Re: [PATCH] drm/panel: rm68200: add backlight dependency

[Thierry Reding]

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 <arnd@xxxxxxxx>
> ---
>  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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