communication with a processor imx7

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If you're just testing the GPIO, the easiest way is toggle a GPIO on the i.MX7, and directly wire that output in the FPGA to an LED (pass through). If you want to just confirm the signal is reaching the FPGA, you can use a clock, register the input, and look at it using SignalTap, the Altera built-in logic analyzer tool.

I'd recommend using SPI, as it is a faster protocol, and really worth understanding if doing firmware development. Now, if you're using SPI things get a bit more complicated. You probably want to start by experimenting with an n-bit SPI word from the i.MX, and decode the message in the FPGA. SPI works that whenever the chip select goes low, data is clocked in to the slave device using the SPI clock at some rate. Once chip select goes high, the data is valid, and the FPGA can then process the received message.

Or just tie the chip select from the i.MX to an FPGA output, and probe the signals.

Lots of options!

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Could you give me more detail about this? Because I'm a new user.

What should I do exactly in quartus to do the connection with processor