Hi Laurent,

On Sat, Feb 27, 2016 at 2:53 AM, Laurent Pinchart
[off-list ref] wrote:

After rebasing this series on top of Simon's latest devel branch, I'm
experiencing hard system freezes when using the VSP.

Is this due to the rebasing? Did it work in renesas-drivers-2016-02-16-v4.5-rc4
or renesas-drivers-2016-02-23-v4.5-rc5?

What makes the problem curious is that PM runtime works fine when the VSP
instances are probed, the A3VP power domain is turned on and off correctly for
each instance. However, after booting the system, if I try to RPM resume the
device, the system hangs.

I've traced this (using printk debugging) down to the SYSCISCR write in
rcar_sysc_power(). The value written is 0x00000200, which corresponds to the
A3VP power domain, and the resume request completion wait loop doesn't time
out.

So the second write to SYSCISCR in that function locks up the system?

Does this ring any bell ? Do you have a more recent version of this patch
series that I could try ?

No clue, and no more recent version available yet.

What do I need to reproduce this?

Thanks for testing!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds