How to change value of clock control register. (DSI_CLKCTRL) in i.MX8 mini

[ManojChate]

Hi team

I need to set D-PHY select to '1' for 1Gbps PHY in imx8 mini. Please share how to perform this change in Linux. If possible, pls share steps on how to access register and registry bin as well.

MIPI-CAMERA #D-PHY#

Thanks

[Manuel_Salas]

Hello @ManojChate 

You can try modifying the driver:

https://github.com/nxp-imx/linux-imx/blob/dfaf2136deb2af2e60b994421281ba42f1c087e0/drivers/video/fbd...

Also, try if possible change with memtool at runtime (it is possible to fail).

Best regards,

Salas.

[ManojChate]

Thank you Salas.
I will try the same way and will update you on this.

[ManojChate]

Hello Salas,

My application requirements meet with LVDS clock running at 66.5MHz with D-PHY being run at 1.5Gbps. So going further to reduce EMI implications which we are facing due to LVDS cabling, we thought of reducing D-PHY to 1Gbps and observe the change in radiations.

Our understanding is that if we reduce D-PHY clock to 1Gbps, the drive strength and slew rate of clock would reduce, and we should observe some improvement in radiations.

Thanks

Manoj

[Manuel_Salas]

Hello @ManojChate 

I hope you are doing very well.

Could you please clarify why you need change the default (1.5Gbps) to the 1Gbps?

Best regards,

Salas.