On Tue, Mar 13, 2018 at 09:59:54PM +0100, Arnd Bergmann wrote:
> Like many other panel drivers, this one fails to build
> when backlight support is disabled:
>
> drivers/gpu/drm/panel/panel-raydium-rm68200.o: In function `rm68200_probe':
> panel-raydium-rm68200.c:(.text+0x14a): undefined reference to
> `devm_of_find_backlight'
>
> This adds the appropriate dependency.
>
> Fixes: 2b7ed18bed1a ("drm/panel: Add support for Raydium RM68200 panel
> driver")
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
> drivers/gpu/drm/panel/Kconfig | 1 +
> 1 file changed, 1 insertion(+)This shouldn't be necessary. include/linux/backlight.h defines a stub if the backlight class is not enabled. What tree are you seeing this on? Thierry
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