[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Fabio Estevam]

Currently the kernel hangs when USB Host1 is enabled due to the lack of
support for controlling the USB hub clock and GPIO reset line.

Peter Chen has made several attempts to fix this problem, but his series
has not been applied yet, so better disable USB host1 for now to avoid
the kernel hang.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
 arch/arm/boot/dts/imx6qdl-udoo.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
index 4161b7d..1f0b9f6 100644
--- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
@@ -274,7 +274,8 @@
 	pinctrl-0 = <&pinctrl_usbh>;
 	vbus-supply = <&reg_usb_h1_vbus>;
 	clocks = <&clks IMX6QDL_CLK_CKO>;
-	status = "okay";
+	/* currently USB support causes a kernel hang. Disable it for now */
+	status = "disabled";
 };
 
 &usdhc3 {
-- 
2.7.4

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Maciej S. Szmigiero]

On 18.01.2018 13:34, Fabio Estevam wrote:
> Currently the kernel hangs when USB Host1 is enabled due to the lack of
> support for controlling the USB hub clock and GPIO reset line.
> 
> Peter Chen has made several attempts to fix this problem, but his series
> has not been applied yet, so better disable USB host1 for now to avoid
> the kernel hang.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

Hmm, did you get reports or checked that it actually hangs?

As far as I remember last time I ran a kernel without Peter's power
sequence library on this board it only wasn't able to communicate with
the on-board USB hub (and devices behind it), but besides this was
able to boot successfully.
But my memory may be wrong since it was some time ago.

Maciej

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Maciej S. Szmigiero]

Hi Markus,

On 19.01.2018 00:17, Markus Rathgeb wrote:
>     Hmm, did you get reports or checked that it actually hangs?
> 
>     As far as I remember last time I ran a kernel without Peter's power
>     sequence library on this board it only wasn't able to communicate with
>     the on-board USB hub (and devices behind it), but besides this was
>     able to boot successfully.
>     But my memory may be wrong since it was some time ago.
> 
> 
> Hi,
> this has been reported by me.
> 
> Here my initial message and the attachments:
> 
> Hi,
> after updating the linux system on my Udoo Quad it does not boot successful anymore.
> I've been inventing some time to gather information.
> 
> The system has been working "normal" using the kernel 4.12.10.
> With kernel 4.13(.0) it does not work "normal" (problem description follows shortly) anymore.
> The problem still exist in 4.15-rc7.
> 
> So, starting with 4.13 the kernel hangs / system freezes before the root filesystem gets mounted.
> See attached boot-log-4.13.0-freeze.txt
> 
> If I add the parameter "ip=dhcp" to the kernel command line the kernel does not freezes anymore, the root is mounted and the init system is started.
> See attached boot-log-4.13.0-workaround.txt
> 
> The other problem is that starting with 4.13 the system freeze if I load the "rt2800usb" kernel module.
> 
> Please let me know if I could add more information or could do some further tests etc.

Does applying Fabio's patch to the freezing 4.13 or 4.15-rc kernel cause it to boot
successfully?

> Best regards,
> Markus
> 

Best regards,
Maciej

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Markus Rathgeb]

> Does applying Fabio's patch to the freezing 4.13 or 4.15-rc kernel cause it to boot
successfully?


AFAIK The latest series that Peter Chen to address the issue was posted was
v16 from June, 2017.
I didn't try it yet myself.
Will give it a try the next days.

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Maciej S. Szmigiero]

On 19.01.2018 00:50, Markus Rathgeb wrote:
>> Does applying Fabio's patch to the freezing 4.13 or 4.15-rc kernel cause it to boot
> successfully?
> 
> 
> AFAIK The latest series that Peter Chen to address the issue was posted was
> v16 from June, 2017.
> I didn't try it yet myself.
> Will give it a try the next days.

Peter's power sequence library patches do work, I'm using them on
4.15-rc without problems.

However, in my previous question I inquired whether the Fabio's "Disable usbh1 to
avoid kernel hang" patch, that this email thread is about, when applied to the
freezing 4.13 or 4.15-rc kernel, cause it to boot successfully - does it?

Maciej

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Markus Rathgeb]

> Hmm, did you get reports or checked that it actually hangs?
>
> As far as I remember last time I ran a kernel without Peter's power
> sequence library on this board it only wasn't able to communicate with
> the on-board USB hub (and devices behind it), but besides this was
> able to boot successfully.
> But my memory may be wrong since it was some time ago.

Sorry guys, it seems I have problems sending this mail to all the
recipients (at least the linux-arm-kernel list).
Last try!


Hi,
this has been reported by me.

Here my initial message and the attachments:

Hi,
after updating the linux system on my Udoo Quad it does not boot
successful anymore.
I've been inventing some time to gather information.

The system has been working "normal" using the kernel 4.12.10.
With kernel 4.13(.0) it does not work "normal" (problem description
follows shortly) anymore.
The problem still exist in 4.15-rc7.

So, starting with 4.13 the kernel hangs / system freezes before the
root filesystem gets mounted.
See attached boot-log-4.13.0-freeze.txt

If I add the parameter "ip=dhcp" to the kernel command line the kernel
does not freezes anymore, the root is mounted and the init system is
started.
See attached boot-log-4.13.0-workaround.txt

The other problem is that starting with 4.13 the system freeze if I
load the "rt2800usb" kernel module.

Please let me know if I could add more information or could do some
further tests etc.

