Debugging LCD and encountering NULL pointer in omap_vout_probe

[Jason Kridner <jkridner-hcmAuCOw+vXj4SYmN/TMmA@public.gmane.org>]

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Any ideas on debugging this crash in omap_vout_probe?  This is a 3.0.4 
kernel with PM patches applied from Kevin's tree.

Built using: 
https://gitorious.org/beagleboard-validation/linux/commits/ulcd-20110907

Texas Instruments X-Loader 1.5.1 (Aug 26 2011 - 21:46:42)
Beagle xM
Reading boot sector
Loading u-boot.bin from mmc


U-Boot 2011.06-00573-gd9205c3 (Sep 06 2011 - 18:57:15)

OMAP3630/3730-GP ES2.1, CPU-OPP2, L3-165MHz, Max CPU Clock 1 Ghz
OMAP3 Beagle board + LPDDR/NAND
I2C:   ready
DRAM:  512 MiB
NAND:  0 MiB
MMC:   OMAP SD/MMC: 0
*** Warning - readenv() failed, using default environment

In:    serial
Out:   serial
Err:   serial
Beagle xM Rev C
No EEPROM on expansion board
Die ID #497c00029ff80000015f26ad0f01a02e
Net:   Net Initialization Skipped
No ethernet found.
Hit any key to stop autoboot:  0 
OMAP3 beagleboard.org # version

U-Boot 2011.06-00573-gd9205c3 (Sep 06 2011 - 18:57:15)
arm-angstrom-linux-gnueabi-gcc (GCC) 4.5.4 20110722 (prerelease)
GNU ld (GNU Binutils) 2.20.1.20100303
OMAP3 beagleboard.org # boot
The user button is currently NOT pressed.
SD/MMC found on device 0
reading uEnv.txt

