diff --git a/msm/sde/sde_encoder.c b/msm/sde/sde_encoder.c
index 76d8e779b127..14da4f5d952e 100644
--- a/msm/sde/sde_encoder.c
+++ b/msm/sde/sde_encoder.c
@@ -919,6 +919,12 @@ static int _sde_encoder_atomic_check_reserve(struct drm_encoder *drm_enc,
 			return ret;
 		}
 
+		/* Skip RM allocation for Primary during CWB usecase */
+		if (!crtc_state->mode_changed && !crtc_state->active_changed &&
+			crtc_state->connectors_changed && (conn_state->crtc ==
+			conn_state->connector->state->crtc))
+			goto skip_reserve;
+
 		/* Reserve dynamic resources, indicating atomic_check phase */
 		ret = sde_rm_reserve(&sde_kms->rm, drm_enc, crtc_state,
 			conn_state, true);
@@ -929,6 +935,7 @@ static int _sde_encoder_atomic_check_reserve(struct drm_encoder *drm_enc,
 			return ret;
 		}
 
+skip_reserve:
 		/**
 		 * Update connector state with the topology selected for the
 		 * resource set validated. Reset the topology if we are