Hi Laurent Thanks for identifying this fault and posting the fix.
(+linux-renesas-soc)
On 15/05/18 16:57, Laurent Pinchart wrote:
> The rcar_du_of_init() function is supposed to be defined as a stub when
> CONFIG_DRM_RCAR_LVDS is disabled as the rcar_du_of.c file isn't compiled
> in that case. However, a bug in the configuration option check makes it
> a stub when CONFIG_DRM_RCAR_LVDS=m as well, which prevents legacy DTs
> from being fixed at boot time. Fix the configuration option check by
> using IS_ENABLED.
>
> Fixes: 81c0e3dd8292 ("drm: rcar-du: Fix legacy DT to create LVDS encoder
> nodes")
> Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
> ---
> drivers/gpu/drm/rcar-du/rcar_du_of.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.h
> b/drivers/gpu/drm/rcar-du/rcar_du_of.h
> index c2e65a727e91..8dd3fbe96650 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_of.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of.h
> @@ -11,7 +11,7 @@
>
> struct of_device_id;
>
> -#ifdef CONFIG_DRM_RCAR_LVDS
> +#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
> void __init rcar_du_of_init(const struct of_device_id *of_ids);
> #else
> static inline void rcar_du_of_init(const struct of_device_id *of_ids) { }
>
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