On Fri, Jul 27, 2018 at 11:13:31AM -0600, Rob Herring wrote: > I don't follow why we need a property rather than being implied by the > device's (the GPU) compatible string. There might be devices where either setup works, with or without IOMMU translation, and the firmware can set the property depending on whether the user wants more performance or more security. If we have a whitelist in the kernel this gets more complicated, we probably need additional kernel-parameters to overwrite those whitelist entries. Having a property in the device-tree seems to be a better way here, imho. Joerg -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html