adv748x_get_remote_sd
tx = adv748x_get_remote_sd(&afe->pads[ADV748X_AFE_SOURCE]);
src = adv748x_get_remote_sd(&tx->pads[ADV748X_CSI2_SINK]);
tx = adv748x_get_remote_sd(&hdmi->pads[ADV748X_HDMI_SOURCE]);