <0>;
> +                               vsync-active = <0>;
> +                               de-active = <1>;
> +                               pixelclk-active = <0>;
> +                       };
> +               };
> +       };
> +};

You are using the deprecated bindings.

Please switch to the DRM bindings as stated at
Documentation/devicetree/bindings/display/mxsfb.txt

You should also add your panel to the simple panel driver.