drm: renesas: shmobile: Convert container helpers to static inline functions

Replace to conversion helper macros using container_of() by static
inline functions, to improve type-safety.
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/7d1f1aa4b832499f9e527353ce0ad6d84ff9a74a.1694767209.git.geert+renesas@glider.be

drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c

@@ -258,7 +258,10 @@ static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
 	lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
 }
 
-#define to_shmob_crtc(c)	container_of(c, struct shmob_drm_crtc, crtc)
+static inline struct shmob_drm_crtc *to_shmob_crtc(struct drm_crtc *crtc)
+{
+	return container_of(crtc, struct shmob_drm_crtc, crtc);
+}
 
 static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 {
@@ -538,8 +541,10 @@ int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
  * Connector
  */
 
-#define to_shmob_connector(c) \
-	container_of(c, struct shmob_drm_connector, connector)
+static inline struct shmob_drm_connector *to_shmob_connector(struct drm_connector *connector)
+{
+	return container_of(connector, struct shmob_drm_connector, connector);
+}
 
 static int shmob_drm_connector_get_modes(struct drm_connector *connector)
 {

drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c

@@ -34,7 +34,10 @@ struct shmob_drm_plane {
 	unsigned int crtc_h;
 };
 
-#define to_shmob_plane(p)	container_of(p, struct shmob_drm_plane, plane)
+static inline struct shmob_drm_plane *to_shmob_plane(struct drm_plane *plane)
+{
+	return container_of(plane, struct shmob_drm_plane, plane);
+}
 
 static void shmob_drm_plane_compute_base(struct shmob_drm_plane *splane,
 					 struct drm_framebuffer *fb,