MT7688 spi bus drive data shift problem

MTK's SPI BUS driver spi-mt7621.c has a problem.
After CS>0, full-duplex is used, but there is a problem with the full-duplex driver.
When CS=0, connect the onboard SPI-FLASH and use half-duplex, no problem.

 

static int mt7621_spi_transfer_one_message(struct spi_master *master,                        struct spi_message *m) {     struct spi_device *spi = m->spi;     int cs = spi->chip_select;       if (cs)         return mt7621_spi_transfer_full_duplex(master, m);     return mt7621_spi_transfer_half_duplex(master, m); }