diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 092275d..b2256e5 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -1733,6 +1733,8 @@ radeon_atom_encoder_dpms_ext(struct drm_encoder *encoder,
 	}
 }
 
+extern void rv6xx_reset_lvtm_data_sync(struct radeon_device *rdev);
+
 static void
 radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
 {
@@ -1744,6 +1746,14 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
 	DRM_DEBUG_KMS("encoder dpms %d to mode %d, devices %08x, active_devices %08x\n",
 		  radeon_encoder->encoder_id, mode, radeon_encoder->devices,
 		  radeon_encoder->active_device);
+
+	switch (radeon_encoder->encoder_id) {
+	case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
+	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+		rv6xx_reset_lvtm_data_sync(rdev);
+		break;
+	}
+
 	switch (radeon_encoder->encoder_id) {
 	case ENCODER_OBJECT_ID_INTERNAL_TMDS1:
 	case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
diff --git a/drivers/gpu/drm/radeon/rv6xx_dpm.c b/drivers/gpu/drm/radeon/rv6xx_dpm.c
index 363018c..e5bcb90 100644
--- a/drivers/gpu/drm/radeon/rv6xx_dpm.c
+++ b/drivers/gpu/drm/radeon/rv6xx_dpm.c
@@ -1482,7 +1482,7 @@ static void rv6xx_enable_spread_spectrum(struct radeon_device *rdev,
 	}
 }
 
-static void rv6xx_reset_lvtm_data_sync(struct radeon_device *rdev)
+void rv6xx_reset_lvtm_data_sync(struct radeon_device *rdev)
 {
 	if (ASIC_IS_DCE3(rdev))
 		WREG32_P(DCE3_LVTMA_DATA_SYNCHRONIZATION, LVTMA_PFREQCHG, ~LVTMA_PFREQCHG);