diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c
index a640af22eafc..e5662412db9b 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_cmd_encoder.c
@@ -158,46 +158,4 @@ void mdp5_cmd_encoder_enable(struct drm_encoder *encoder)
 
 	mdp5_cmd_enc->enabled = true;
 }
-
-int mdp5_cmd_encoder_set_split_display(struct drm_encoder *encoder,
-				       struct drm_encoder *slave_encoder)
-{
-	struct mdp5_encoder *mdp5_cmd_enc = to_mdp5_encoder(encoder);
-	struct mdp5_kms *mdp5_kms;
-	struct device *dev;
-	int intf_num;
-	u32 data = 0;
-
-	if (!encoder || !slave_encoder)
-		return -EINVAL;
-
-	mdp5_kms = get_kms(encoder);
-	intf_num = mdp5_cmd_enc->intf->num;
-
-	/* Switch slave encoder's trigger MUX, to use the master's
-	 * start signal for the slave encoder
-	 */
-	if (intf_num == 1)
-		data |= MDP5_SPLIT_DPL_UPPER_INTF2_SW_TRG_MUX;
-	else if (intf_num == 2)
-		data |= MDP5_SPLIT_DPL_UPPER_INTF1_SW_TRG_MUX;
-	else
-		return -EINVAL;
-
-	/* Smart Panel, Sync mode */
-	data |= MDP5_SPLIT_DPL_UPPER_SMART_PANEL;
-
-	dev = &mdp5_kms->pdev->dev;
-
-	/* Make sure clocks are on when connectors calling this function. */
-	pm_runtime_get_sync(dev);
-	mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_UPPER, data);
-
-	mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_LOWER,
-		   MDP5_SPLIT_DPL_LOWER_SMART_PANEL);
-	mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_EN, 1);
-	pm_runtime_put_sync(dev);
-
-	return 0;
-}
 #endif /* CONFIG_DRM_MSM_DSI */
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c
index 79d67c495780..7c2092ca4040 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_encoder.c
@@ -274,48 +274,6 @@ u32 mdp5_encoder_get_framecount(struct drm_encoder *encoder)
 	return mdp5_read(mdp5_kms, REG_MDP5_INTF_FRAME_COUNT(intf));
 }
 
-int mdp5_vid_encoder_set_split_display(struct drm_encoder *encoder,
-				       struct drm_encoder *slave_encoder)
-{
-	struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
-	struct mdp5_encoder *mdp5_slave_enc = to_mdp5_encoder(slave_encoder);
-	struct mdp5_kms *mdp5_kms;
-	struct device *dev;
-	int intf_num;
-	u32 data = 0;
-
-	if (!encoder || !slave_encoder)
-		return -EINVAL;
-
-	mdp5_kms = get_kms(encoder);
-	intf_num = mdp5_encoder->intf->num;
-
-	/* Switch slave encoder's TimingGen Sync mode,
-	 * to use the master's enable signal for the slave encoder.
-	 */
-	if (intf_num == 1)
-		data |= MDP5_SPLIT_DPL_LOWER_INTF2_TG_SYNC;
-	else if (intf_num == 2)
-		data |= MDP5_SPLIT_DPL_LOWER_INTF1_TG_SYNC;
-	else
-		return -EINVAL;
-
-	dev = &mdp5_kms->pdev->dev;
-	/* Make sure clocks are on when connectors calling this function. */
-	pm_runtime_get_sync(dev);
-
-	/* Dumb Panel, Sync mode */
-	mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_UPPER, 0);
-	mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_LOWER, data);
-	mdp5_write(mdp5_kms, REG_MDP5_SPLIT_DPL_EN, 1);
-
-	mdp5_ctl_pair(mdp5_encoder->ctl, mdp5_slave_enc->ctl, true);
-
-	pm_runtime_put_sync(dev);
-
-	return 0;
-}
-
 void mdp5_encoder_set_intf_mode(struct drm_encoder *encoder, bool cmd_mode)
 {
 	struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 11d9fc2c6bf5..22f2d2ec4a9c 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -190,19 +190,6 @@ static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
 		mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
 }
 
-static int mdp5_set_split_display(struct msm_kms *kms,
-		struct drm_encoder *encoder,
-		struct drm_encoder *slave_encoder,
-		bool is_cmd_mode)
-{
-	if (is_cmd_mode)
-		return mdp5_cmd_encoder_set_split_display(encoder,
-							slave_encoder);
-	else
-		return mdp5_vid_encoder_set_split_display(encoder,
-							  slave_encoder);
-}
-
 static void mdp5_destroy(struct mdp5_kms *mdp5_kms);
 
 static void mdp5_kms_destroy(struct msm_kms *kms)
@@ -275,7 +262,6 @@ static const struct mdp_kms_funcs kms_funcs = {
 		.wait_flush      = mdp5_wait_flush,
 		.complete_commit = mdp5_complete_commit,
 		.get_format      = mdp_get_format,
-		.set_split_display = mdp5_set_split_display,
 		.destroy         = mdp5_kms_destroy,
 #ifdef CONFIG_DEBUG_FS
 		.debugfs_init    = mdp5_kms_debugfs_init,
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h
index 29bf11f08601..ee68e9913f8c 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h
@@ -291,8 +291,6 @@ struct drm_crtc *mdp5_crtc_init(struct drm_device *dev,
 
 struct drm_encoder *mdp5_encoder_init(struct drm_device *dev,
 		struct mdp5_interface *intf, struct mdp5_ctl *ctl);
-int mdp5_vid_encoder_set_split_display(struct drm_encoder *encoder,
-				       struct drm_encoder *slave_encoder);
 void mdp5_encoder_set_intf_mode(struct drm_encoder *encoder, bool cmd_mode);
 int mdp5_encoder_get_linecount(struct drm_encoder *encoder);
 u32 mdp5_encoder_get_framecount(struct drm_encoder *encoder);
@@ -303,8 +301,6 @@ void mdp5_cmd_encoder_mode_set(struct drm_encoder *encoder,
 			       struct drm_display_mode *adjusted_mode);
 void mdp5_cmd_encoder_disable(struct drm_encoder *encoder);
 void mdp5_cmd_encoder_enable(struct drm_encoder *encoder);
-int mdp5_cmd_encoder_set_split_display(struct drm_encoder *encoder,
-				       struct drm_encoder *slave_encoder);
 #else
 static inline void mdp5_cmd_encoder_mode_set(struct drm_encoder *encoder,
 					     struct drm_display_mode *mode,
@@ -317,11 +313,6 @@ static inline void mdp5_cmd_encoder_disable(struct drm_encoder *encoder)
 static inline void mdp5_cmd_encoder_enable(struct drm_encoder *encoder)
 {
 }
-static inline int mdp5_cmd_encoder_set_split_display(
-	struct drm_encoder *encoder, struct drm_encoder *slave_encoder)
-{
-	return -EINVAL;
-}
 #endif
 
 #endif /* __MDP5_KMS_H__ */
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index 44aa435d68ce..0641f6111b93 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -105,10 +105,6 @@ struct msm_kms_funcs {
 	/* misc: */
 	long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,
 			struct drm_encoder *encoder);
-	int (*set_split_display)(struct msm_kms *kms,
-			struct drm_encoder *encoder,
-			struct drm_encoder *slave_encoder,
-			bool is_cmd_mode);
 	/* cleanup: */
 	void (*destroy)(struct msm_kms *kms);
 
