SRC_CNTL
regw(sc, SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT);
regw(sc, SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT);
regw(sc, SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT);
regw(sc, SRC_CNTL, SRC_LINE_X_RIGHT_TO_LEFT);
regw(sc, SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT);
regw(sc, SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT);