tb_port_width_supported
margining->asym_rx = tb_port_width_supported(port, TB_LINK_WIDTH_ASYM_RX);
if (!tb_port_width_supported(up, TB_LINK_WIDTH_DUAL) ||
!tb_port_width_supported(down, TB_LINK_WIDTH_DUAL))
if (!tb_port_width_supported(up, width_up) ||
!tb_port_width_supported(down, width_down))
return tb_port_width_supported(port, width);
bool tb_port_width_supported(struct tb_port *port, unsigned int width);