Re: drm/exynos: Add atomic modesetting support

[Gustavo Padovan <gustavo@padovan.org>]

2015-05-10 Inki Dae <inki.dae@samsung.com>:

> 2015-05-09 21:13 GMT+09:00 Tobias Jakobi <liquid.acid@gmx.net>:
> > Hello Inki,
> >
> >
> > Inki Dae wrote:
> >> Hi,
> >>
> >> 2015-05-09 6:51 GMT+09:00 Tobias Jakobi <liquid.acid@gmx.net>:
> >>> Hello,
> >>>
> >>> I've tested this on my Hardkernel Odroid-X2 (connected via HDMI to a
> >>> 1080p panel).
> >>>
> >>> Run the usual modetest tests (just primary plane, primary plane with
> >>> vsync, primary plane with overlay, primary plane with overlay and video
> >>> overlay, overlay partially outside of crtc area, etc.) and haven't
> >>> noticed any issues so far.
> >>
> >> As I mentioned several times, it works well in case that only one crtc
> >> driver is enabled. Could you check it again after you enable two or
> >> more crtc drivers such as FIMD and HDMI or FIMD, HDMI and VIDI
> >> together? For this, dts file for X2 should contain their device nodes
> >> and also should be configurated though menuconfig.
> > I've enabled VIDI and FIMD and confirmed that they should up properly in
> > modetest before applying the series.
> >
> > Booting with the atomic series works fine, but I get a segfault when
> > calling modetest. I've attached the kernel log below.
> 
> Below panic issue is same as one I faced with at previous patch seris,
> v3, which was invalid memory access - state->crtc is NULL whille
> modetest is being performed. It seems that the last patch of v4 didn't
> resolve this issue yet.

The weird thing is that it works quite fine on my exynos 5 hardware.
I'll take a look on what could be be happening to cause this kind of
crash.

	Gustavo