"Waiting for root device" Lock Up

[PaulDeMetrotion]

I am in the process of building a kernel for a custom iMX6 Single Board Computer. I am using the ltib tool and kernel version 3.0.35. I believe I am at the last error before I will get a login prompt. At the end of the entire kernel_init function I get stuck in the prepare_namespace function which has a printk statement of "Waiting for root device /dev/mmcblk0p1". I have copied the images and a file system to a micro-SD card on partition 1. It would appear that either my boot device is not named properly or it is not responding which probably isn't thecase since I already have accessed it quite a bit. The boot dump is here. Note that the printk is not displaying but I used an emulator to verify it did get executed.

U-Boot 2009.08 (Jan 24 2013 - 17:23:11)

CPU: Freescale i.MX6 family TO1.2 at 792 MHz
Temperature:   26 C, calibration data 0x5884c87d
mx6q pll1: 792MHz
mx6q pll2: 528MHz
mx6q pll3: 480MHz
mx6q pll8: 50MHz
ipg clock     : 66000000Hz
ipg per clock : 66000000Hz
uart clock    : 80000000Hz
cspi clock    : 60000000Hz
ahb clock     : 132000000Hz
axi clock   : 264000000Hz
emi_slow clock: 29333333Hz
ddr clock     : 528000000Hz
usdhc1 clock  : 198000000Hz
usdhc2 clock  : 198000000Hz
usdhc3 clock  : 198000000Hz
usdhc4 clock  : 198000000Hz
nfc clock     : 24000000Hz
Board: i.MX6Q-SBC-C398: unknown-board Board: 0x63012 [POR]
Boot Device: SD
I2C:   ready
DRAM:   2 GB
MMC:   FSL_USDHC: 0,FSL_USDHC: 1
In:    serial
Out:   serial
Err:   serial
Net:   got MAC address from IIM: 00:01:45:01:12:64
FEC0 [PRIME]
Hit any key to stop autoboot:  0
mmc0 is current device