Best regards,
Markus
-------------- next part --------------
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] random: get_random_bytes called from start_kernel+0x34/0x404 with crng_init=0
[    0.000000] Linux version 4.13.0-1-ARCH (builduser at leming) (gcc version 7.1.1 20170630 (GCC)) #1 SMP Tue Sep 5 02:22:08 UTC 2017
[    0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Udoo i.MX6 Quad Board
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] cma: Reserved 48 MiB at 0x4d000000
[    0.000000] percpu: Embedded 17 pages/cpu @ef693000 s37516 r8192 d23924 u69632
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 260416
[    0.000000] Kernel command line: console=ttymxc1,115200 root=PARTUUID=a8f8549b-01 rw rootwait video=
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Memory: 963520K/1048576K available (11264K kernel code, 1017K rwdata, 4580K rodata, 2048K init, 899K bss, 35904K reserved, 49152K cma-reserved, 212992K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xf0800000 - 0xff800000   ( 240 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xf0000000   ( 768 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc0c00000   (12256 kB)
[    0.000000]       .init : 0xc1100000 - 0xc1300000   (2048 kB)
[    0.000000]       .data : 0xc1300000 - 0xc13fe720   (1018 kB)
[    0.000000]        .bss : 0xc1409234 - 0xc14ea07c   ( 900 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] L2C-310 errata 752271 769419 enabled
[    0.000000] L2C-310 enabling early BRESP for Cortex-A9
[    0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[    0.000000] L2C-310 ID prefetch enabled, offset 16 lines
[    0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000] L2C-310 cache controller enabled, 16 ways, 1024 kB
[    0.000000] L2C-310: CACHE_ID 0x410000c7, AUX_CTRL 0x76470001
[    0.000000] Switching to timer-based delay loop, resolution 333ns
[    0.000007] sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 715827882841ns
[    0.000031] clocksource: mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 637086815595 ns
[    0.002457] Console: colour dummy device 80x30
[    0.002488] Calibrating delay loop (skipped), value calculated using timer frequency.. 6.00 BogoMIPS (lpj=12000)
[    0.002504] pid_max: default: 32768 minimum: 301
[    0.002778] Security Framework initialized
[    0.002964] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.002979] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.003693] CPU: Testing write buffer coherency: ok
[    0.004021] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.004392] Setting up static identity map for 0x10100000 - 0x101000a0
[    0.005968] Hierarchical SRCU implementation.
[    0.007595] smp: Bringing up secondary CPUs ...
[    0.008293] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.009073] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[    0.009834] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[    0.009926] smp: Brought up 1 node, 4 CPUs
[    0.009946] SMP: Total of 4 processors activated (24.00 BogoMIPS).
[    0.009953] CPU: All CPU(s) started in SVC mode.
[    0.010950] devtmpfs: initialized
[    0.020692] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[    0.021009] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.021031] futex hash table entries: 1024 (order: 4, 65536 bytes)
[    0.023802] xor: measuring software checksum speed
[    0.063379]    arm4regs  :  1221.000 MB/sec
[    0.103380]    8regs     :   944.000 MB/sec
[    0.143378]    32regs    :   979.000 MB/sec
[    0.183378]    neon      :   893.000 MB/sec
[    0.183387] xor: using function: arm4regs (1221.000 MB/sec)
[    0.183484] pinctrl core: initialized pinctrl subsystem
[    0.185106] NET: Registered protocol family 16
[    0.187853] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.189872] cpuidle: using governor menu
[    0.190656] CPU identified as i.MX6Q, silicon rev 1.2
[    0.197266] vdd1p1: supplied by regulator-dummy
[    0.197807] vdd3p0: supplied by regulator-dummy
[    0.198275] vdd2p5: supplied by regulator-dummy
[    0.198776] vddarm: supplied by regulator-dummy
[    0.199207] vddpu: supplied by regulator-dummy
[    0.199694] vddsoc: supplied by regulator-dummy
[    0.209279] No ATAGs?
[    0.209423] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
[    0.209436] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.211086] imx6q-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
[    0.212307] Serial: AMBA PL011 UART driver
[    0.291916] raid6: int32x1  gen()   104 MB/s
[    0.359444] raid6: int32x1  xor()   144 MB/s
[    0.427652] raid6: int32x2  gen()   165 MB/s
[    0.495446] raid6: int32x2  xor()   168 MB/s
[    0.563643] raid6: int32x4  gen()   191 MB/s
[    0.631500] raid6: int32x4  xor()   158 MB/s
[    0.699622] raid6: int32x8  gen()   223 MB/s
[    0.767548] raid6: int32x8  xor()   153 MB/s
[    0.835447] raid6: neonx1   gen()   615 MB/s
[    0.903422] raid6: neonx1   xor()   453 MB/s
[    0.971377] raid6: neonx2   gen()   661 MB/s
[    1.039395] raid6: neonx2   xor()   576 MB/s
[    1.107409] raid6: neonx4   gen()   541 MB/s
[    1.175392] raid6: neonx4   xor()   523 MB/s
[    1.243426] raid6: neonx8   gen()   500 MB/s
[    1.311441] raid6: neonx8   xor()   448 MB/s
[    1.311449] raid6: using algorithm neonx2 gen() 661 MB/s
[    1.311455] raid6: .... xor() 576 MB/s, rmw enabled
[    1.311463] raid6: using intx1 recovery algorithm
[    1.324606] mxs-dma 110000.dma-apbh: initialized
[    1.329807] vgaarb: loaded
[    1.330634] SCSI subsystem initialized
[    1.331095] usbcore: registered new interface driver usbfs
[    1.331159] usbcore: registered new interface driver hub
[    1.331261] usbcore: registered new device driver usb
[    1.332480] i2c i2c-1: IMX I2C adapter registered
[    1.332498] i2c i2c-1: can't use DMA, using PIO instead.
[    1.332983] i2c i2c-2: IMX I2C adapter registered
[    1.332999] i2c i2c-2: can't use DMA, using PIO instead.
[    1.333858] media: Linux media interface: v0.10
[    1.333909] Linux video capture interface: v2.00
[    1.333986] pps_core: LinuxPPS API ver. 1 registered
[    1.333995] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    1.334017] PTP clock support registered
[    1.334052] EDAC MC: Ver: 3.0.0
[    1.335076] Advanced Linux Sound Architecture Driver Initialized.
[    1.335619] NetLabel: Initializing
[    1.335629] NetLabel:  domain hash size = 128
[    1.335636] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    1.335700] NetLabel:  unlabeled traffic allowed by default
[    1.336054] clocksource: Switched to clocksource mxc_timer1
[    1.336249] VFS: Disk quotas dquot_6.6.0
[    1.336349] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    1.345822] NET: Registered protocol family 2
[    1.346422] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[    1.346502] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[    1.346631] TCP: Hash tables configured (established 8192 bind 8192)
[    1.346743] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    1.346786] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    1.346997] NET: Registered protocol family 1
