[PATCH] drm/radeon: add new AMD ACPI header and update relevant code

[Luca Tettamanti]

On Thu, Jul 26, 2012 at 11:35:25AM -0400, Alex Deucher wrote:
> On Thu, Jul 26, 2012 at 8:58 AM, Luca Tettamanti <kronos.it at gmail.com> wrote:
> > The other missing bit is how to actually change the brightness... Alex,
> > do you know what registers to poke?
> 
> You need to check if the GPU controls the backlight or the system
> does.  I think the attached patches should point you in the right
> direction.

Yep :)

0050:  ATOM_FIRMWARE_CAPABILITY_ACCESS usFirmwareCapability :
  0050:  (union) ATOM_FIRMWARE_CAPABILITY sbfAccess          :
    USHORT GPUControlsBL:1                              = 0x0001     (1)

The panel is using the INTERNAL_UNIPHY encoder, and I see the
UNIPHYTransmitterControl command table.

Interaction with video.ko is still a bit messy...

Do you already have code for handling the notifications? I'll work on it
in the weekend otherwise ;)

Luca