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drm/panel: ld9040: add backlight Kconfig dependency

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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: c2268daa65 ("drm/panel: ld9040: Register a backlight device")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230724121736.1293270-1-arnd@kernel.org
This commit is contained in:
Arnd Bergmann 2023-07-24 14:17:05 +02:00 committed by Paul Cercueil
parent 9c053ef5c8
commit b30cb96623
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drivers/gpu/drm/panel/Kconfig
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@ -300,6 +300,7 @@ config DRM_PANEL_LEADTEK_LTK500HD1829
config DRM_PANEL_SAMSUNG_LD9040
tristate "Samsung LD9040 RGB/SPI panel"
depends on OF && SPI
depends on BACKLIGHT_CLASS_DEVICE
select VIDEOMODE_HELPERS
config DRM_PANEL_LG_LB035Q02