Hi Geert,
On 2020-10-16 09:06:20 +0200, Geert Uytterhoeven wrote:
> Hi Niklas,
>
> 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.
My procedure for s2idle that works with nfsroot is,
# path=$(find /sys -path '/sys/devices/platform/*/ttySC0/power/wakeup')
# echo enabled > $path
# echo N > /sys/module/printk/parameters/console_suspend
# echo s2idle > /sys/power/mem_slee
# echo mem > /sys/power/state
** Wait a while and then wakeup using the console **
#
My procedure for s2ram that does _not_ work with nfsroot (but do with
initramfs). Both tests are done on a M3-N.
# echo N > /sys/module/printk/parameters/console_suspend
# echo on > /sys/bus/i2c/drivers/bd9571mwv/*/bd9571mwv-regulator*/backup_mode
** flipp SW23 off **
# echo mem > /sys/power/state
[ 347.096336] PM: suspend entry (deep)
[ 347.104251] Filesystems sync: 0.003 seconds
[ 347.123751] Freezing user space processes ... (elapsed 0.007 seconds) done.
[ 347.138760] OOM killer disabled.
[ 347.142099] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
[ 347.167466] ravb e6800000.ethernet eth0: Link is Down
[ 347.440549] Disabling non-boot CPUs ...
[ 347.448805] CPU1: shutdown
[ 347.451731] psci: CPU1 killed (polled 0 ms)
** Waits 30+ seconds then switch SW23 on **
INFO: ARM GICv2 driver initialized
NOTICE: BL2: R-Car Gen3 Initial Program Loader(CA57) Rev.2.0.6
NOTICE: BL2: PRR is R-Car M3N Ver.1.0
NOTICE: BL2: Board is Salvator-XS Rev.1.0
NOTICE: BL2: Boot device is HyperFlash(160MHz)
NOTICE: BL2: LCM state is CM
NOTICE: AVS setting succeeded. DVFS_SetVID=0x53
NOTICE: BL2: DDR3200(rev.0.40)
NOTICE: BL2: [WARM_BOOT]
NOTICE: BL2: DRAM Split is OFF
NOTICE: BL2: QoS is default setting(rev.0.09)
NOTICE: BL2: DRAM refresh interval 1.95 usec
NOTICE: BL2: Periodic Write DQ Training
NOTICE: BL2: CH0: 400000000 - 47fffffff, 2 GiB
NOTICE: BL2: FDT at 0xe6322508
NOTICE: BL2: v2.3(release):v2.3-188-g9935047b2086faa3
NOTICE: BL2: Built : 23:31:02, Jun 18 2020
NOTICE: BL2: Normal boot
INFO: BL2: Doing platform setup
[ 347.461237] Enabling non-boot CPUs ...
[ 347.465551] Detected PIPT I-cache on CPU1
[ 347.465611] CPU1: Booted secondary processor 0x0000000001 [0x411fd073]
[ 347.468691] CPU1 is up
[ 347.607806] usb usb2: root hub lost power or was reset
[ 347.613594] usb usb1: root hub lost power or was reset
[ 347.767713] usb usb4: root hub lost power or was reset
[ 347.773424] usb usb3: root hub lost power or was reset
[ 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?
>
> 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
--
Regards,
Niklas Söderlund
