A:Answer Actually it could also be a hardware implementation of HDR over DP port. I read somewhere in one of the sites.
Well it is true that HDR extensions were specified in version 1.4 of the DisplayPort standard, but as far as what devices support, it depends on what you mean by "DP 1.2" since version numbers apply to the DisplayPort Standard (a PDF document) not to actual hardware. There is no technical meaning to "this device supports DisplayPort 1.2", it's just a casual shorthand people use. Usually what people (and manufacturers) mean when they say "DP 1.2 port" is just that it supports up to HBR2 speed. It may or may not also support the HDR extensions as defined in version 1.4 of the DP standard, depending on how new the controller is. But even if it does, some manufacturers will still label this as a "DP 1.2" port, because it is normally used to just indicate the maximum speed of the port. So there are monitors with "DP 1.2" ports that support HDR (i.e. LG 32UD99).
Basically from a technical perspective, the question "do DP 1.2 monitors support HDR" has no answer since there is no technical definition of what a "DP 1.2 monitor" is. The only real question one can ask is "do monitors that are labeled as 'DP 1.2' by the manufacturer support HDR?" the answer is "yes, it's possible".
