linux-kernel - Re: [PATCH] drm/panel: ld9040: add backlight Kconfig dependency

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Message-ID: <20230724171108.GA692753@ravnborg.org>
Date:   Mon, 24 Jul 2023 19:11:08 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Neil Armstrong <neil.armstrong@...aro.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Paul Cercueil <paul@...pouillou.net>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/panel: ld9040: add backlight Kconfig dependency

On Mon, Jul 24, 2023 at 02:17:05PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The driver now uses the backlight interface, which breaks when that
> is disabled:
> 
> ld.lld: error: undefined symbol: devm_backlight_device_register
> 
> Enforce the necessary Kconfig dependency to avoid this.
> 
> Fixes: c2268daa65fb4 ("drm/panel: ld9040: Register a backlight device")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>

I expect that someone else with drm-misc rights apply the patch.

	Sam