linux-kernel - Re: [PATCH v12 09/10] ARM: imx_v6_v7_defconfig: Enable backlight class devices

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Date:   Sat, 9 Oct 2021 11:29:10 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Alistair Francis <alistair@...stair23.me>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>, amitk@...nel.org,
        "rui.zhang" <rui.zhang@...el.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Alistair Francis <alistair23@...il.com>,
        linux-hwmon@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v12 09/10] ARM: imx_v6_v7_defconfig: Enable backlight
 class devices

Hi Alistair,

On Sat, Oct 9, 2021 at 8:52 AM Alistair Francis <alistair@...stair23.me> wrote:
>
> The BACKLIGHT_CLASS_DEVICE config is required for the already enabled
> DRM_SIMPLE_PANEL to work so let's enable BACKLIGHT_CLASS_DEVICE.
>
> This allows the mxsfb probe to complete successfully on the reMarkable
> 2.
>
> Signed-off-by: Alistair Francis <alistair@...stair23.me>

With the commit below applied,  CONFIG_BACKLIGHT_CLASS_DEVICE is
automatically selected:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/arch/arm/configs/imx_v6_v7_defconfig?h=next-20211008&id=c54467482ffd407a4404c990697f432bfcb6cdc4