606 bytes read
Loaded environment from uEnv.txt
Importing environment from mmc ...
Running uenvcmd ...
Setting bus to 1
Setting bus to 0
Loading file "/boot/uImage" from mmc device 0:2 (xxa2)
3364936 bytes read
Booting from mmc ...
## Booting kernel from Legacy Image at 80200000 ...
   Image Name:   Linux-3.0.4+
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3364872 Bytes = 3.2 MiB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.0.4+ (jkridner@D620) (gcc version 4.5.4 
20110722 (prerelease) (GCC) ) #2 Tue Sep 6 19:27:55 EDT 2011
[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), 
cr=10c53c7f
[    0.000000] CPU: VIPT nonaliasing data cache, VIPT aliasing instruction 
cache
[    0.000000] Machine: OMAP3 Beagle Board
[    0.000000] Beagle expansionboard: none
[    0.000000] Reserving 16777216 bytes SDRAM for VRAM
[    0.000000] Memory policy: ECC disabled, Data cache writeback
[    0.000000] OMAP3630 ES1.2 (l2cache iva sgx neon isp 192mhz_clk )
[    0.000000] SRAM: Mapped pa 0x40200000 to va 0xfe400000 size: 0x10000
[    0.000000] Clocking rate (Crystal/Core/MPU): 26.0/332/600 MHz
[    0.000000] Reprogramming SDRC clock to 332000000 Hz
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total 
pages: 118528
[    0.000000] Kernel command line: console=tty0 console=ttyO2,115200n8 
mem=99M@0x80000000 mem=384M@0x88000000 mpurate=auto buddy=none camera=none 
vram=16M omapfb.mode=dvi:800x480MR-24@60 omapfb.vram=0:8M,1:4M,2:4M 
omapfb.debug=y omapfbt
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 
bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 
bytes)
[    0.000000] allocated 2097152 bytes of page_cgroup
[    0.000000] please try 'cgroup_disable=memory' option if you don't want 
memory cgroups
[    0.000000] Memory: 99MB 368MB = 467MB total
[    0.000000] Memory: 464924k/464924k available, 29668k reserved, 0K 
highmem
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
[    0.000000]     DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
[    0.000000]     vmalloc : 0xe0800000 - 0xf8000000   ( 376 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)
[    0.000000]       .init : 0xc0008000 - 0xc003d000   ( 212 kB)
[    0.000000]       .text : 0xc003d000 - 0xc063d130   (6145 kB)
[    0.000000]       .data : 0xc063e000 - 0xc0689600   ( 302 kB)
[    0.000000]        .bss : 0xc0689624 - 0xc06c2af0   ( 230 kB)
[    0.000000] NR_IRQS:410
[    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96 
interrupts
[    0.000000] Total of 96 interrupts on 1 active controller
[    0.000000] OMAP clockevent source: GPTIMER1 at 32768 Hz
[    0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps 
every 131071999ms
[    0.000000] Console: colour dummy device 80x30
[    0.000000] console [tty0] enabled
[    0.000701] Calibrating delay loop... 597.64 BogoMIPS (lpj=2334720)
[    0.039154] pid_max: default: 32768 minimum: 301
[    0.039337] Mount-cache hash table entries: 512
[    0.039703] Initializing cgroup subsys cpuacct
[    0.039733] Initializing cgroup subsys memory
[    0.039794] Initializing cgroup subsys devices
[    0.039825] Initializing cgroup subsys freezer
[    0.039855] Initializing cgroup subsys blkio
[    0.039886] Initializing cgroup subsys perf_event
[    0.039978] CPU: Testing write buffer coherency: ok
[    0.040740] devtmpfs: initialized
[    0.042114] omap_hwmod: gpt12_fck: missing clockdomain for gpt12_fck.
[    0.044250] print_constraints: dummy: 
[    0.044494] NET: Registered protocol family 16
[    0.044677] GPMC revision 5.0
[    0.045989] OMAP GPIO hardware version 2.5
[    0.046173] OMAP GPIO hardware version 2.5
[    0.046386] OMAP GPIO hardware version 2.5
[    0.046569] OMAP GPIO hardware version 2.5
[    0.046752] OMAP GPIO hardware version 2.5
[    0.047058] OMAP GPIO hardware version 2.5
[    0.047546] omap_mux_init: Add partition: #1: core, flags: 0
[    0.048767] OMAP3 Beagle Rev: xM C
[    0.053070] Found NAND on CS0
[    0.053100] Registering NAND on CS0
[    0.053436] Unable to get DVI reset GPIO
[    0.053497] hw-breakpoint: debug architecture 0x4 unsupported.
[    0.055541] omap_device: omap-mcbsp.2: alias fck already exists
