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Message-ID: <CAJiuCccnRCqez2uG-pU8XY4Z=5S8rDwFB3rgsBovPHY1Uxyazw@mail.gmail.com>
Date: Mon, 27 May 2019 20:49:59 +0200
From: Clément Péron <peron.clem@...il.com>
To: Clément Péron <peron.clem@...il.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>,
devicetree <devicetree@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-sunxi <linux-sunxi@...glegroups.com>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-media@...r.kernel.org
Subject: Re: [PATCH v2 00/10] Allwinner A64/H6 IR support
Hi Ondrej,
On Mon, 27 May 2019 at 19:23, Ondřej Jirman <megous@...ous.com> wrote:
>
> Hi Clément,
>
> On Mon, May 27, 2019 at 06:31:17PM +0200, verejna wrote:
> > Hi Clément,
> >
> > On Mon, May 27, 2019 at 04:59:35PM +0200, Clément Péron wrote:
> > > Hi Ondřej,
> > >
> > > On Mon, 27 May 2019 at 15:48, Ondřej Jirman <megous@...ous.com> wrote:
> > > >
> > > > Hi Clément,
> > > >
> > > > On Mon, May 27, 2019 at 12:25:26AM +0200, Clément Péron wrote:
> > > > > Hi,
> > > > >
> > > > > A64 IR support series[1] pointed out that an A31 bindings should be
> > > > > introduced.
> > > > >
> > > > > This series introduce the A31 compatible bindings, then switch it on
> > > > > the already existing board.
> > > > >
> > > > > Finally introduce A64 and H6 support.
> > > >
> > > > Does H6 support actually work? I don't see any driver changes and last time
> > > > I tried with the exact same bindings, I got RCU stalls shortly after boot.
> > >
> > > Actually, I have tested only on H6 on my Beelink GS1 with a "NEC" remote.
> > >
> > > I have manually toggle the protocols and do a simple cat in /dev/input/event0
> > > # echo nec > /sys/class/rc/rc0/protocols
> > > # cat /dev/input/event0 | hexdump
> > > 0000000 0093 0000 0000 0000 8bfb 0009 0000 0000
> > > 0000010 0004 0004 8028 0000 0093 0000 0000 0000
> > > 0000020 8bfb 0009 0000 0000 0000 0000 0000 0000
> > > 0000030 0093 0000 0000 0000 55be 000a 0000 0000
> > > 0000040 0004 0004 8028 0000 0093 0000 0000 0000
> > > 0000050 55be 000a 0000 0000 0000 0000 0000 0000
> > > 0000060 0093 0000 0000 0000 fa42 000d 0000 0000
> > > 0000070 0004 0004 8028 0000 0093 0000 0000 0000
> > > 0000080 fa42 000d 0000 0000 0000 0000 0000 0000
> > > 0000090 0093 0000 0000 0000 c41a 000e 0000 0000
> > > 00000a0 0004 0004 8028 0000 0093 0000 0000 0000
> > > 00000b0 c41a 000e 0000 0000 0000 0000 0000 0000
> > >
> > >
> > > Which kernel did you test with? Do you have any log?
> >
> > I tested with my kernel (https://megous.com/git/linux/log/?h=opi3-5.2). I also
> > tried with 5.1 and the same kernel build on H5, to exclude some early 5.2-rc
> > bugs and to see if this is H6 specific.
> >
> > I'll try testing again with your patches, and get you some logs. But last time
> > they were not very informative.
>
> I'm testing on Orange Pi 3.
>
> With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> responding/serial console stops responding). I don't have RC controller to test
> the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
>
> I tried booting multiple times. Other results:
>
> boot 2:
>
> - ssh hangs even before connecting (ethernet crashes/is reset)
>
> INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu: 0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> rcu: blocking rcu_node structures:
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu: 0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> rcu: blocking rcu_node structures:
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu: 0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
>
> above messages appear regularly.
