[PATCH 2/3] acpi_video: Intel video is not always i915

[Alan Cox]

On Tue, 24 Apr 2012 22:02:18 +0100
Matthew Garrett <mjg59 at srcf.ucam.org> wrote:

> On Tue, Apr 24, 2012 at 04:45:01PM +0100, Alan Cox wrote:
> > From: Alan Cox <alan at linux.intel.com>
> > 
> > Handle the GMA500/600/36x0 cases. Also stop it poking at random registers on
> > the i740 cards that may be out there still.
> 
> The PowerVR Intels I'd seen had the opregion address in the 0xfc 
> register as well. Is this no longer true on the latest?

PowerVR does - i740 never did.

The PowerVR 0xfc poking also doesn't currently work once the driver takes
over because it isn't yet implementing the driver end of the weird ACPI
messaging/event stuff.

Once it does the GMA500 will be able to do an ACPI video register, but we
will still need the check to get the ifdeffery right for what drivers are
compiled for the kernel.

Alan