Gps not working with imx6dq apalis board

Dear All,
I am facing one issue with my apalis imx6 board, connected with gps(blox) on uart4(ttymxc3) but could not able to read data on uart.

below post saying this is DMA TX issue with kerne 4.9.88
Linux iMX6 UART Driver Issues, //

nothing is coming on uart
root#cat > /dev/ttymxc0 with 9600 or 115200 baud rate
Configured below serial driver…

using kernel kernel 4.9.87-640138-g18741

what can we the issue ?
Thank you.

HI @shilesh

Could you provide the version of the hardware (including carrier board) and software of your module?

Did you check with an oscilloscope if there is communication on the port UART4?

Best regards,