why did you set pixel-aspect-ratio as 11/10? any reason or you just want to test this? normally we use the command pixel-aspect-ratio=(fraction)1/1 in the command, if you want to change this, you also can add this parameter in the dts file.
I don't know what panel you use which need such aspect ration, but you can refer to the patch as below, how to add the ration you need to the API
"https://lists.freedesktop.org/archives/dri-devel/2017-November/157835.html"