[    1.347471] RPC: Registered named UNIX socket transport module.
[    1.347480] RPC: Registered udp transport module.
[    1.347489] RPC: Registered tcp transport module.
[    1.347496] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.347916] Unpacking initramfs...
[    1.714697] Freeing initrd memory: 5008K
[    1.715245] hw perfevents: no interrupt-affinity property for /soc/pmu, guessing.
[    1.715527] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
[    1.718520] workingset: timestamp_bits=14 max_order=18 bucket_order=4
[    1.723650] zbud: loaded
[    1.726110] NFS: Registering the id_resolver key type
[    1.726137] Key type id_resolver registered
[    1.726145] Key type id_legacy registered
[    1.726162] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    1.727740] random: fast init done
[    1.733700] Key type asymmetric registered
[    1.733754] bounce: pool size: 64 pages
[    1.733822] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246)
[    1.733955] io scheduler noop registered
[    1.733965] io scheduler deadline registered
[    1.734280] io scheduler cfq registered (default)
[    1.734291] io scheduler mq-deadline registered
[    1.734300] io scheduler kyber registered
[    1.734552] io scheduler bfq registered
[    1.750159] imx-sdma 20ec000.sdma: Direct firmware load for imx/sdma/sdma-imx6q.bin failed with error -2
[    1.750179] imx-sdma 20ec000.sdma: external firmware not found, using ROM firmware
[    1.755235] imx-pgc-pd imx-pgc-power-domain.0: Linked as a consumer to 20dc000.gpc
[    1.755417] imx-pgc-pd imx-pgc-power-domain.1: Linked as a consumer to 20dc000.gpc
[    1.759290] Serial: 8250/16550 driver, 6 ports, IRQ sharing disabled
[    1.761829] Serial: AMBA driver
[    1.762662] 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 62, base_baud = 5000000) is a IMX
[    2.669811] console [ttymxc1] enabled
[    2.685550] loop: module loaded
[    2.690167] Loading iSCSI transport class v2.0-870.
[    2.695529] iscsi: registered transport (tcp)
[    2.700917] ahci-imx 2200000.sata: fsl,transmit-level-mV not specified, using 00000024
[    2.708873] ahci-imx 2200000.sata: fsl,transmit-boost-mdB not specified, using 00000480
[    2.716910] ahci-imx 2200000.sata: fsl,transmit-atten-16ths not specified, using 00002000
[    2.725111] ahci-imx 2200000.sata: fsl,receive-eq-mdB not specified, using 05000000
[    2.735607] ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled
[    2.742623] ahci-imx 2200000.sata: AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl platform mode
[    2.751438] ahci-imx 2200000.sata: flags: ncq sntf stag pm led clo only pmp pio slum part ccc apst 
[    2.761790] scsi host0: ahci-imx
[    2.765336] ata1: SATA max UDMA/133 mmio [mem 0x02200000-0x02203fff] port 0x100 irq 65
[    2.777481] libphy: Fixed MDIO Bus: probed
[    2.783101] fec 2188000.ethernet: 2188000.ethernet supply phy not found, using dummy regulator
[    2.792208] pps pps0: new PPS source ptp0
[    2.808657] libphy: fec_enet_mii_bus: probed
[    2.813552] fec 2188000.ethernet eth0: registered PHC device 0
[    2.822633] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    2.829196] ehci-pci: EHCI PCI platform driver
[    2.833707] ehci-platform: EHCI generic platform driver
[    2.839185] ehci-mxc: Freescale On-Chip EHCI Host driver
[    2.844648] ehci-omap: OMAP-EHCI Host Controller driver
[    2.850074] ehci-orion: EHCI orion driver
[    2.854281] ehci-exynos: EHCI EXYNOS driver
[    2.858643] tegra-ehci: Tegra EHCI driver
[    2.862853] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    2.869079] ohci-pci: OHCI PCI platform driver
[    2.873595] ohci-platform: OHCI generic platform driver
[    2.879038] ohci-exynos: OHCI EXYNOS driver
[    2.883845] usbcore: registered new interface driver uas
[    2.889240] usbcore: registered new interface driver usb-storage
[    2.895302] usbcore: registered new interface driver ums-cypress
[    2.901361] usbcore: registered new interface driver ums_eneub6250
[    2.907602] usbcore: registered new interface driver ums-freecom
[    2.913662] usbcore: registered new interface driver ums-isd200
[    2.919635] usbcore: registered new interface driver ums-usbat
[    2.932221] ci_hdrc ci_hdrc.0: EHCI Host Controller
[    2.937155] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[    2.960077] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[    2.965680] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    2.972503] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    2.979748] usb usb1: Product: EHCI Host Controller
[    2.984650] usb usb1: Manufacturer: Linux 4.13.0-1-ARCH ehci_hcd
[    2.990672] usb usb1: SerialNumber: ci_hdrc.0
[    2.995638] hub 1-0:1.0: USB hub found
[    2.999469] hub 1-0:1.0: 1 port detected
[    3.007620] snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered 20cc000.snvs:snvs-rtc-lp as rtc0
[    3.017487] i2c /dev entries driver
[    3.029629] sdhci: Secure Digital Host Controller Interface driver
[    3.035837] sdhci: Copyright(c) Pierre Ossman
[    3.041322] Synopsys Designware Multimedia Card Interface Driver
[    3.048211] VUB300 Driver rom wait states = 1C irqpoll timeout = 0400
[    3.048621] usbcore: registered new interface driver vub300
[    3.060733] usbcore: registered new interface driver ushc
[    3.066953] sdhci-pltfm: SDHCI platform and OF driver helper
[    3.073490] sdhci-esdhc-imx 2198000.usdhc: could not get ultra high speed state, work on normal mode
[    3.086564] ata1: SATA link down (SStatus 0 SControl 300)
[    3.092046] ahci-imx 2200000.sata: no device found, disabling link.
[    3.098335] ahci-imx 2200000.sata: pass ahci_imx..hotplug=1 to enable hotplug
[    3.128100] mmc0: SDHCI controller on 2198000.usdhc [2198000.usdhc] using ADMA
[    3.142390] ledtrig-cpu: registered to indicate activity on CPUs
[    3.148695] hidraw: raw HID events driver (C) Jiri Kosina
[    3.154437] usbcore: registered new interface driver usbhid
[    3.160044] usbhid: USB HID core driver
[    3.174814] NET: Registered protocol family 10
[    3.200714] Segment Routing with IPv6
[    3.204441] mmc0: host does not support reading read-only switch, assuming write-enable
[    3.208156] mip6: Mobile IPv6
[    3.208166] NET: Registered protocol family 17
[    3.208236] Key type dns_resolver registered
[    3.219945] ThumbEE CPU extension supported.
[    3.219955] Registering SWP/SWPB emulation handler
[    3.228469] registered taskstats version 1
[    3.228534] zswap: loaded using pool lzo/zbud
[    3.243146] Btrfs loaded, crc32c=crc32c-generic
[    3.249032] mmc0: new high speed SDHC card at address aaaa
[    3.255243] mmcblk0: mmc0:aaaa SL16G 14.8 GiB 
[    3.258268] (NULL device *): hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
[    3.258476] imx_thermal 2000000.aips-bus:tempmon: Extended Commercial CPU temperature grade - max:105C critical:100C passive:95C
[    3.259716] snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:00 UTC (0)
[    3.259722] sr_init: No PMIC hook to init smartreflex
[    3.259823] sr_init: platform driver register failed for SR
[    3.260361] lcd_panel: disabling
[    3.260363] ALSA device list:
[    3.260367]   No soundcards found.

