diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 1a0691c245ec..8fa6546825e5 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -1188,6 +1188,7 @@ static int rockchip_drm_fault_handler(struct iommu_domain *iommu,
 	struct rockchip_drm_private *priv = drm_dev->dev_private;
 	struct drm_crtc *crtc;
 
+	DRM_ERROR("iommu fault handler flags: 0x%x\n", flags);
 	drm_for_each_crtc(crtc, drm_dev) {
 		int pipe = drm_crtc_index(crtc);
 
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index d00a5818f91f..36378cb1d619 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -2388,10 +2388,10 @@ static void vop_crtc_regs_dump(struct drm_crtc *crtc, struct seq_file *s)
 	if (!crtc_state->active)
 		return;
 
-	for (i = 0; i < dump_len; i += 4) {
-		if (i % 16 == 0)
-			DEBUG_PRINT("\n0x%08x: ", i);
-		DEBUG_PRINT("%08x ", vop_readl(vop, i));
+	for (i = 0; i < dump_len; i += 16) {
+		DEBUG_PRINT("0x%08x: %08x %08x %08x %08x\n", i,
+			    vop_readl(vop, i), vop_readl(vop, i + 4),
+			    vop_readl(vop, i + 8), vop_readl(vop, i + 12));
 	}
 }