Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20211009115031.18392-1-alistair@alistair23.me> <20211009115031.18392-13-alistair@alistair23.me>
In-Reply-To: <20211009115031.18392-13-alistair@alistair23.me>
From:   Fabio Estevam <festevam@gmail.com>
Date:   Sat, 9 Oct 2021 11:29:10 -0300
Message-ID: <CAOMZO5DK+YSx6iQABFbgR=EKLutRc486GEUeH0o0fYRotmQmXg@mail.gmail.com>
Subject: Re: [PATCH v12 09/10] ARM: imx_v6_v7_defconfig: Enable backlight
 class devices
To:     Alistair Francis <alistair@alistair23.me>
Cc:     Lee Jones <lee.jones@linaro.org>, Rob Herring <robh+dt@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Sascha Hauer <kernel@pengutronix.de>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        NXP Linux Team <linux-imx@nxp.com>, amitk@kernel.org,
        "rui.zhang" <rui.zhang@intel.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Alistair Francis <alistair23@gmail.com>,
        linux-hwmon@vger.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>, linux-pm@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Alistair,

On Sat, Oct 9, 2021 at 8:52 AM Alistair Francis <alistair@alistair23.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@alistair23.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