-------------- next part --------------
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] random: get_random_bytes called from start_kernel+0x34/0x404 with crng_init=0
[    0.000000] Linux version 4.13.0-1-ARCH (builduser at leming) (gcc version 7.1.1 20170630 (GCC)) #1 SMP Tue Sep 5 02:22:08 UTC 2017
[    0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Udoo i.MX6 Quad Board
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] cma: Reserved 48 MiB at 0x4d000000
[    0.000000] percpu: Embedded 17 pages/cpu @ef693000 s37516 r8192 d23924 u69632
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 260416
[    0.000000] Kernel command line: console=ttymxc1,115200 ip=dhcp root=PARTUUID=a8f8549b-01 rw rootwait video=
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Memory: 963520K/1048576K available (11264K kernel code, 1017K rwdata, 4580K rodata, 2048K init, 899K bss, 35904K reserved, 49152K cma-reserved, 212992K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xf0800000 - 0xff800000   ( 240 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xf0000000   ( 768 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc0c00000   (12256 kB)
[    0.000000]       .init : 0xc1100000 - 0xc1300000   (2048 kB)
[    0.000000]       .data : 0xc1300000 - 0xc13fe720   (1018 kB)
[    0.000000]        .bss : 0xc1409234 - 0xc14ea07c   ( 900 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] L2C-310 errata 752271 769419 enabled
[    0.000000] L2C-310 enabling early BRESP for Cortex-A9
[    0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[    0.000000] L2C-310 ID prefetch enabled, offset 16 lines
[    0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000] L2C-310 cache controller enabled, 16 ways, 1024 kB
[    0.000000] L2C-310: CACHE_ID 0x410000c7, AUX_CTRL 0x76470001
[    0.000000] Switching to timer-based delay loop, resolution 333ns
[    0.000008] sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 715827882841ns
[    0.000032] clocksource: mxc_timer1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 637086815595 ns
[    0.002440] Console: colour dummy device 80x30
[    0.002474] Calibrating delay loop (skipped), value calculated using timer frequency.. 6.00 BogoMIPS (lpj=12000)
[    0.002490] pid_max: default: 32768 minimum: 301
[    0.002765] Security Framework initialized
[    0.002948] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.002963] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.003663] CPU: Testing write buffer coherency: ok
[    0.003992] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.004363] Setting up static identity map for 0x10100000 - 0x101000a0
[    0.005946] Hierarchical SRCU implementation.
[    0.007578] smp: Bringing up secondary CPUs ...
[    0.008278] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.009060] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[    0.009815] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[    0.009907] smp: Brought up 1 node, 4 CPUs
[    0.009929] SMP: Total of 4 processors activated (24.00 BogoMIPS).
[    0.009936] CPU: All CPU(s) started in SVC mode.
[    0.010921] devtmpfs: initialized
[    0.020719] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[    0.021049] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.021070] futex hash table entries: 1024 (order: 4, 65536 bytes)
[    0.023833] xor: measuring software checksum speed
[    0.063349]    arm4regs  :  1226.000 MB/sec
[    0.103348]    8regs     :   952.000 MB/sec
[    0.143350]    32regs    :  1012.000 MB/sec
[    0.183348]    neon      :   897.000 MB/sec
[    0.183358] xor: using function: arm4regs (1226.000 MB/sec)
[    0.183455] pinctrl core: initialized pinctrl subsystem
[    0.185073] NET: Registered protocol family 16
[    0.188072] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.190088] cpuidle: using governor menu
[    0.190893] CPU identified as i.MX6Q, silicon rev 1.2
[    0.197517] vdd1p1: supplied by regulator-dummy
[    0.198061] vdd3p0: supplied by regulator-dummy
[    0.198529] vdd2p5: supplied by regulator-dummy
[    0.199032] vddarm: supplied by regulator-dummy
[    0.199502] vddpu: supplied by regulator-dummy
[    0.199964] vddsoc: supplied by regulator-dummy
[    0.209527] No ATAGs?
[    0.209672] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
[    0.209685] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.211375] imx6q-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
[    0.212546] Serial: AMBA PL011 UART driver
[    0.291893] raid6: int32x1  gen()   104 MB/s
[    0.359417] raid6: int32x1  xor()   143 MB/s
[    0.427594] raid6: int32x2  gen()   165 MB/s
[    0.495448] raid6: int32x2  xor()   169 MB/s
[    0.563567] raid6: int32x4  gen()   191 MB/s
[    0.631478] raid6: int32x4  xor()   158 MB/s
[    0.699368] raid6: int32x8  gen()   222 MB/s
[    0.767458] raid6: int32x8  xor()   153 MB/s
[    0.835411] raid6: neonx1   gen()   615 MB/s
[    0.903374] raid6: neonx1   xor()   454 MB/s
[    0.971370] raid6: neonx2   gen()   661 MB/s
[    1.039383] raid6: neonx2   xor()   576 MB/s
[    1.107385] raid6: neonx4   gen()   541 MB/s
[    1.175394] raid6: neonx4   xor()   523 MB/s
[    1.243395] raid6: neonx8   gen()   500 MB/s
[    1.311384] raid6: neonx8   xor()   448 MB/s
[    1.311392] raid6: using algorithm neonx2 gen() 661 MB/s
[    1.311399] raid6: .... xor() 576 MB/s, rmw enabled
[    1.311406] raid6: using intx1 recovery algorithm
[    1.324562] mxs-dma 110000.dma-apbh: initialized
[    1.329785] vgaarb: loaded
[    1.330621] SCSI subsystem initialized
[    1.331082] usbcore: registered new interface driver usbfs
