On Thu, Jul 26, 2012 at 03:42:26PM -0400, Alex Deucher wrote: > On Thu, Jul 26, 2012 at 3:33 PM, Luca Tettamanti <kronos.it@xxxxxxxxx> wrote: > > 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@xxxxxxxxx> 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 ;) > > I don't have patches for that. Please feel free to work on it :) I just found the first problem (probably a BIOS bug): ATIF_FUNCTION_GET_SYSTEM_PARAMETERS is implemented in the DSDT, but the corresponding bit ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED is not set :( I intended to use the method to set up the notification handler but now my BIOS says that it's not there even if it is... Can I assume some default values (e.g. notifications are enabled and will use 0x81 unless ATIF_FUNCTION_GET_SYSTEM_PARAMETERS says something different)? thanks, Luca _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
