Re: [PATCH] drm/rockchip: add extcon dependency for DP

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On Tue, Feb 14, 2017 at 1:31 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> The newly added DP driver links against the extcon core, which fails when
> extcon is a module and this driver is not:
>
> drivers/gpu/drm/rockchip/cdn-dp-core.o: In function `cdn_dp_get_port_lanes':
> cdn-dp-core.c:(.text.cdn_dp_get_port_lanes+0x24): undefined reference to `extcon_get_state'
> cdn-dp-core.c:(.text.cdn_dp_get_port_lanes+0x44): undefined reference to `extcon_get_property'
>
> Let's make Kconfig enforce correct behavior with a dependency.
>
> Fixes: 1a0f7ed3abe2 ("drm/rockchip: cdn-dp: add cdn DP support for rk3399")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Reviewed-by: Guenter Roeck <groeck@xxxxxxxxxxxx>

> ---
>  drivers/gpu/drm/rockchip/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
> index ad31b3eb408f..0e4eb845cbb0 100644
> --- a/drivers/gpu/drm/rockchip/Kconfig
> +++ b/drivers/gpu/drm/rockchip/Kconfig
> @@ -24,6 +24,7 @@ config ROCKCHIP_ANALOGIX_DP
>  config ROCKCHIP_CDN_DP
>          tristate "Rockchip cdn DP"
>          depends on DRM_ROCKCHIP
> +       depends on EXTCON
>         select SND_SOC_HDMI_CODEC if SND_SOC
>          help
>           This selects support for Rockchip SoC specific extensions
> --
> 2.9.0
>
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