diff --git a/drivers/media/platform/rockchip/cif/capture.c b/drivers/media/platform/rockchip/cif/capture.c
index 8ee8030b5f9a..4fc1119bbbef 100644
--- a/drivers/media/platform/rockchip/cif/capture.c
+++ b/drivers/media/platform/rockchip/cif/capture.c
@@ -8431,6 +8431,16 @@ static void rkcif_attach_sync_mode(struct rkcif_device *cifdev)
 		sync_config->mode = RKCIF_SOFT_SYNC;
 		sync_config->is_attach = true;
 		dev_info(hw->dev, "group used soft sync mode\n");
+	} else if (sync_config->ext_master.count > 1 &&
+		   sync_config->slave.count == 0 &&
+		   sync_config->soft_sync.count == 0) {
+		sync_config->mode = RKCIF_EXT_MASTER;
+		sync_config->is_attach = true;
+	} else if (sync_config->slave.count > 1 &&
+		   sync_config->ext_master.count == 0 &&
+		   sync_config->soft_sync.count == 0) {
+		sync_config->mode = RKCIF_EXT_SLAVE;
+		sync_config->is_attach = true;
 	}
 	mutex_unlock(&hw->dev_lock);
 }
@@ -13978,12 +13988,21 @@ static int rkcif_check_group_sync_state(struct rkcif_device *cif_dev)
 				next_stream = &sync_config->int_master.cif_dev[0]->stream[0];
 		} else if (sync_config->mode == RKCIF_SOFT_SYNC) {
 			next_stream = &sync_config->soft_sync.cif_dev[i]->stream[0];
+		} else if (sync_config->mode == RKCIF_EXT_MASTER) {
+			next_stream = &sync_config->ext_master.cif_dev[i]->stream[0];
+		} else if (sync_config->mode == RKCIF_EXT_SLAVE) {
+			next_stream = &sync_config->slave.cif_dev[i]->stream[0];
 		} else {
 			v4l2_err(&cif_dev->v4l2_dev,
 				 "ERROR: invalid group sync mode\n");
 			ret = -EINVAL;
 			break;
 		}
+		if (next_stream == NULL) {
+			v4l2_err(&cif_dev->v4l2_dev,
+				 "ERROR: invalid stream in  group sync mode\n");
+			break;
+		}
 		if (detect_stream == next_stream)
 			continue;
 		fs_interval = abs(detect_stream->readout.fs_timestamp - next_stream->readout.fs_timestamp);
@@ -14053,6 +14072,10 @@ static void rkcif_deal_sof(struct rkcif_device *cif_dev)
 						tmp_dev = sync_config->slave.cif_dev[i];
 					else
 						tmp_dev = sync_config->int_master.cif_dev[0];
+				} else if (sync_config->mode == RKCIF_EXT_MASTER) {
+					tmp_dev = sync_config->ext_master.cif_dev[i];
+				} else if (sync_config->mode == RKCIF_EXT_SLAVE) {
+					tmp_dev = sync_config->slave.cif_dev[i];
 				} else {
 					v4l2_err(&cif_dev->v4l2_dev,
 						 "ERROR: invalid group sync mode\n");
diff --git a/drivers/media/platform/rockchip/cif/dev.c b/drivers/media/platform/rockchip/cif/dev.c
index 9a127897d9e6..b700cdded444 100644
--- a/drivers/media/platform/rockchip/cif/dev.c
+++ b/drivers/media/platform/rockchip/cif/dev.c
@@ -1516,7 +1516,9 @@ void rkcif_set_sensor_streamon_in_sync_mode(struct rkcif_device *cif_dev)
 
 	if (sync_config->mode == RKCIF_MASTER_MASTER ||
 	    sync_config->mode == RKCIF_MASTER_SLAVE ||
-	    sync_config->mode == RKCIF_SOFT_SYNC) {
+	    sync_config->mode == RKCIF_SOFT_SYNC ||
+	    sync_config->mode == RKCIF_EXT_MASTER ||
+	    sync_config->mode == RKCIF_EXT_SLAVE) {
 		for (i = 0; i < sync_config->slave.count; i++) {
 			dev = sync_config->slave.cif_dev[i];
 			is_streaming = sync_config->slave.is_streaming[i];