[    0.055725] omap_device: omap-mcbsp.3: alias fck already exists
[    0.056671] OMAP DMA hardware revision 5.0
[    0.065063] bio: create slab <bio-0> at 0
[    0.066162] SCSI subsystem initialized
[    0.067321] usbcore: registered new interface driver usbfs
[    0.067474] usbcore: registered new interface driver hub
[    0.067657] usbcore: registered new device driver usb
[    0.068359] omap_i2c omap_i2c.1: bus 1 rev4.0 at 2600 kHz
[    0.070953] twl4030: PIH (irq 7) chaining IRQs 368..375
[    0.071014] twl4030: power (irq 373) chaining IRQs 376..383
[    0.071472] twl4030: gpio (irq 368) chaining IRQs 384..401
[    0.074554] print_constraints: VUSB1V5: 1500 mV normal standby
[    0.074981] print_constraints: VUSB1V8: 1800 mV normal standby
[    0.075378] print_constraints: VUSB3V1: 3100 mV normal standby
[    0.077117] twl4030_usb twl4030_usb: Initialized TWL4030 USB module
[    0.077789] print_constraints: VMMC1: 1850 <--> 3150 mV at 3000 mV normal 
standby
[    0.078277] print_constraints: VDAC: 1800 mV normal standby
[    0.078704] print_constraints: VDVI: 1800 mV normal standby
[    0.079193] print_constraints: VSIM: 1800 <--> 3000 mV at 1800 mV normal 
standby
[    0.093872] omap_i2c omap_i2c.3: bus 3 rev4.0 at 100 kHz
[    0.094573] Advanced Linux Sound Architecture Driver Version 1.0.24.
[    0.095214] Bluetooth: Core ver 2.16
[    0.095275] NET: Registered protocol family 31
[    0.095306] Bluetooth: HCI device and connection manager initialized
[    0.095336] Bluetooth: HCI socket layer initialized
[    0.095367] Bluetooth: L2CAP socket layer initialized
[    0.095550] Bluetooth: SCO socket layer initialized
[    0.095825] Switching to clocksource 32k_counter
[    0.101837] Switched to NOHz mode on CPU #0
[    0.106628] musb-hdrc: version 6.0, musb-dma, otg (peripheral+host)
[    0.109710] musb-hdrc musb-hdrc: USB OTG mode controller at fa0ab000 
using DMA, IRQ 92
[    0.110321] NET: Registered protocol family 2
[    0.110534] IP route cache hash table entries: 4096 (order: 2, 16384 
bytes)
[    0.110931] TCP established hash table entries: 16384 (order: 5, 131072 
bytes)
[    0.111297] TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
[    0.111511] TCP: Hash tables configured (established 16384 bind 16384)
[    0.111541] TCP reno registered
[    0.111572] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.111663] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.112060] NET: Registered protocol family 1
[    0.112884] RPC: Registered named UNIX socket transport module.
[    0.112945] RPC: Registered udp transport module.
[    0.112976] RPC: Registered tcp transport module.
[    0.112976] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.114135] omap-iommu omap-iommu.0: isp registered
[    0.127838] VFS: Disk quotas dquot_6.5.2
[    0.127929] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    0.128509] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.128875] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.128906] JFFS2 version 2.2. (NAND) (SUMMARY)  � 2001-2006 Red Hat, 
Inc.
[    0.129577] msgmni has been set to 908
[    0.131011] Block layer SCSI generic (bsg) driver version 0.4 loaded 
(major 253)
[    0.131195] io scheduler noop registered
[    0.131225] io scheduler deadline registered
[    0.131286] io scheduler cfq registered (default)
[    0.189788] OMAP DSS rev 2.0
[    0.191925] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.193145] omap_uart.0: ttyO0 at MMIO 0x4806a000 (irq = 72) is a OMAP 
UART0
[    0.193450] omap_uart.1: ttyO1 at MMIO 0x4806c000 (irq = 73) is a OMAP 
UART1
[    0.193725] omap_uart.2: ttyO2 at MMIO 0x49020000 (irq = 74) is a OMAP 
UART2
[    0.941345] console [ttyO2] enabled
[    0.945312] omap_uart.3: ttyO3 at MMIO 0x49042000 (irq = 80) is a OMAP 
UART3
[    0.960327] brd: module loaded
[    0.967254] loop: module loaded
[    0.971984] omap2-nand driver initializing
[    0.976715] No NAND device found.
[    0.980499] No NAND device found.
[    0.984954] usbcore: registered new interface driver catc
[    0.990692] catc: v2.8:CATC EL1210A NetMate USB Ethernet driver
[    0.997009] usbcore: registered new interface driver kaweth