>
> boot 3:
>
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu: 0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
>
>
> Sometimes serial console keeps working. Sometimes it locks up too (but not
> frequently). Storage locks up always (any program that was not run before
> the crash can't be started and lock up the kernel hard, programs that
> were executed prior, can be run again).
>
>
> Exactly the same kernel build on H5 seems to work (or at least I was not able to
> trigger the crash). So this seems to be limited to H6 for now.
>
> I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> lamp light).
>
> Without your patches, everything works fine on H6, and I never see
> crashes/lockups.
>
> I tired physically covering the IR receiver, and that helps preventing the
> crash. As soon as I uncover it, the crash happens again in 1s or so:
>
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu: 0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu: 0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
>
> This time I got the hung task and reboot: (probably not directly related)
>
> INFO: task find:560 blocked for more than 120 seconds.
> Not tainted 5.2.0-rc2+ #7
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> find D 0 560 551 0x00000000
> Call trace:
> __switch_to+0x6c/0x90
> __schedule+0x1f4/0x578
> schedule+0x28/0xa8
> io_schedule+0x18/0x38
> __lock_page+0x12c/0x208
> pagecache_get_page+0x238/0x2e8
> __get_node_page+0x6c/0x310
> f2fs_get_node_page+0x14/0x20
> f2fs_iget+0x70/0xc60
> f2fs_lookup+0xcc/0x218
> __lookup_slow+0x78/0x160
> lookup_slow+0x3c/0x60
> walk_component+0x1e4/0x2e0
> path_lookupat.isra.13+0x5c/0x1e0
> filename_lookup.part.23+0x6c/0xe8
> user_path_at_empty+0x4c/0x60
> vfs_statx+0x78/0xd8
> __se_sys_newfstatat+0x24/0x48
> __arm64_sys_newfstatat+0x18/0x20
> el0_svc_handler+0x9c/0x170
> el0_svc+0x8/0xc
> Kernel panic - not syncing: hung_task: blocked tasks
> CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> Hardware name: OrangePi 3 (DT)
> Call trace:
> dump_backtrace+0x0/0xf8
> show_stack+0x14/0x20
> dump_stack+0xa8/0xcc
> panic+0x124/0x2dc
> proc_dohung_task_timeout_secs+0x0/0x40
> kthread+0x120/0x128
> ret_from_fork+0x10/0x18
> SMP: stopping secondary CPUs
> Kernel Offset: disabled
> CPU features: 0x0002,20002000
> Memory Limit: none
> Rebooting in 3 seconds..
>
>
> Meanwhile H5 based board now runs for 15 minutes without issues.
>
> So to sum up:
>
> - these crashes are definitely H6 IR related
> - the same kernel, on H5 works
> - covering the sensor prevents the crashes on H6
>
> So we should probably hold on with the series, until this is figured out.
Thanks for testing, but I think it's more hardware related.
It seems that your IR is flooded or misconfigured for your board.
Could you add a simple print in the "sunxi_ir_irq"
If it's confirmed, maybe tweak the threshold configuration or
implement the new active_threshold will help.
With my hardware Beelink GS1 and on Jernej's board (A64) there is no issue.
I will disable all the other H6 boards until someone test it.
