From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Deucher Subject: Re: [PATCH] drm/radeon: add new AMD ACPI header and update relevant code Date: Thu, 26 Jul 2012 15:42:26 -0400 Message-ID: References: <1343237889-5220-1-git-send-email-alexdeucher@gmail.com> <20120726125838.GA28853@growl> <20120726193346.GA11288@growl> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20120726193346.GA11288@growl> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: Luca Tettamanti Cc: Alex Deucher , linux-acpi@vger.kernel.org, Zhang Rui , dri-devel@lists.freedesktop.org List-Id: linux-acpi@vger.kernel.org On Thu, Jul 26, 2012 at 3:33 PM, Luca Tettamanti 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 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 :) Thanks, Alex