[    1.002929] pegasus: v0.6.14 (2006/09/27), Pegasus/Pegasus II USB 
Ethernet driver
[    1.011077] usbcore: registered new interface driver pegasus
[    1.017028] rtl8150: v0.6.2 (2004/08/27):rtl8150 based usb-ethernet 
driver
[    1.024383] usbcore: registered new interface driver rtl8150
[    1.030426] usbcore: registered new interface driver asix
[    1.036193] usbcore: registered new interface driver cdc_ether
[    1.042419] usbcore: registered new interface driver dm9601
[    1.048370] usbcore: registered new interface driver smsc95xx
[    1.054504] usbcore: registered new interface driver gl620a
[    1.060455] usbcore: registered new interface driver net1080
[    1.066497] usbcore: registered new interface driver plusb
[    1.072326] usbcore: registered new interface driver rndis_host
[    1.078643] usbcore: registered new interface driver cdc_subset
[    1.084960] usbcore: registered new interface driver zaurus
[    1.090911] usbcore: registered new interface driver MOSCHIP usb-ethernet 
driver
[    1.099060] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.106079] _regulator_get: ehci-omap.0 supply hsusb0 not found, using 
dummy regulator
[    1.114501] _regulator_get: ehci-omap.0 supply hsusb1 not found, using 
dummy regulator
[    3.135040] ehci-omap ehci-omap.0: OMAP-EHCI Host Controller
[    3.141448] ehci-omap ehci-omap.0: new USB bus registered, assigned bus 
number 1
[    3.149414] ehci-omap ehci-omap.0: irq 77, io mem 0x48064800
[    3.166320] ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00
[    3.172454] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    3.179626] usb usb1: New USB device strings: Mfr=3, Product=2, 
SerialNumber=1
[    3.187255] usb usb1: Product: OMAP-EHCI Host Controller
[    3.192871] usb usb1: Manufacturer: Linux 3.0.4+ ehci_hcd
[    3.198547] usb usb1: SerialNumber: ehci-omap.0
[    3.203948] hub 1-0:1.0: USB hub found
[    3.207946] hub 1-0:1.0: 3 ports detected
[    3.236663] Initializing USB Mass Storage driver...
[    3.241943] usbcore: registered new interface driver usb-storage
[    3.248321] USB Mass Storage support registered.
[    3.253692] mousedev: PS/2 mouse device common for all mice
[    3.260070] input: gpio-keys as /devices/platform/gpio-keys/input/input0
[    3.268524] input: twl4030_pwrbutton as 
/devices/platform/omap/omap_i2c.1/i2c-1/1-0049/twl4030_pwrbutton/input/input1
[    3.280242] i2c /dev entries driver
[    3.284393] Linux media interface: v0.10
[    3.288604] Linux video capture interface: v2.00
[    3.293701] vpfe_init
[    3.296691] OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec
[    3.303131] Bluetooth: HCI UART driver ver 2.2
[    3.307830] Bluetooth: HCI H4 protocol initialized
[    3.312866] Bluetooth: HCI BCSP protocol initialized
[    3.318115] Bluetooth: HCILL protocol initialized
[    3.323089] Bluetooth: HCIATH3K protocol initialized
[    3.328308] Bluetooth: Generic Bluetooth USB driver ver 0.6
[    3.334381] usbcore: registered new interface driver btusb
[    3.340270] cpuidle: using governor ladder
[    3.344573] cpuidle: using governor menu
[    3.351043] omap_hsmmc: probe of omap_hsmmc.1 failed with error -16
[    3.360168] usbcore: registered new interface driver usbhid
[    3.366088] usbhid: USB HID core driver
[    3.370635] usbcore: registered new interface driver snd-usb-audio
[    3.378021] OMAP3 Beagle/Devkit8000 SoC init
[    3.462554] asoc: twl4030-hifi <-> omap-mcbsp-dai.1 mapping ok
[    3.472076] ALSA device list:
[    3.475219]   #0: omap3beagle
[    3.478332] oprofile: hardware counters not available
[    3.483673] oprofile: using timer interrupt.
[    3.488677] TCP cubic registered
[    3.492126] NET: Registered protocol family 17
[    3.496887] hub 1-0:1.0: unable to enumerate USB device on port 2
[    3.503387] NET: Registered protocol family 15
[    3.508117] lib80211: common routines for IEEE802.11 drivers
[    3.514190] Registering the dns_resolver key type
[    3.519256] VFP support v0.3: implementor 41 architecture 3 part 30 
variant c rev 3
[    3.528411] ThumbEE CPU extension supported.
[    3.537292] omap_voltage_get_voltdata: Unable to match the current 
