LVDS Display brightness control imx6q apalis

I am trying to control the LVDS display brightness in imx6q apalis, In user space i am able to see the brightness values change but on display its not changing the brightness control, below is the driver code and dtsi file for brightness control, Can any one help to resolve this issue little bit urgent task, one can look for this link is same Re: Brightness Control in iMX6q - NXP Community

Best Regards

What exactly LVDS display do you have? Do you have a display connection diagram if it’s not a Toradex 10" LVDS display?