[    1.331147] usbcore: registered new interface driver hub
[    1.331255] usbcore: registered new device driver usb
[    1.332463] i2c i2c-1: IMX I2C adapter registered
[    1.332482] i2c i2c-1: can't use DMA, using PIO instead.
[    1.332976] i2c i2c-2: IMX I2C adapter registered
[    1.332991] i2c i2c-2: can't use DMA, using PIO instead.
[    1.333847] media: Linux media interface: v0.10
[    1.333894] Linux video capture interface: v2.00
[    1.333973] pps_core: LinuxPPS API ver. 1 registered
[    1.333981] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    1.334002] PTP clock support registered
[    1.334038] EDAC MC: Ver: 3.0.0
[    1.335069] Advanced Linux Sound Architecture Driver Initialized.
[    1.335607] NetLabel: Initializing
[    1.335617] NetLabel:  domain hash size = 128
[    1.335625] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    1.335687] NetLabel:  unlabeled traffic allowed by default
[    1.336063] clocksource: Switched to clocksource mxc_timer1
[    1.336256] VFS: Disk quotas dquot_6.6.0
[    1.336360] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    1.345821] NET: Registered protocol family 2
[    1.346428] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[    1.346507] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[    1.346636] TCP: Hash tables configured (established 8192 bind 8192)
[    1.346748] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    1.346793] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    1.347003] NET: Registered protocol family 1
[    1.347495] RPC: Registered named UNIX socket transport module.
[    1.347505] RPC: Registered udp transport module.
[    1.347511] RPC: Registered tcp transport module.
[    1.347518] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.347941] Unpacking initramfs...
[    1.714776] Freeing initrd memory: 5008K
[    1.715356] hw perfevents: no interrupt-affinity property for /soc/pmu, guessing.
[    1.715640] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
[    1.718605] workingset: timestamp_bits=14 max_order=18 bucket_order=4
[    1.723767] zbud: loaded
[    1.726213] NFS: Registering the id_resolver key type
[    1.726238] Key type id_resolver registered
[    1.726245] Key type id_legacy registered
[    1.726263] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    1.727858] random: fast init done
[    1.733239] Key type asymmetric registered
[    1.733295] bounce: pool size: 64 pages
[    1.733358] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246)
[    1.733496] io scheduler noop registered
[    1.733506] io scheduler deadline registered
[    1.733821] io scheduler cfq registered (default)
[    1.733831] io scheduler mq-deadline registered
[    1.733838] io scheduler kyber registered
[    1.734094] io scheduler bfq registered
[    1.749874] imx-sdma 20ec000.sdma: Direct firmware load for imx/sdma/sdma-imx6q.bin failed with error -2
[    1.749892] imx-sdma 20ec000.sdma: external firmware not found, using ROM firmware
[    1.754939] imx-pgc-pd imx-pgc-power-domain.0: Linked as a consumer to 20dc000.gpc
[    1.755120] imx-pgc-pd imx-pgc-power-domain.1: Linked as a consumer to 20dc000.gpc
[    1.759024] Serial: 8250/16550 driver, 6 ports, IRQ sharing disabled
[    1.761556] Serial: AMBA driver
[    1.762386] 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 62, base_baud = 5000000) is a IMX
[    2.670024] console [ttymxc1] enabled
[    2.685885] loop: module loaded
[    2.690484] Loading iSCSI transport class v2.0-870.
[    2.695813] iscsi: registered transport (tcp)
[    2.701174] ahci-imx 2200000.sata: fsl,transmit-level-mV not specified, using 00000024
[    2.709129] ahci-imx 2200000.sata: fsl,transmit-boost-mdB not specified, using 00000480
[    2.717169] ahci-imx 2200000.sata: fsl,transmit-atten-16ths not specified, using 00002000
[    2.725372] ahci-imx 2200000.sata: fsl,receive-eq-mdB not specified, using 05000000
[    2.735871] ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled
[    2.742889] ahci-imx 2200000.sata: AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl platform mode
[    2.751706] ahci-imx 2200000.sata: flags: ncq sntf stag pm led clo only pmp pio slum part ccc apst 
[    2.762126] scsi host0: ahci-imx
[    2.765673] ata1: SATA max UDMA/133 mmio [mem 0x02200000-0x02203fff] port 0x100 irq 65
[    2.777820] libphy: Fixed MDIO Bus: probed
[    2.783439] fec 2188000.ethernet: 2188000.ethernet supply phy not found, using dummy regulator
[    2.792546] pps pps0: new PPS source ptp0
[    2.808803] libphy: fec_enet_mii_bus: probed
[    2.813711] fec 2188000.ethernet eth0: registered PHC device 0
[    2.822742] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    2.829297] ehci-pci: EHCI PCI platform driver
[    2.833802] ehci-platform: EHCI generic platform driver
[    2.839273] ehci-mxc: Freescale On-Chip EHCI Host driver
[    2.844738] ehci-omap: OMAP-EHCI Host Controller driver
[    2.850161] ehci-orion: EHCI orion driver
[    2.854363] ehci-exynos: EHCI EXYNOS driver
[    2.858729] tegra-ehci: Tegra EHCI driver
[    2.862934] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    2.869154] ohci-pci: OHCI PCI platform driver
[    2.873664] ohci-platform: OHCI generic platform driver
[    2.879103] ohci-exynos: OHCI EXYNOS driver
[    2.883911] usbcore: registered new interface driver uas
[    2.889302] usbcore: registered new interface driver usb-storage
[    2.895361] usbcore: registered new interface driver ums-cypress
[    2.901417] usbcore: registered new interface driver ums_eneub6250
