[U-Boot] [PATCH v4 0/16] tegra: Add display driver and LCD support for Seaboard

[Tom Warren]

Simon/Stephen,

> -----Original Message-----
> From: sjg at google.com [mailto:sjg at google.com] On Behalf Of Simon Glass
> Sent: Monday, October 08, 2012 1:06 PM
> To: Stephen Warren
> Cc: U-Boot Mailing List; Tom Warren
> Subject: Re: [PATCH v4 0/16] tegra: Add display driver and LCD support for
> Seaboard
> 
> Hi Stephen,
> 
> On Fri, Oct 5, 2012 at 12:51 PM, Stephen Warren <swarren at wwwdotorg.org>
> wrote:
> > On 10/03/2012 11:05 AM, Stephen Warren wrote:
> >> On 09/27/2012 06:44 PM, Simon Glass wrote:
> >>> This series adds support for the Tegra2x's display peripheral. This
> >>> supports the LCD display on Seaboard and we use this to enable
> >>> console output in U-Boot on the LCD.
> > ...
> >> 2) The display works fine for cold boot, or hitting the physical
> >> reset button, but when I execute "reset" at the U-Boot prompt, or
> "reboot"
> >> within Linux, the display is messed up; it looks like the LCD isn't
> >> able to sync to the timings sent by the display controller or something
> similar.
> >>
> >> Since this is slightly a corner case, it may be OK to fix it later
> >> (but not much later; reboot is very useful to me.)
> >
> > A couple more points:
> >
> > BTW, I tried the same tests on Springbank which is basically Seaboard
> > with a slightly different PCB layout, and didn't see this issue. That
> > leads me to suspect some timing issue interacting with the panel,
> > which I believe is different albeit theoretically compatible
> > resolution/scan-timing wise.
> 
> OK. I wonder the panel does not get reset properly on Seaboard?
> 
> >
> > Second, I first applied Tom's Tegra30 patches and tested those, then
> > applied your LCD series. The LCD series as-is breaks compilation of
> > the
> > Tegra30 support. I have no idea which order Tom might apply these in,
> > but this is a heads-up there will be conflicts and one needs to be
> > rebased on top of the other.
> 
> OK, let's see what Tom wants to do on that one.

I'll have to wait to address this until I get back from HQ (next week, most likely).

Thanks,

Tom
> 
> Regards,
> Simon
-- 
nvpublic