[U-Boot] [PATCH] sunxi: use 6MHz PLL_VIDEO step for DE2 for higher resolution LCD

[Vasily Khoruzhick]

On Tue, Nov 13, 2018 at 8:32 AM Jagan Teki <jagan at amarulasolutions.com> wrote:
>
> On Mon, Oct 29, 2018 at 2:08 PM Maxime Ripard <maxime.ripard at bootlin.com> wrote:
> >
> > On Sun, Oct 28, 2018 at 02:26:12PM -0700, Vasily Khoruzhick wrote:
> > > From: Icenowy Zheng <icenowy at aosc.io>
> > >
> > > DE2 SoCs can support LCDs up to 1080p (e.g. A64), and 3MHz step won't
> > > let PLL_VIDEO be high enough for them.
> > >
> > > Use 6MHz step for PLL_VIDEO when using DE2, to satisfy 1080p LCD.
> > >
> > > Signed-off-by: Icenowy Zheng <icenowy at aosc.io>
> > > Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
> > > Tested-by: Vasily Khoruzhick <anarsoul at gmail.com>
> >
> > I wonder if this will cause any issues with panels and lower
> > resolutions that will have a smaller tolerancy.
>
> Does it impact lower resolution panels? is it tested?

It works fine with 1366x768 panel, and I don't have any other panels
that work in u-boot to test. And correct me if I'm wrong but I don't
think that we have any boards with DE2 and low-res panel supported in
u-boot.