[    2.907656] usbcore: registered new interface driver ums-freecom
[    2.913712] usbcore: registered new interface driver ums-isd200
[    2.919681] usbcore: registered new interface driver ums-usbat
[    2.932280] ci_hdrc ci_hdrc.0: EHCI Host Controller
[    2.937237] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[    2.960087] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[    2.965682] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    2.972505] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    2.979748] usb usb1: Product: EHCI Host Controller
[    2.984647] usb usb1: Manufacturer: Linux 4.13.0-1-ARCH ehci_hcd
[    2.990670] usb usb1: SerialNumber: ci_hdrc.0
[    2.995647] hub 1-0:1.0: USB hub found
[    2.999454] hub 1-0:1.0: 1 port detected
[    3.007572] snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered 20cc000.snvs:snvs-rtc-lp as rtc0
[    3.017428] i2c /dev entries driver
[    3.029587] sdhci: Secure Digital Host Controller Interface driver
[    3.035794] sdhci: Copyright(c) Pierre Ossman
[    3.041276] Synopsys Designware Multimedia Card Interface Driver
[    3.048175] VUB300 Driver rom wait states = 1C irqpoll timeout = 0400
[    3.048555] usbcore: registered new interface driver vub300
[    3.060664] usbcore: registered new interface driver ushc
[    3.066877] sdhci-pltfm: SDHCI platform and OF driver helper
[    3.073435] sdhci-esdhc-imx 2198000.usdhc: could not get ultra high speed state, work on normal mode
[    3.086566] ata1: SATA link down (SStatus 0 SControl 300)
[    3.092025] ahci-imx 2200000.sata: no device found, disabling link.
[    3.098318] ahci-imx 2200000.sata: pass ahci_imx..hotplug=1 to enable hotplug
[    3.128108] mmc0: SDHCI controller on 2198000.usdhc [2198000.usdhc] using ADMA
[    3.142412] ledtrig-cpu: registered to indicate activity on CPUs
[    3.148711] hidraw: raw HID events driver (C) Jiri Kosina
[    3.154457] usbcore: registered new interface driver usbhid
[    3.160065] usbhid: USB HID core driver
[    3.174811] NET: Registered protocol family 10
[    3.200874] Segment Routing with IPv6
[    3.204603] mmc0: host does not support reading read-only switch, assuming write-enable
[    3.208142] mip6: Mobile IPv6
[    3.208151] NET: Registered protocol family 17
[    3.208222] Key type dns_resolver registered
[    3.220106] ThumbEE CPU extension supported.
[    3.220117] Registering SWP/SWPB emulation handler
[    3.220669] registered taskstats version 1
[    3.220748] zswap: loaded using pool lzo/zbud
[    3.243304] Btrfs loaded, crc32c=crc32c-generic
[    3.252093] mmc0: new high speed SDHC card at address aaaa
[    3.258304] mmcblk0: mmc0:aaaa SL16G 14.8 GiB 
[    3.258679] (NULL device *): hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
[    3.258858] imx_thermal 2000000.aips-bus:tempmon: Extended Commercial CPU temperature grade - max:105C critical:100C passive:95C
[    3.274971] snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:00 UTC (0)
[    3.274978] sr_init: No PMIC hook to init smartreflex
[    3.275091] sr_init: platform driver register failed for SR
[    3.287857] Generic PHY 2188000.ethernet-1:06: attached PHY driver [Generic PHY] (mii_bus:phy_addr=2188000.ethernet-1:06, irq=-1)
[    3.287957] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[    3.334213]  mmcblk0: p1
[    3.380077] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[    3.532496] usb 1-1: New USB device found, idVendor=0424, idProduct=2514
[    3.539222] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    3.547022] hub 1-1:1.0: USB hub found
[    3.550989] hub 1-1:1.0: 4 ports detected
[    3.844068] usb 1-1.3: new high-speed USB device number 3 using ci_hdrc
[    3.977994] usb 1-1.3: New USB device found, idVendor=148f, idProduct=5370
[    3.984895] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    3.992220] usb 1-1.3: Product: 802.11 n WLAN
[    3.996595] usb 1-1.3: Manufacturer: Ralink
[    4.000792] usb 1-1.3: SerialNumber: 1.0
[    6.364465] fec 2188000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[    6.376084] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[    6.396061] Sending DHCP requests ., OK
[    6.415927] IP-Config: Got DHCP answer from 192.168.14.1, my address is 192.168.14.192
[    6.423870] IP-Config: Complete:
[    6.427118]      device=eth0, hwaddr=00:c0:08:88:24:8c, ipaddr=192.168.14.192, mask=255.255.255.0, gw=192.168.14.1
[    6.437482]      host=192.168.14.192, domain=fritz.box, nis-domain=(none)
[    6.444287]      bootserver=192.168.14.1, rootserver=192.168.14.1, rootpath=     nameserver0=192.168.14.1
[    6.454206] lcd_panel: disabling
[    6.457472] ALSA device list:
[    6.460460]   No soundcards found.
[    6.465656] Freeing unused kernel memory: 2048K
:: running early hook [udev]
Warning: /lib/modules/4.13.0-1-ARCH/modules.devname not found - ignoring
starting version 236
:: running hook [udev]
:: Triggering uevents...
:: performing fsck on '/dev/mmcblk0p1'
/dev/mmcblk0p1: recovering journal
/dev/mmcblk0p1: clean, 37714/972944 files, 389545/3888512 blocks
:: mounting '/dev/mmcblk0p1' on real root
[    7.664636] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)
:: running cleanup hook [udev]
[    8.226335] systemd[1]: System time before build time, advancing clock.
[    8.309100] ip_tables: (C) 2000-2006 Netfilter Core Team
[    8.345183] systemd[1]: systemd 236 running in system mode. (+PAM -AUDIT -SELINUX -IMA -APPARMOR +SMACK -SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN default-hierarchy=hybrid)
[    8.366279] systemd[1]: Detected architecture arm.

