diff --git a/drivers/gpu/drm/sti/sti_compositor.c b/drivers/gpu/drm/sti/sti_compositor.c
index 063f82d23d80c4ba83624a0066a18416a2b37351..7aefce6706ba2cd7d97a33228c9b9812edecf06f 100644
--- a/drivers/gpu/drm/sti/sti_compositor.c
+++ b/drivers/gpu/drm/sti/sti_compositor.c
@@ -177,7 +177,6 @@ static int sti_compositor_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct device_node *vtg_np;
 	struct sti_compositor *compo;
-	struct resource *res;
 	unsigned int i;
 
 	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
@@ -194,14 +193,7 @@ static int sti_compositor_probe(struct platform_device *pdev)
 
 	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
 	       sizeof(struct sti_compositor_data));
-
-	/* Get Memory ressources */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		DRM_ERROR("Get memory resource failed\n");
-		return -ENXIO;
-	}
-	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
+	compo->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (compo->regs == NULL) {
 		DRM_ERROR("Register mapping failed\n");
 		return -ENXIO;
diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index c6c2abaa1891cd3ea025805b50d275ec314512c3..660588f01f90950a9b2c180ab230188c19901f26 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -511,7 +511,6 @@ static int sti_dvo_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct sti_dvo *dvo;
-	struct resource *res;
 	struct device_node *np = dev->of_node;
 
 	DRM_INFO("%s\n", __func__);
@@ -523,14 +522,7 @@ static int sti_dvo_probe(struct platform_device *pdev)
 	}
 
 	dvo->dev = pdev->dev;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvo-reg");
-	if (!res) {
-		DRM_ERROR("Invalid dvo resource\n");
-		return -ENOMEM;
-	}
-	dvo->regs = devm_ioremap(dev, res->start,
-			resource_size(res));
+	dvo->regs = devm_platform_ioremap_resource_byname(pdev, "dvo-reg");
 	if (!dvo->regs)
 		return -ENOMEM;
 
diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index b12863bea95559c4f874eb94cea8938609d435d4..28fde4c568d0069ecf2f2f69f5be0e87c1d5f4f3 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -741,7 +741,6 @@ static int sti_hda_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct sti_hda *hda;
-	struct resource *res;
 
 	DRM_INFO("%s\n", __func__);
 
@@ -750,14 +749,7 @@ static int sti_hda_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	hda->dev = pdev->dev;
-
-	/* Get resources */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hda-reg");
-	if (!res) {
-		DRM_ERROR("Invalid hda resource\n");
-		return -ENOMEM;
-	}
-	hda->regs = devm_ioremap(dev, res->start, resource_size(res));
+	hda->regs = devm_platform_ioremap_resource_byname(pdev, "hda-reg");
 	if (!hda->regs)
 		return -ENOMEM;
 
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index ca2fe17de4a5d1e0199e59a97e6c7601e139ed9e..666143c48b0d0f2c20cd26323ddbc8e69d966622 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -1380,7 +1380,6 @@ static int sti_hdmi_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct sti_hdmi *hdmi;
 	struct device_node *np = dev->of_node;
-	struct resource *res;
 	struct device_node *ddc;
 	int ret;
 
@@ -1399,15 +1398,7 @@ static int sti_hdmi_probe(struct platform_device *pdev)
 	}
 
 	hdmi->dev = pdev->dev;
-
-	/* Get resources */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
-	if (!res) {
-		DRM_ERROR("Invalid hdmi resource\n");
-		ret = -ENOMEM;
-		goto release_adapter;
-	}
-	hdmi->regs = devm_ioremap(dev, res->start, resource_size(res));
+	hdmi->regs = devm_platform_ioremap_resource_byname(pdev, "hdmi-reg");
 	if (!hdmi->regs) {
 		ret = -ENOMEM;
 		goto release_adapter;
diff --git a/drivers/gpu/drm/sti/sti_hqvdp.c b/drivers/gpu/drm/sti/sti_hqvdp.c
index 0f658709c9d0d398c4eed65202443db9d0b41f8c..420395598d119a403d531211022e6005d6a2bd59 100644
--- a/drivers/gpu/drm/sti/sti_hqvdp.c
+++ b/drivers/gpu/drm/sti/sti_hqvdp.c
@@ -1356,7 +1356,6 @@ static int sti_hqvdp_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *vtg_np;
 	struct sti_hqvdp *hqvdp;
-	struct resource *res;
 
 	DRM_DEBUG_DRIVER("\n");
 
@@ -1367,14 +1366,7 @@ static int sti_hqvdp_probe(struct platform_device *pdev)
 	}
 
 	hqvdp->dev = dev;
-
-	/* Get Memory resources */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		DRM_ERROR("Get memory resource failed\n");
-		return -ENXIO;
-	}
-	hqvdp->regs = devm_ioremap(dev, res->start, resource_size(res));
+	hqvdp->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (!hqvdp->regs) {
 		DRM_ERROR("Register mapping failed\n");
 		return -ENXIO;
diff --git a/drivers/gpu/drm/sti/sti_tvout.c b/drivers/gpu/drm/sti/sti_tvout.c
index af6c06f448c4819def8cc0d0836e30f991529690..0bebe815f5e7567f84388af93723a6fa7d2cc7a2 100644
--- a/drivers/gpu/drm/sti/sti_tvout.c
+++ b/drivers/gpu/drm/sti/sti_tvout.c
@@ -838,7 +838,6 @@ static int sti_tvout_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *node = dev->of_node;
 	struct sti_tvout *tvout;
-	struct resource *res;
 
 	DRM_INFO("%s\n", __func__);
 
@@ -850,14 +849,7 @@ static int sti_tvout_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	tvout->dev = dev;
-
-	/* get memory resources */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
-	if (!res) {
-		DRM_ERROR("Invalid glue resource\n");
-		return -ENOMEM;
-	}
-	tvout->regs = devm_ioremap(dev, res->start, resource_size(res));
+	tvout->regs = devm_platform_ioremap_resource_byname(pdev, "tvout-reg");
 	if (!tvout->regs)
 		return -ENOMEM;
 
diff --git a/drivers/gpu/drm/sti/sti_vtg.c b/drivers/gpu/drm/sti/sti_vtg.c
index 5ba469b711b5318e9e9e6d8df127fb8933d1fac1..b5353fe774d72fd629ecd3ef75a5d2817ca8617f 100644
--- a/drivers/gpu/drm/sti/sti_vtg.c
+++ b/drivers/gpu/drm/sti/sti_vtg.c
@@ -380,20 +380,12 @@ static int vtg_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct sti_vtg *vtg;
-	struct resource *res;
 	int ret;
 
 	vtg = devm_kzalloc(dev, sizeof(*vtg), GFP_KERNEL);
 	if (!vtg)
 		return -ENOMEM;
-
-	/* Get Memory ressources */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		DRM_ERROR("Get memory resource failed\n");
-		return -ENOMEM;
-	}
-	vtg->regs = devm_ioremap(dev, res->start, resource_size(res));
+	vtg->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (!vtg->regs) {
 		DRM_ERROR("failed to remap I/O memory\n");
 		return -ENOMEM;
