Unable to connect Matrix to raspberry

Hello,

I have troubles to get my Matrix work with Raspberry Pi Zero W (5,1V 2,5A power supply). I have tried packages reinstall/updgrades also did the hardware test. I am asking for help with investigating, there seem to be a hardware problem. I have checked pins on Raspberry with multimeter and they are fine.

$ sudo /usr/share/matrixlabs/matrixio-devices/matrix-init.bash
    MATRIX device has not been detected
    **** Could not program FPGA
    MATRIX device has not been detected

$ sudo /usr/share/matrixlabs/matrixio-devices/fpga-program.bash 
MATRIX device has not been detected
**** Could not program FPGA

$ sudo /usr/share/matrixlabs/matrixio-devices/fpga_info 
INFO: [/dev/spidev0.0] was opened
MATRIX device has not been detected
FPGA IDENTIFY = 0
FPGA VERSION = 10c4c

$ sudo cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-53, parent: platform/20200000.gpio, pinctrl-bcm2835:
 gpio-18  (                    |sysfs               ) out hi    
 gpio-26  (                    |sysfs               ) out hi    
 gpio-47  (                    |led0                ) out lo

Which kernel do you use on your raspi ? The 5.10.x seams Not supported so far, if you downgrade the kernel it works.

Here is the workaround: