diff --git a/msm/sde/sde_connector.c b/msm/sde/sde_connector.c
index 4b958673..5afcf474 100644
--- a/msm/sde/sde_connector.c
+++ b/msm/sde/sde_connector.c
@@ -1728,6 +1728,20 @@ static int _sde_connector_set_prop_dyn_transfer_time(struct sde_connector *c_con
 	return rc;
 }
 
+static void _sde_connector_handle_dpms_off(struct sde_connector *c_conn, uint64_t val)
+{
+	/* suspend case: clear stale MISR */
+	if (val == SDE_MODE_DPMS_OFF) {
+		memset(&c_conn->previous_misr_sign, 0, sizeof(struct sde_misr_sign));
+
+		/* reset backlight scale of LTM */
+		if (c_conn->bl_scale_sv != MAX_SV_BL_SCALE_LEVEL) {
+			c_conn->bl_scale_sv = MAX_SV_BL_SCALE_LEVEL;
+			c_conn->bl_scale_dirty = true;
+		}
+	}
+}
+
 static int sde_connector_atomic_set_property(struct drm_connector *connector,
 		struct drm_connector_state *state,
 		struct drm_property *property,
@@ -1823,9 +1837,7 @@ static int sde_connector_atomic_set_property(struct drm_connector *connector,
 		_sde_connector_set_prop_dyn_transfer_time(c_conn, val);
 		break;
 	case CONNECTOR_PROP_LP:
-		/* suspend case: clear stale MISR */
-		if (val == SDE_MODE_DPMS_OFF)
-			memset(&c_conn->previous_misr_sign, 0, sizeof(struct sde_misr_sign));
+		_sde_connector_handle_dpms_off(c_conn, val);
 		break;
 	default:
 		break;