From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Dietrich Subject: Re: [PATCH 2/2] ARM: tegra: paz00: Add LVDS support to device tree Date: Fri, 27 Dec 2013 00:18:30 +0100 Message-ID: <4478357.8zXrzzag7Z@ax5200p> References: <1519363.agF5fhqzYs@ax5200p> <12640298.egJ6YnqTYx@ax5200p> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <12640298.egJ6YnqTYx@ax5200p> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stephen Warren Cc: Thierry Reding , linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: linux-tegra@vger.kernel.org On Thursday 26 December 2013 14:52:10 Marc Dietrich wrote: > On Saturday 21 December 2013 23:11:58 Marc Dietrich wrote: > > Sorry, Stephen, I mistyped your email address in the first post. > > > > On Saturday 21 December 2013 21:38:13 Marc Dietrich wrote: > > > Add backlight and panel nodes for the PAZ00 TFT LCD panel. > > > > > > Signed-off-by: Marc Dietrich > > > --- > > > This should enable everything needed. Unfortunately, in my tests it only > > > switches on the backlight, but the display controller blocks in some > > > infinit loop, so we get no output (and no working system). I post it > > > here > > > in case I missed something obvious... > > Some users reported that it works when using uboot (yeah, shame on me that I > still use fastboot on my dev machine), so I did a bit more research. It > indeed works when using uboot, even when the display setup is disabled > there. So my guess is that maybe some clock isn't setup by fastboot which > is done by uboot. ok, to bring this self-conversation to an end, the cpu blocks at a memory barrier right after value = tegra_dc_readl(rgb->dc, DC_CMD_DISPLAY_COMMAND); in tegra_output_rgb_disable (rgb.c).