Regards,
Clément
>
> I have tried searching for differences between H3 and H6 BSPs. And there are some:
>
> break;
> case IR_IRQ_FIFO_SIZE:
> - irq_reg = sunxi_smc_readl(IR_BASE+IR_RXINTE_REG);
> - irq_reg |= IR_FIFO_32;
> + irq_reg = readl(reg_base + IR_RXINTE_REG);
> + irq_reg |= IR_FIFO_20;
> break;
> }
>
> case IR_CLK_SAMPLE:
> -#ifdef FPGA_SIM_CONFIG
> - sample_reg |= 0x3<<0; /* Fsample = 24MHz/512 = 46875Hz (21.33us) */
> -#else
> - sample_reg |= IR_SAMPLE_128;
> -#endif
> + sample_reg |= IR_SAMPLE_DEV;
> break;
>
> + case IR_BOTH_PULSE_MODE:
> + ctrl_reg = readl(reg_base + IR_CTRL_REG);
> + ctrl_reg |= IR_BOTH_PULSE;
> + break;
> + case IR_LOW_PULSE_MODE:
> + ctrl_reg = readl(reg_base + IR_CTRL_REG);
> + ctrl_reg |= IR_LOW_PULSE;
> + break;
> + case IR_HIGH_PULSE_MODE:
> + ctrl_reg = readl(reg_base + IR_CTRL_REG);
> + ctrl_reg |= IR_HIGH_PULSE;
> + break;
>
>
> 0x0000 CIR_CTL
>
> new bit 8 - CGPO
> General Program Output (GPO) Control in CIR mode for TX Pin
> 0: Low level
> 1: High level
>
> CIR_RXSTA 0x0030
>
> RAC is just 13:8 instead of 14:8
>
>
> I haven't looked deeper, because I have no use for IR on H6. But I hope this
> helps. I can help testing patches if you like.
>
> thank you and regards,
> o.
>
> > regards,
> > o.
> >
> > > Thanks,
> > > Clément
> > >
> > > >
> > > > Enabling/disabling ir node was enough to trigger/stop the RCU stalls on H6.
> > > >
> > > > regards,
> > > > o.
> > > >
> > > > > Regards,
> > > > > Clément
> > > > >
> > > > > [1] https://lore.kernel.org/patchwork/patch/1031390/#1221464
> > > > >
> > > > > Changes since v1:
> > > > > - Document reset lines as required since A31
> > > > > - Explain the memory mapping difference in commit log
> > > > > - Fix misspelling "Allwiner" to "Allwinner"
> > > > >
> > > > > Clément Péron (8):
> > > > > dt-bindings: media: sunxi-ir: add A31 compatible
> > > > > media: rc: sunxi: Add A31 compatible
> > > > > ARM: dts: sunxi: prefer A31 instead of A13 for ir
> > > > > dt-bindings: media: sunxi-ir: Add A64 compatible
> > > > > dt-bindings: media: sunxi-ir: Add H6 compatible
> > > > > arm64: dts: allwinner: h6: Add IR receiver node
> > > > > arm64: dts: allwinner: h6: Enable IR on H6 boards
> > > > > arm64: defconfig: enable IR SUNXI option
> > > > >
> > > > > Igors Makejevs (1):
> > > > > arm64: dts: allwinner: a64: Add IR node
> > > > >
> > > > > Jernej Skrabec (1):
> > > > > arm64: dts: allwinner: a64: Enable IR on Orange Pi Win
> > > > >
> > > > > .../devicetree/bindings/media/sunxi-ir.txt | 11 +++++++++--
> > > > > arch/arm/boot/dts/sun6i-a31.dtsi | 2 +-
> > > > > arch/arm/boot/dts/sun8i-a83t.dtsi | 2 +-
> > > > > arch/arm/boot/dts/sun9i-a80.dtsi | 2 +-
> > > > > arch/arm/boot/dts/sunxi-h3-h5.dtsi | 2 +-
> > > > > .../dts/allwinner/sun50i-a64-orangepi-win.dts | 4 ++++
> > > > > arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
> > > > > .../dts/allwinner/sun50i-h6-beelink-gs1.dts | 4 ++++
> > > > > .../dts/allwinner/sun50i-h6-orangepi.dtsi | 4 ++++
> > > > > .../boot/dts/allwinner/sun50i-h6-pine-h64.dts | 4 ++++
> > > > > arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 19 +++++++++++++++++++
> > > > > arch/arm64/configs/defconfig | 1 +
> > > > > drivers/media/rc/sunxi-cir.c | 1 +
> > > > > 13 files changed, 68 insertions(+), 6 deletions(-)
> > > > >
> > > > > --
> > > > > 2.20.1
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > linux-arm-kernel mailing list
> > > > > linux-arm-kernel@...ts.infradead.org
> > > > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > >
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@...ts.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> >
> > _______________________________________________
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> > linux-arm-kernel@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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