MMC read: dev # 0, block # 2048, count 10240 ... 10240 blocks read: OK
## Booting kernel from Legacy Image at 10800000 ...
   Image Name:   Linux-3.0.35-1968-gd3f7f36
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3705484 Bytes =  3.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 3.0.35-1968-gd3f7f36 (pauldemet@ubuntu) (gcc version 4.6.2 2011063
0 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) )
#45 SMP PREEMPT Fri Jan 25 11:42:43 CST 2013
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: WinSystems i.MX 6Quad SBC35-C398 Board
Ignoring unrecognised tag 0x54410008
debug: skip boot console de-registration.
Memory policy: ECC disabled, Data cache writealloc
CPU identified as i.MX6Q, silicon rev 1.2
PERCPU: Embedded 7 pages/cpu @8c80e000 s5504 r8192 d14976 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 487424
Kernel command line: keep_bootcon console=ttymxc0,115200 root=/dev/mmcblk0p1 roo
twait rw
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 131072 (order: 7, 524288 bytes)
Memory: 640MB 1280MB = 1920MB total
Memory: 1936828k/1936828k available, 160324k reserved, 360448K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xf4600000 - 0xffe00000   ( 184 MB)
    vmalloc : 0xea800000 - 0xf2000000   ( 120 MB)
    lowmem  : 0x80000000 - 0xea000000   (1696 MB)
    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)
    modules : 0x7f000000 - 0x7fe00000   (  14 MB)
      .init : 0x80008000 - 0x80036000   ( 184 kB)
      .text : 0x80036000 - 0x80a3fba8   (10279 kB)
      .data : 0x80a40000 - 0x80a92340   ( 329 kB)
       .bss : 0x80a92364 - 0x80add7ac   ( 302 kB)
SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Preemptible hierarchical RCU implementation.
NR_IRQS:496
MXC GPIO hardware
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
MXC_Early serial console at MMIO 0x2020000 (options '115200')
bootconsole [ttymxc0] enabled
Console: colour dummy device 80x30
Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available
CPU1: Booted secondary processor
CPU2: Booted secondary processor
CPU3: Booted secondary processor
Brought up 4 CPUs
SMP: Total of 4 processors activated (6324.22 BogoMIPS).
print_constraints: dummy:
NET: Registered protocol family 16
print_constraints: vddpu: 725 <--> 1300 mV at 1100 mV fast normal
print_constraints: vddcore: 725 <--> 1300 mV at 1100 mV fast normal
print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal
print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal
print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal
print_constraints: vdd3p0: 2800 <--> 3150 mV at 3000 mV fast normal
hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.
hw-breakpoint: maximum watchpoint size is 4 bytes.
L310 cache controller enabled
l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B
IMX usb wakeup probe
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Freescale USB OTG Driver loaded, $Revision: 1.55 $
add wake up source irq 75
pca953x: probe of 0-0030 failed with error -22
pca953x: probe of 0-0032 failed with error -22
pca953x: probe of 0-0035 failed with error -22
MIPI CSI2 driver module loaded
Advanced Linux Sound Architecture Driver Version 1.0.24.
Bluetooth: Core ver 2.16
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
cfg80211: Calling CRDA to update world regulatory domain
i2c-core: driver [max17135] using legacy suspend method
i2c-core: driver [max17135] using legacy resume method
Switching to clocksource mxc_timer1
NET: Registered protocol family 2
IP route cache hash table entries: 65536 (order: 6, 262144 bytes)
TCP established hash table entries: 262144 (order: 9, 2097152 bytes)
TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
TCP: Hash tables configured (established 262144 bind 65536)
TCP reno registered
UDP hash table entries: 1024 (order: 3, 32768 bytes)
UDP-Lite hash table entries: 1024 (order: 3, 32768 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Static Power Management for Freescale i.MX6
wait mode is enabled for i.MX6
cpaddr = ea880000 suspend_iram_base=ea81e000
PM driver module loaded
IMX usb wakeup probe
i.MXC CPU frequency driver
highmem bounce pool size: 64 pages
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 3078
alg: No test for stdrng (krng)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
pwm-backlight pwm-backlight.0: unable to request PWM for backlight
pwm-backlight: probe of pwm-backlight.0 failed with error -2
MIPI DSI driver module loaded
imx-sdma imx-sdma: loaded firmware 1.1
imx-sdma imx-sdma: initialized
Serial: IMX driver
loop: module loaded
vcan: Virtual CAN interface driver
CAN device driver interface
flexcan netdevice driver
FEC Ethernet Driver
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000
fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
add wake up source irq 72
fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller
fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2
fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200
fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
ARC USBOTG Device Controller driver (1 August 2005)
mousedev: PS/2 mouse device common for all mice
i2c-core: driver [isl29023] using legacy suspend method
i2c-core: driver [isl29023] using legacy resume method
snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0
i2c /dev entries driver
Linux video capture interface: v2.00
i2c-core: driver [mag3110] using legacy suspend method
i2c-core: driver [mag3110] using legacy resume method
Bluetooth: Virtual HCI driver ver 1.3
Bluetooth: HCI UART driver ver 2.2
Bluetooth: HCIATH3K protocol initialized
Bluetooth: Generic Bluetooth USB driver ver 0.6
usbcore: registered new interface driver btusb
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci sdhci-esdhc-imx.1: no card-detect pin available!
mmc0: no vmmc regulator found
mmc0: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA
sdhci sdhci-esdhc-imx.2: no write-protect pin available!
sdhci sdhci-esdhc-imx.2: no card-detect pin available!
mmc1: no vmmc regulator found
mmc1: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA
sdhci sdhci-esdhc-imx.3: no write-protect pin available!
sdhci sdhci-esdhc-imx.3: no card-detect pin available!
mmc2: no vmmc regulator found
mmc2: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA
sdhci sdhci-esdhc-imx.-2137481312: clk err
Probing of sdhci-pltfm failed: -2
sdhci: probe of sdhci-esdhc-imx.-2137481312 failed with error -2
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
usbcore: registered new interface driver snd-usb-audio
mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio
imx-hdmi-soc-dai: probe of imx-hdmi-soc-dai.0 failed with error -12
ALSA device list:
  No soundcards found.
NET: Registered protocol family 26
TCP cubic registered
NET: Registered protocol family 17
can: controller area network core (rev 20090105 abi 8)
NET: Registered protocol family 29
can: raw protocol (rev 20090105)
can: broadcast manager protocol (rev 20090105 t)
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: HIDP (Human Interface Emulation) ver 1.2
lib80211: common routines for IEEE802.11 drivers
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
Bus freq driver module loaded
Bus freq driver Enabled
DVFS driver module loaded
regulator_init_complete: vddpu: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:00:00 UTC (0)

