From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Date: Tue, 15 May 2018 18:57:36 +0300
Subject: drm: rcar-du: Fix rcar_du_of_init() stub
Git-commit: dd856d924b2471bf28e7c60df881529525a1192c
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

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+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180515155736.3379-1-laurent.pinchart+renesas@ideasonboard.com

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_of.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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) { }