Cyclone V HPS UART, can't rx data

Hi,

I am encountering the same issue. I've tried to do the following "declaring '1' on input pins CTS, DSR, DCD, RI"

hps_ips_hps_0# (

.F2S_Width (2),

.S2F_Width (2)

) hps_0 (

.h2f_mpu_eventi (), // h2f_mpu_events.eventi

.h2f_mpu_evento (), // .evento

.h2f_mpu_standbywfe (), // .standbywfe

.h2f_mpu_standbywfi (), // .standbywfi

.uart1_cts (1'b1), // uart1.cts

.uart1_dsr (1'b1), // .dsr

.uart1_dcd (1'b1), // .dcd

.uart1_ri (1'b1), // .ri

.uart1_dtr (hps_0_uart1_dtr), // .dtr

.uart1_rts (hps_0_uart1_rts), // .rts

.uart1_out1_n (hps_0_uart1_out1_n), // .out1_n

.uart1_out2_n (hps_0_uart1_out2_n), // .out2_n

.uart1_rxd (hps_0_uart1_rxd), // .rxd

.uart1_txd (hps_0_uart1_txd), // .txd

But it changes nothing.

I use original u-boot and kernel 4.8. And I am wondering if the following "generating and updating preloader/uboot." maybe matters in this case. If it does what should be changed at u-boot before generation it?

Btw, I got something like this while running minicom on /dev/ttyS1 (with and without pins routing to FPGA enabled)

[ 23.302445] ttyS1 - failed to request DMA

What could go wrong?

Thanks in advance