voltage with the voltagetable for vdd_mpu_iva
[    3.553222] sr_init: No PMIC hook to init smartreflex
[    3.558807] smartreflex smartreflex.0: omap_sr_probe: SmartReflex driver 
initialized
[    3.567199] smartreflex smartreflex.1: omap_sr_probe: SmartReflex driver 
initialized
[    3.575500] SmartReflex Class3 initialized
[    3.584259] clock: disabling unused clocks to save power
[    3.590789] registered taskstats version 1
[    3.595855] omapfb omapfb: no driver for display
[    3.600830] omapfb omapfb: failed to setup omapfb
[    3.606445] regulator_init_complete: VDVI: incomplete constraints, 
leaving on
[    3.614288] regulator_init_complete: VDAC: incomplete constraints, 
leaving on
[    3.622558] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[    3.629730] omapdss DPI: Could not find exact pixel clock. Requested 
23500 kHz, got 24000 kHz
[    3.669006] omap_vout omap_vout: : registered and initialized video 
device 0
[    3.676513] Unable to handle kernel NULL pointer dereference at virtual 
address 0000005c
[    3.685058] pgd = c0004000
[    3.687896] [0000005c] *pgd=00000000
[    3.691680] Internal error: Oops: 5 [#1]
[    3.695831] Modules linked in:
[    3.699066] CPU: 0    Not tainted  (3.0.4+ #2)
[    3.703735] PC is at omap_vout_probe+0x6b8/0x7e0
[    3.708618] LR is at omap_vout_probe+0x684/0x7e0
[    3.713470] pc : [<c00297bc>]    lr : [<c0029788>]    psr: 80000013
[    3.713500] sp : de82bec0  ip : 00000000  fp : 00000004
[    3.725585] r10: dea87bc8  r9 : dea87bc4  r8 : 00000186
[    3.731109] r7 : 00000184  r6 : dea87bc0  r5 : 00000000  r4 : 00000002
[    3.737976] r3 : 00000000  r2 : de82be7c  r1 : c05bb360  r0 : c0651f40
[    3.744842] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment 
kernel
[    3.752532] Control: 10c5387d  Table: 80004019  DAC: 00000015
[    3.758605] Process swapper (pid: 1, stack limit = 0xde82a2f0)
[    3.764739] Stack: (0xde82bec0 to 0xde82c000)
[    3.769317] bec0: 00000000 de819a40 00000030 dea87bc0 deb10c00 00000003 
00000003 dea87bdc
[    3.777954] bee0: dea87bc0 00000001 deb10c00 dea87bc0 de879878 00000004 
c064580c c06457d8
[    3.786560] bf00: c064580c c067be4c c067be4c 00000000 00000000 00000000 
00000000 c02a79b4
[    3.795196] bf20: c02a79a0 c02a6944 00000000 c06457d8 c064580c c067be4c 
00000000 c02a6a60
[    3.803802] bf40: c067be4c de82bf50 c02a6a00 c02a5bf4 de8076b8 de8736f0 
c067be4c c067be4c
[    3.812408] bf60: dea86440 c0671618 00000000 c02a6264 c058901c c0589021 
0000005f c067be4c
[    3.821044] bf80: c0031924 c0042cd4 c00290d8 00000000 00000000 c02a6f6c 
00000000 c0031914
[    3.829650] bfa0: c0031924 c0042cd4 c00290d8 00000000 00000000 c00290e4 
de82a000 c003d45c
[    3.838287] bfc0: c00290d8 c05ce3b4 c0689640 00000000 c0031914 c0031924 
c0042cd4 00000013
[    3.846893] bfe0: 00000000 c000894c 00000000 00000000 c00088c4 c0042cd4 
01100800 00000008
[    3.855529] [<c00297bc>] (omap_vout_probe+0x6b8/0x7e0) from [<c02a79b4>] 
(platform_drv_probe+0x14/0x18)
[    3.865447] [<c02a79b4>] (platform_drv_probe+0x14/0x18) from [<c02a6944>] 
(driver_probe_device+0xc8/0x184)
[    3.875610] [<c02a6944>] (driver_probe_device+0xc8/0x184) from 
[<c02a6a60>] (__driver_attach+0x60/0x84)
[    3.885528] [<c02a6a60>] (__driver_attach+0x60/0x84) from [<c02a5bf4>] 
(bus_for_each_dev+0x4c/0x78)
[    3.895050] [<c02a5bf4>] (bus_for_each_dev+0x4c/0x78) from [<c02a6264>] 
(bus_add_driver+0x98/0x210)
[    3.904602] [<c02a6264>] (bus_add_driver+0x98/0x210) from [<c02a6f6c>] 
(driver_register+0xa0/0x120)
[    3.914154] [<c02a6f6c>] (driver_register+0xa0/0x120) from [<c00290e4>] 
(omap_vout_init+0xc/0x2c)
[    3.923492] [<c00290e4>] (omap_vout_init+0xc/0x2c) from [<c003d45c>] 
(do_one_initcall+0x90/0x160)
[    3.932861] [<c003d45c>] (do_one_initcall+0x90/0x160) from [<c000894c>] 
(kernel_init+0x88/0x130)
[    3.942138] [<c000894c>] (kernel_init+0x88/0x130) from [<c0042cd4>] 
(kernel_thread_exit+0x0/0x8)
[    3.951416] Code: e3e05012 ea000016 e59a0094 e5903200 (e593c05c) 
[    3.957885] ---[ end trace cbb5c332507f77c9 ]---
[    3.962890] Kernel panic - not syncing: Attempted to kill init!

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