diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index cd6a706..7b1dbb4 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1174,7 +1174,8 @@ static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
 		    HDMI_IH_MUTE_FC_STAT2);
 }
 
-static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
+static int dw_hdmi_setup(struct dw_hdmi *hdmi,
+			 const struct drm_display_mode *mode)
 {
 	int ret;
 
@@ -1341,8 +1342,8 @@ static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
 }
 
 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
-				    struct drm_display_mode *orig_mode,
-				    struct drm_display_mode *mode)
+				    const struct drm_display_mode *orig_mode,
+				    const struct drm_display_mode *mode)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
diff --git a/drivers/gpu/drm/msm/edp/edp_bridge.c b/drivers/gpu/drm/msm/edp/edp_bridge.c
index 2bc73f8..8c09a2e 100644
--- a/drivers/gpu/drm/msm/edp/edp_bridge.c
+++ b/drivers/gpu/drm/msm/edp/edp_bridge.c
@@ -52,8 +52,8 @@ static void edp_bridge_post_disable(struct drm_bridge *bridge)
 }
 
 static void edp_bridge_mode_set(struct drm_bridge *bridge,
-		struct drm_display_mode *mode,
-		struct drm_display_mode *adjusted_mode)
+		const struct drm_display_mode *mode,
+		const struct drm_display_mode *adjusted_mode)
 {
 	struct drm_device *dev = bridge->dev;
 	struct drm_connector *connector;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index a7a1d82..2eb59eb 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -130,16 +130,15 @@ static void hdmi_bridge_post_disable(struct drm_bridge *bridge)
 }
 
 static void hdmi_bridge_mode_set(struct drm_bridge *bridge,
-		 struct drm_display_mode *mode,
-		 struct drm_display_mode *adjusted_mode)
+		 const struct drm_display_mode *drm_mode,
+		 const struct drm_display_mode *adjusted_mode)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
 	struct hdmi *hdmi = hdmi_bridge->hdmi;
+	const struct drm_display_mode *mode = adjusted_mode;
 	int hstart, hend, vstart, vend;
 	uint32_t frame_ctrl;
 
-	mode = adjusted_mode;
-
 	hdmi->pixclock = mode->clock * 1000;
 
 	hdmi->hdmi_mode = drm_match_cea_mode(mode) > 1;
diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index aeb5070..b29272c 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -226,8 +226,8 @@ static void sti_dvo_pre_enable(struct drm_bridge *bridge)
 }
 
 static void sti_dvo_set_mode(struct drm_bridge *bridge,
-			     struct drm_display_mode *mode,
-			     struct drm_display_mode *adjusted_mode)
+			     const struct drm_display_mode *mode,
+			     const struct drm_display_mode *adjusted_mode)
 {
 	struct sti_dvo *dvo = bridge->driver_private;
 	struct sti_mixer *mixer = to_sti_mixer(dvo->encoder->crtc);
diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index a9bbb08..4a15d45 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -459,8 +459,8 @@ static void sti_hda_pre_enable(struct drm_bridge *bridge)
 }
 
 static void sti_hda_set_mode(struct drm_bridge *bridge,
-		struct drm_display_mode *mode,
-		struct drm_display_mode *adjusted_mode)
+		const struct drm_display_mode *mode,
+		const struct drm_display_mode *adjusted_mode)
 {
 	struct sti_hda *hda = bridge->driver_private;
 	u32 mode_idx;
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index 1485ade..fc26a8c 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -527,8 +527,8 @@ static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
 }
 
 static void sti_hdmi_set_mode(struct drm_bridge *bridge,
-		struct drm_display_mode *mode,
-		struct drm_display_mode *adjusted_mode)
+		const struct drm_display_mode *mode,
+		const struct drm_display_mode *adjusted_mode)
 {
 	struct sti_hdmi *hdmi = bridge->driver_private;
 	int ret;
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index c735884..8514055 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -438,7 +438,8 @@ int tilcdc_crtc_max_width(struct drm_crtc *crtc)
 	return max_width;
 }
 
-int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode)
+int tilcdc_crtc_mode_valid(struct drm_crtc *crtc,
+			   const struct drm_display_mode *mode)
 {
 	struct tilcdc_drm_private *priv = crtc->dev->dev_private;
 	unsigned int bandwidth;
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
index 7596c14..f53c278 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.h
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
@@ -166,7 +166,8 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
 void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
 void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
 		const struct tilcdc_panel_info *info);
-int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
+int tilcdc_crtc_mode_valid(struct drm_crtc *crtc,
+		const struct drm_display_mode *mode);
 int tilcdc_crtc_max_width(struct drm_crtc *crtc);
 
 #endif /* __TILCDC_DRV_H__ */
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 2e80ad1..dbc1510 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -886,8 +886,8 @@ struct drm_bridge_funcs {
 	void (*disable)(struct drm_bridge *bridge);
 	void (*post_disable)(struct drm_bridge *bridge);
 	void (*mode_set)(struct drm_bridge *bridge,
-			 struct drm_display_mode *mode,
-			 struct drm_display_mode *adjusted_mode);
+			 const struct drm_display_mode *mode,
+			 const struct drm_display_mode *adjusted_mode);
 	void (*pre_enable)(struct drm_bridge *bridge);
 	void (*enable)(struct drm_bridge *bridge);
 };
