Need HDCP-recognizing Bootcamp Windows driver for MacBook Pro's screen

I need a Bootcamp Windows driver for my MacBook Pro 15/Retina (MBR) that recognizes that the MBR's built-in screen in HDCP-compliant. The current Bootcamp drivers for Windows do recognized HDCP on an external HDMI-connected display, but do not recognized HDCP on the internal display.

BTW, I've read some statements that Windows drivers don't recognize HDCP via DisplayPort connections, so I wonder if Apple is using internal wiring that acts like it's a DisplayPort connection?

Please do not suggest things that only enable disabling DRM HDCP protection from Blu-Ray discs. I need a solution that to cooperate with DRM HDCP protection for content from live tuners, not from a Blu-Ray or DVD disc.

My application is using Windows Media Center (WMC) to play streaming content from my Silicon Dust HD HomeRun Prime (HDHR3) cable TV tuner on my MBR's built-in screen. This works fine with an external HDMI-connected (HDCP-capable) display, but I also want to get this working on my laptop's screen for when I'm stuck in bed (illness, bad back, etc.). The only application Silicon Dust offers for viewing HDHR3 tuner output on Windows (or any platform, as far as I know) which supports all protected cable channels is WMC, and WMC relies on the Apple-provided Windows NVIDIA drivers for HDCP capability. The NVIDIA Control Panel explicitly recognizes my external HDMI-connected monitor's HDCP capability, but does not recognize the MBR's internal screen has having any HDCP. This causes WMC to prevent the display of any TV channels at all from the HDHR3 when the only screen is the internal one (and it blocks DRM-protected channels if both screens are active in parallel).

I'm thinking that the best solution would be an NVIDIA driver for the built-in GeForce GT 650M for Windows 8 (or 7) which recognizes HDCP capability via DisplayPort. Is there anything like that? Or, alternately, some add-in driver that adds a layer of HDCP capability recognition to the standard drivers?

Is there any currently-available solution? . . . something that will enable the internal screen to play all the tuner's cable channels including DRM-protected ones (either on Bootcamp'ed Windows or on the OS X side)?

P.S. -- FYI, the only other potential app I've read about for using an external tuner with a MacBook is an OS X version of MythTV, but (a) that requires an excessively long list of geek tweek steps (install an SQL application, create an SQL database, do lots of command-line tweaks, add & configure a backend app and then a frontend app, ... ) and (b) even then it seems it doesn't support channels that aren't marked "copy-freely", i.e., HDCP-enabled DRM protected content.