[linux-sunxi] Re: [PATCH 2/8] ARM: sun4i: Add display blocks for the sun4i dtsi.

[Philippe Fouquet]

Hi

If you want I work with a Allwinner A20 (my board are derived from 
OlinuXino-Micro-A20), and I will interest with LVDS function.

I use your patch but I have nothing to display on my screen.
You can see my work on 
https://github.com/Philippe12/linux-sunxi/tree/sun7i-A20-lvds
My hardware is good, it word with u-boot and a older kernel 3.4.104

I use a dlc screen (dlc0700DDG-T-11) my fault is probably on simple-panel 
information but I didn't seen were

If you can tell me some things to check.

Thank for your help
Best regards
Philippe FOUQUET


Le lundi 13 février 2017 17:46:48 UTC+1, Priit Laes a écrit :
>
> On Mon, 2017-02-13 at 17:20 +0800, Chen-Yu Tsai wrote: 
> > On Mon, Feb 13, 2017 at 5:16 PM, Maxime Ripard 
> > <maxime... at free-electrons.com <javascript:>> wrote: 
> > > Hi, 
> > > 
> > > On Sat, Feb 11, 2017 at 07:43:59PM +0200, Priit Laes wrote: 
> > > > Added basic display pipeline consisting of tcon, display backend 
> > > > and 
> > > > frontend blocks. 
> > > > 
> > > > Signed-off-by: Priit Laes <pl... at plaes.org <javascript:>> 
> > > > --- 
> > > >  arch/arm/boot/dts/sun4i-a10.dtsi | 104 
> > > > +++++++++++++++++++++++++++++++++++++++ 
> > > >  1 file changed, 104 insertions(+) 
> > > > 
> > > > diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi 
> > > > b/arch/arm/boot/dts/sun4i-a10.dtsi 
> > > > index ba20b48..70991c9 100644 
> > > > --- a/arch/arm/boot/dts/sun4i-a10.dtsi 
> > > > +++ b/arch/arm/boot/dts/sun4i-a10.dtsi 
> > > > @@ -779,6 +779,45 @@ 
> > > >                       #size-cells = <0>; 
> > > >               }; 
> > > > 
> > > > +             tcon0: lcd-controller at 1c0c000 { 
> > > > +                     compatible = "allwinner,sun5i-a13-tcon"; 
> > > 
> > > There's a few bits here and there that need to be setup differently 
> > > in 
> > > A10, so you cannot reuse that compatible (same thing for the 
> > > other). 
> > > 
> > > Also, I'd really like to have all the blocks listed here, and not 
> > > only 
> > > the first pipeline. Ideally, on the A10, the two pipelines should 
> > > be 
> > > enabled too. 
> > 
> > The display pipeline driver has to be fixed before that can happen 
> > though. And I haven't started to work on what I proposed yet. Though 
> > if someone wants to take over I can forward any design plans I have. 
>
> Well, my plan was to get at least minimum bits mainlined and then build 
> additional features on top. 
>
> Wens, it would be cool though, if you could share your plans. 
>
> Unfortunately I have only single A10 device (with LVDS and mini-HDMI) 
> but I don't actually have other LVDS-displays I could easily use with 
> A20 devices (I have CubieTruck and A20-Olinuxino Micro). 
>
> Päikest, 
> Priit :) 
>
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