[Gta04-owner] Linux 3.2-rc2 on GTA04

[NeilBrown]

On Tue, 22 Nov 2011 16:18:45 +0100 Johannes Schauer <j.schauer at email.de>
wrote:

> Hi,
> 
> On Mon, Nov 21, 2011 at 10:32:41PM +1100, NeilBrown wrote:
> > Hi, I decided that the only kernel that I really wanted to run on my
> > Phoenux is current mainline (plus necessary patches of course).
> 
> ACK
> 
> > You can see my current code at
> >    git://neil.brown.name/gta04
> > The 'merge' branch is a merge of several other branches, currently
> >  gta04 i2c bq27000 twl4030-irq power
> > some of which are tidier than others.
> > Also visible at
> >    http://neil.brown.name/git/gta04
> > but remember to select the "head" that you want.
> > 
> > You can get my config with
> >    make gta04a3_defconfig
> 
> what toolchain are you using? I'm using gcc-4.4-arm-linux-gnueabi
> emdebian toolchain and got an ICE when trying to "make modules" on the
> "merge" branch. It seems to be this error:
> https://bugs.launchpad.net/gcc-linaro/+bug/623945 but turning off
> CONFIG_DEBUG_INFO_REDUCED was a workaround that made the whole thing
> cross-compile (in case someone else is running into it).

I'm using

  http://www.angstrom-distribution.org/toolchains/angstrom-2011.03-x86_64-linux-armv7a-linux-gnueabi-toolchain.tar.bz2

with
    export PATH=$PATH:/usr/local/angstrom/arm/bin 
    export CROSS_COMPILE=/usr/local/angstrom/arm/bin/arm-angstrom-linux-gnueabi-


> 
> > This is largely based on David's 3.1 based kernel.  I haven't added
> > anything not in there - just fixed things and removed cruft.  e.g. I'm
> > using the mainline twl4030_charger rather than the older
> > twl4030_bci_charger.
> 
> It boots and loads my rootfs just fine but the display is remaining dark.
> 
> But my dm and Xorg and e17 are starting properly, the processes are
> running and I can't see any errors in the logs.
> 
> When using a strong flashlight I can see the display content so I guess
> it's a problem with the backlight?
> 
> Before X is starting the boot logo (the penguin) show up properly.
> 
> The backlight was working properly with david's 3.1 kernel - is it
> working for you?

I don't even have a display plugged in - just the bare board with a paperclip
to hold the battery in place, and the serial and USB cables plugged in.

As far as I can see, the backlight control code I have is exactly what is in
the 3.1 'master' branch of the goldelico git tree.

It contains:

	gpio_set_value(57, 0); //shutdown backlight first

in gta04_init() in arch/arm/mach-omap2/board-omap3gta04.c

The hw-validation kernel doesn't have that line.  You could try removing it
and see what happens.
It was added by commit 8d109e588b840c288ea1ad4d8f166080510be55a with minimal
explanation.

NeilBrown


> 
> In the log I see messages like:
> 
> [  391.415924] td028ttec1_panel_suspend()
> [  391.437957] gta04_disable_lcd()
> [  395.173248] td028ttec1_panel_resume()
> 
> But it remains black.
> 
> Thanks for your efforts!
> 
> cheers, josch
> _______________________________________________
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> Gta04-owner at goldelico.com
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