Re: [PATCH] drm/sun4i: fix HSYNC and VSYNC polarity

[Giulio Benetti]

Hi Jonathan,

Il 13/12/2018 03:55, Jonathan Liu ha scritto:
> > Can you precisely point me the sources of:
> > - u-boot
> > - kernel
> > - dts
> >
> > you're using?
> >
> > Thanks
>
> U-Boot - git tag v2017.03
> Linux - git tag v4.19.6
> DTS - see device tree changes in
> https://github.com/net147/linux/tree/sun7i-drm-wip but change the
> compatible to "innolux,at070tn92"

With Linux v4.19.6 "innolux,at070tn92" doesn't even work and I suspect 
it is because of clock frequency tolerance check for pll setting, so it 
gets discarded from drm resulting in not having a crtc.

Anyway I've just re-checked the signals using another display:
"innolux,at043tn24" that has a more rounded clock frequency, so it's 
accepted by drm and **signals are correct**.
Unfortunately I don't have your same display here to test, so I can't 
help you about that precise panel.

Sorry.
Best regards
--
Giulio Benetti
CTO

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