From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Zhang Subject: Re: Tegra DRM on AC100 Date: Thu, 25 Oct 2012 15:35:39 +0800 Message-ID: <5088EBCB.7030600@nvidia.com> References: <1351108489.16610.8.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1351108489.16610.8.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thomas Meyer Cc: "linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-tegra@vger.kernel.org Hi, Thomas: Your "config-arm" says the drm driver was built as a kernel module. So did you try to run "modprobe tegra-drm" after system booted? Or, I suggest you can change the drm driver to be built into kernel while not be built as a module. In Thierry's kernel config, drm driver is built as a module, this is good for debugging but may not be convenient for users. In addition, are you sure you have enabled the backlight? Mark On 10/25/2012 03:54 AM, Thomas Meyer wrote: > Hi, > > I'm trying to run Thierry's latest linux kernel > (git://gitorious.org/thierryreding/linux.git branch: tegra/next commit: > 1633170) which contains the Tegra DRM driver on my AC100, but without > success. > > I did these steps: > 1.) Patch kernel with attached patches. One patch is to support the > native AC100 partition scheme, the other one is for the device tree. > > 2.) Compile the kernel with the attached boot config. > 3.) attach the compiled device-tree file to the zImage via "cat zImage > tegra20-paz00 > zImage". > 4.) Use abootimg to create an android boot loader file > > After a reboot all I get is a blank screen, no messages, no errors, > nothing. Sadly this device has no serial port, so any help is > appreciated! > > What am I missing/doing wrong? > > with kind regards > thomas > > >