MBOX_RX 405 drivers/remoteproc/st_remoteproc.c ddata->mbox_chan[ST_RPROC_VQ0 * MBOX_MAX + MBOX_RX] = chan; MBOX_RX 421 drivers/remoteproc/st_remoteproc.c ddata->mbox_chan[ST_RPROC_VQ1 * MBOX_MAX + MBOX_RX] = chan;