Welcome to Arch Linux ARM!

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Fabio Estevam]

Hi Markus,

On Thu, Jan 18, 2018 at 9:29 PM, Markus Rathgeb <maggu2810@gmail.com> wrote:

> Please let me know if I could add more information or could do some
> further tests etc.

Please test my patch and send your Tested-by tag if it works for you.

It allows to boot fine on my imx6q-udoo board.

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Fabio Estevam]

Hi Maciej,

On Thu, Jan 18, 2018 at 9:11 PM, Maciej S. Szmigiero
<mail@maciej.szmigiero.name> wrote:

> Hmm, did you get reports or checked that it actually hangs?

Both :-)

>
> As far as I remember last time I ran a kernel without Peter's power
> sequence library on this board it only wasn't able to communicate with
> the on-board USB hub (and devices behind it), but besides this was
> able to boot successfully.
> But my memory may be wrong since it was some time ago.

Currently we are not able to reach the prompt without this patch as
the system hangs.

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Maciej S. Szmigiero]

On 19.01.2018 12:59, Fabio Estevam wrote:
> Hi Maciej,
> 
> On Thu, Jan 18, 2018 at 9:11 PM, Maciej S. Szmigiero
> <mail@maciej.szmigiero.name> wrote:
> 
>> Hmm, did you get reports or checked that it actually hangs?
> 
> Both :-)
> 
>>
>> As far as I remember last time I ran a kernel without Peter's power
>> sequence library on this board it only wasn't able to communicate with
>> the on-board USB hub (and devices behind it), but besides this was
>> able to boot successfully.
>> But my memory may be wrong since it was some time ago.
> 
> Currently we are not able to reach the prompt without this patch as
> the system hangs.
> 

Okay, then:
Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>

@Peter:
If you are going to submit your power sequence library once again could
you please add this patch reversion to your UDOO DT changes in that
series for completeness?

Maciej

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Markus Rathgeb]

2018-01-18 13:34 GMT+01:00 Fabio Estevam <fabio.estevam@nxp.com>:
> Currently the kernel hangs when USB Host1 is enabled due to the lack of
> support for controlling the USB hub clock and GPIO reset line.
>
> Peter Chen has made several attempts to fix this problem, but his series
> has not been applied yet, so better disable USB host1 for now to avoid
> the kernel hang.
>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
> ---
>  arch/arm/boot/dts/imx6qdl-udoo.dtsi | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
> index 4161b7d..1f0b9f6 100644
> --- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
> @@ -274,7 +274,8 @@
>         pinctrl-0 = <&pinctrl_usbh>;
>         vbus-supply = <&reg_usb_h1_vbus>;
>         clocks = <&clks IMX6QDL_CLK_CKO>;
> -       status = "okay";
> +       /* currently USB support causes a kernel hang. Disable it for now */
> +       status = "disabled";
>  };
>
>  &usdhc3 {
> --
> 2.7.4
>

I tested the patch that sets usbh1's status to disable using the
kernel 4.13 that previously hangs.
I confirm the disabled usb host allows to boot my imx6q-udoo board.

Tested-by: Markus Rathgeb <maggu2810@gmail.com>

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Markus Rathgeb]

Hi Fabio,

have you seen my message from

2018-01-20 10:14 GMT+01:00 Markus Rathgeb <maggu2810@gmail.com>:
>
>
> I tested the patch that sets usbh1's status to disable using the
> kernel 4.13 that previously hangs.
> I confirm the disabled usb host allows to boot my imx6q-udoo board.
>
> Tested-by: Markus Rathgeb <maggu2810@gmail.com>

or missed I some further messages on that topic?

