Hi Niklas,
On Fri, Oct 16, 2020 at 12:46 PM Niklas Söderlund
<niklas.soderlund+renesas@xxxxxxxxxxxx> wrote:
> On 2020-10-16 09:06:20 +0200, Geert Uytterhoeven wrote:
> > On Fri, Oct 16, 2020 at 4:01 AM Niklas Söderlund
> > <niklas.soderlund+renesas@xxxxxxxxxxxx> wrote:
> > > This series add suspend and resume support directly to R-Car VIN and
> > > indirectly to R-Car CSI-2 and other subdevices in the VIN capture
> > > pipeline. The capture pipeline is stopped when suspending and started
> > > when resuming, all while retaining the buffers provided from user-space.
> > > This makes the start and stop of the pipeline transparent from an
> > > application point of view.
> > >
> > > As the pipeline is switched off subdevices that poweroff themself when
> > > not in use (such as R-Car CSI-2) are also switched off and are
> > > indirectly serviced by the suspend support in VIN.
> >
> > Thanks for your series!
> >
> > > This work is based on-top of the media-tree and is tested on both R-Car
> > > Gen2 and Gen3 without any regressions.
> >
> > FTR: did you test on Gen3 with both s2idle and s2ram, the latter powering
> > off the SoC?
>
> I have only been able to test it with s2idle. My issue is that s2ram
> fails to reconnect the Ethernet (ravb) and I use nfsroot. If I instead
> use a initramfs I can resume from s2ram but I don't have the setup to
> test capture in that environment.
> [ 347.775223] libphy: ravb_mii: probed
> [ 347.782808] mdio_bus e6800000.ethernet-ffffffff: MDIO device at address 0 is missing.
> [ 347.794508] ravb e6800000.ethernet eth0: failed to connect PHY
> [ 347.802223] PM: dpm_run_callback(): ravb_resume+0x0/0x190 returns -2
> [ 347.808739] PM: Device e6800000.ethernet failed to resume: error -2
> [ 347.929701] ata1: link resume succeeded after 1 retries
> [ 347.989934] OOM killer enabled.
> [ 347.993184] Restarting tasks ... done.
> [ 348.004321] PM: suspend exit
> [ 348.039400] ata1: SATA link down (SStatus 0 SControl 300)
> [ 529.376515] nfs: server 10.0.1.1 not responding, still trying
> [ 529.376702] nfs: server 10.0.1.1 not responding, still trying
> [ 529.385628] nfs: server 10.0.1.1 not responding, still trying
> ** Board never reaches user-space **
>
> Is there a known fix for this?
Please try cherry-picking commit 77972b55fb9d35d4 ("Revert "ravb: Fixed
to be able to unload modules"") from v5.9.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
