diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 806c68823a28720b72fc57591cd02985f9f76114..bc708fb1bc7c80fbe697933c77bff63cc3247f2b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -593,7 +593,6 @@ static void rcar_du_shutdown(struct platform_device *pdev)
 static int rcar_du_probe(struct platform_device *pdev)
 {
 	struct rcar_du_device *rcdu;
-	struct resource *mem;
 	unsigned int mask;
 	int ret;
 
@@ -609,8 +608,7 @@ static int rcar_du_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, rcdu);
 
 	/* I/O resources */
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
+	rcdu->mmio = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(rcdu->mmio))
 		return PTR_ERR(rcdu->mmio);
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
index b672c5bd72ee888764ba58177729b2b3b8ef2378..72a272cfc11ee1292eaf9d8a119f2157652d8dda 100644
--- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
+++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
@@ -813,7 +813,6 @@ static int rcar_lvds_probe(struct platform_device *pdev)
 {
 	const struct soc_device_attribute *attr;
 	struct rcar_lvds *lvds;
-	struct resource *mem;
 	int ret;
 
 	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
@@ -836,8 +835,7 @@ static int rcar_lvds_probe(struct platform_device *pdev)
 	lvds->bridge.funcs = &rcar_lvds_bridge_ops;
 	lvds->bridge.of_node = pdev->dev.of_node;
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);
+	lvds->mmio = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(lvds->mmio))
 		return PTR_ERR(lvds->mmio);