With your changes the board will boot again, so a step forward (but
USB will not working).

I recently read the "Linux Kernel Release Model"
(http://kroah.com/log/blog/2018/02/05/linux-kernel-release-model/) and
stumbled about that sentence: "The Linux kernel community has promised
its userbase that no upgrade will ever break anything that is
currently working in a previous release."
I used the Udoo board a long time for my USB printer to access it over
the network. So USB has been working in a release but does not work
anymore.
"Regressions do happen, but those are the highest priority bugs and
are either quickly fixed, or the change that caused the regression is
quickly reverted from the Linux kernel tree."
So, can we expect that USB will be working soon again or are such
boards an exception to that overcome?

Best regards,
Markus

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Fabio Estevam]

Hi Markus,

On Sun, Feb 11, 2018 at 11:47 AM, Markus Rathgeb <maggu2810@gmail.com> wrote:
> Hi Fabio,
>
> have you seen my message from
>
> 2018-01-20 10:14 GMT+01:00 Markus Rathgeb <maggu2810@gmail.com>:
>>
>>
>> I tested the patch that sets usbh1's status to disable using the
>> kernel 4.13 that previously hangs.
>> I confirm the disabled usb host allows to boot my imx6q-udoo board.
>>
>> Tested-by: Markus Rathgeb <maggu2810@gmail.com>
>
> or missed I some further messages on that topic?

Shawn will probably apply the patch in the 4.16 cycle.

>
> With your changes the board will boot again, so a step forward (but
> USB will not working).

Correct.

>
> I recently read the "Linux Kernel Release Model"
> (http://kroah.com/log/blog/2018/02/05/linux-kernel-release-model/) and
> stumbled about that sentence: "The Linux kernel community has promised
> its userbase that no upgrade will ever break anything that is
> currently working in a previous release."
> I used the Udoo board a long time for my USB printer to access it over
> the network. So USB has been working in a release but does not work
> anymore.
> "Regressions do happen, but those are the highest priority bugs and
> are either quickly fixed, or the change that caused the regression is
> quickly reverted from the Linux kernel tree."

In the case of Udoo USB it has only worked by "luck".

A decent implementation requires to be able to drive USB hub clock and
reset lines.

Unfortunately this is still not supported in mainline kernel.

> So, can we expect that USB will be working soon again or are such
> boards an exception to that overcome?

Peter Chen has been working to fix the USB issue (his last series was
v17 as far as a recall).

Feel free to take his series, address the maintainers feedback and re-post it.

Regards,

Fabio Estevam

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Fabio Estevam]

Hi Markus,

On Sun, Feb 11, 2018 at 11:58 AM, Fabio Estevam <festevam@gmail.com> wrote:

>> With your changes the board will boot again, so a step forward (but
>> USB will not working).

If you re-enable USBH1 and apply this quick hack:

--- a/drivers/clk/imx/clk-imx6q.c
+++ b/drivers/clk/imx/clk-imx6q.c
@@ -920,5 +920,11 @@ static void __init imx6q_clocks_init(struct
device_node *ccm_node)
        }

        imx_register_uart_clocks(uart_clks);
+
+       if (of_machine_is_compatible("udoo,imx6dl-udoo") ||
+           of_machine_is_compatible("udoo,imx6q-udoo"))
+               clk_prepare_enable(clk[IMX6QDL_CLK_CKO]);
+
 }
 CLK_OF_DECLARE(imx6q, "fsl,imx6q-ccm", imx6q_clocks_init);

Does USB work again?

I don't have access to my udoo board at the moment.

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Markus Rathgeb]

Hi Fabio,

thank you for your support.

> If you re-enable USBH1 and apply this quick hack:
>
> --- a/drivers/clk/imx/clk-imx6q.c
> +++ b/drivers/clk/imx/clk-imx6q.c
> @@ -920,5 +920,11 @@ static void __init imx6q_clocks_init(struct
> device_node *ccm_node)
>         }
>
>         imx_register_uart_clocks(uart_clks);
> +
> +       if (of_machine_is_compatible("udoo,imx6dl-udoo") ||
> +           of_machine_is_compatible("udoo,imx6q-udoo"))
> +               clk_prepare_enable(clk[IMX6QDL_CLK_CKO]);
> +
>  }
>  CLK_OF_DECLARE(imx6q, "fsl,imx6q-ccm", imx6q_clocks_init);
>
> Does USB work again?

at least "modprobe -v rt2800usb" still results in a freeze.

[PATCH] ARM: dts: imx6qdl-udoo: Disable usbh1 to avoid kernel hang

[Shawn Guo]

On Thu, Jan 18, 2018 at 10:34:18AM -0200, Fabio Estevam wrote:
> Currently the kernel hangs when USB Host1 is enabled due to the lack of
> support for controlling the USB hub clock and GPIO reset line.
> 
> Peter Chen has made several attempts to fix this problem, but his series
> has not been applied yet, so better disable USB host1 for now to avoid
> the kernel hang.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

The commit log is not clear enough to tell why it works for v4.12 and
doesn't for 4.13 and later ones.

Shawn

> ---
>  arch/arm/boot/dts/imx6qdl-udoo.dtsi | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
> index 4161b7d..1f0b9f6 100644
> --- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
> @@ -274,7 +274,8 @@
>  	pinctrl-0 = <&pinctrl_usbh>;
>  	vbus-supply = <&reg_usb_h1_vbus>;
>  	clocks = <&clks IMX6QDL_CLK_CKO>;
> -	status = "okay";
> +	/* currently USB support causes a kernel hang. Disable it for now */
> +	status = "disabled";
>  };
>  
>  &usdhc3 {
> -- 
> 2.7.4
> 
> 
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