ArriaV SoC spim0 does not work, when SPI read

Hi! All

I use ArriaV SoC Board(dk-dev-5astd5nes)

spim0 on hps is used for external device.but, I fail to SPI read.

I confirm as below,

*external deviece output readback data.

*readback data is arrived at spim_rxd of FPGA Routing.

*when I read "dr" register,the value is 0xFF.

*at "spi_en" in "SPIENR"=disable,I can not write "rx_sample_delay" to 0xA via EDS or my driver.

someone works spim0 on ArriaV SoC(5ASTFD5K3F40I3NES) ?

BR, Taira