[U-Boot] [PATCH 1/2 v2] Exynos5800: The Peach-Pi board does not have a Parade video bridge

[Sjoerd Simons]

On Mon, 2014-12-01 at 13:09 -0700, Simon Glass wrote:
> +Akshay
> 
> Hi Sjoerd,
> 
> On 1 December 2014 at 03:03, Sjoerd Simons
> <sjoerd.simons at collabora.co.uk> wrote:
> > Hey Simon,
> >
> > On Sun, 2014-11-30 at 11:56 -0700, Simon Glass wrote:
> >> On 27 November 2014 at 08:08, Sjoerd Simons
> >> <sjoerd.simons at collabora.co.uk> wrote:
> >> > Unlike the Peach-Pit board, there is no parade edp to lvds bridge on the
> >> > Pi. So drop it from  device-tree
> >> >
> >> > Signed-off-by: Sjoerd Simons <sjoerd.simons at collabora.co.uk>
> >> > ---
> >> >  Changes since v1: Only modify the DTB
> >> >
> >> >  arch/arm/dts/exynos5800-peach-pi.dts | 5 -----
> >> >  1 file changed, 5 deletions(-)
> >>
> >> Acked-by: Simon Glass <sjg at chromium.org>
> >>
> >> Tested on snow, pit, pi (display does not yet work on Pi).
> >
> > Just to be clear, in your testing does the display not work on Pi? It
> > seems to be ok here (with u-boot starting chainloaded from one of the
> > KERN partitions)
> 
> That's right, not in U-Boot. I think this is because some GPIOs need
> to be enabled to turn on the backlight etc. Maybe you have an EC which
> turns these on automatically?
> 
> If current mainline is supposed to make the display work on Pi then I
> need to do some debugging. Please let me know.

It does work on my machine, so i was wondering if it's a setup
difference. I'm using the chained u-boot method (iotw the standard
chromeos u-boot in flash starts main-line u-boot from mmc/SD), which
might well mean that the GPIOs you're referring to are still turned on
by the first u-boot (which it has to do to show me the unverified boot
warning screen)?

-- 
Sjoerd Simons <sjoerd.simons at collabora.co.uk>
Collabora Ltd.
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