REG_DP_MAINLINK_READY
ret = readx_poll_timeout(readl, ctrl->link_base + REG_DP_MAINLINK_READY,
pattern_sent = msm_dp_read_link(ctrl, REG_DP_MAINLINK_READY);
ret = readl_poll_timeout(ctrl->link_base + REG_DP_MAINLINK_READY,