(printk of "Waiting for root device /dev/mmcblk0p1" - does not display on console)

[PaulDeMetrotion]

When have this problem, it is usually because I specified the wrong device for my file system. Your command line is:

Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk1p1 rootwait rw video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

Make sure your file system resides on device /dev/mmcblk1p1. You may need to change your environment variables to specify a different device - like /dev/mmcblk0p1 or /dev/mmcblk2p1.

[huangming]

thank you , we made mistake on card-detection pin ,we use different gpio pin ,after we correct the card-detect pin in bsp file(board-mx6q_sabresd.c board-mx6q_sabresd.c),we got different print log ,most time the log info like this

Waiting for root device /dev/mmcblk1p1...

mmc2: new high speed SDHC card at address 0002

mmcblk1: mmc2:0002 SD8GB 7.46 GiB

mmcblk1: p1

sometimes it can also go ahead like this

mmc2: new high speed SDHC card at address 0002

mmcblk1: mmc2:0002 SD8GB 7.46 GiB

mmcblk1: p1

EXT4-fs (mmcblk1p1): mounting ext3 file system using the ext4 subsystem

EXT4-fs (mmcblk1p1): mounted filesystem with ordered data mode. Opts: (null)

VFS: Mounted root (ext3 filesystem) on device 179:25.

devtmpfs: mounted

Freeing init memory: 204K

and also sometimes it go with some kernel panic .

[rayxianghoooo]

Hi , huanming

     Would you share your experience on how to fix it ?

     because i have the same problem to you now.

[OtavioSalvador]

This seems to be the card-detect pin issue so your hardware or kernel needs change.   

[huangming]

Paul,do you solve the problem , i met the same problem ,we have a demo board "MCIMX6Q-SDB" ,and it boot from SD3 ,and everything is fine on the demo board ,the boot ,the uImage and the rootfs runs ok ,but on the IMX6 QUAD FOR OURSELVES (which most of the Schematic diagram reference to the demo board Schematic ) , we also configure the boot device as SD3,and here the outputs from the debug uart:

U-Boot 2009.08 (May 31 2013 - 14:32:25)
CPU: Freescale i.MX6 family TO1.2 at 792 MHz

Temperature:   24 C, calibration data 0x55f4bd7d

mx6q pll1: 792MHz

mx6q pll2: 528MHz

mx6q pll3: 480MHz

mx6q pll8: 50MHz

ipg clock     : 66000000Hz

ipg per clock : 66000000Hz

uart clock    : 80000000Hz

cspi clock    : 60000000Hz

ahb clock     : 132000000Hz

axi clock   : 264000000Hz

emi_slow clock: 132000000Hz

ddr clock     : 528000000Hz

usdhc1 clock  : 198000000Hz

usdhc2 clock  : 198000000Hz

usdhc3 clock  : 198000000Hz

usdhc4 clock  : 198000000Hz

nfc clock     : 24000000Hz

Board: i.MX6Q-SABRESD: unknown-board Board: 0x63012 [POR ]

Boot Device: SD

I2C:   ready

DRAM:   1 GB

MMC:   FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3

In:    serial

Out:   serial

Err:   serial

i2c: I2C3 SDA is low, start i2c recovery...

I2C3 Recovery failed, I2C1 SDA still low!!!

Net:   got MAC address from IIM: 00:00:00:00:00:00

FEC0 [PRIME]

Hit any key to stop autoboot:  3  2  1  0

mmc2 is current device

MMC read: dev # 2, block # 2048, count 8448 ... 8448 blocks read: OK

## Booting kernel from Legacy Image at 10800000 ...

   Image Name:   Linux-3.0.35-2310-gc27cb38

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    3836924 Bytes =  3.7 MB

   Load Address: 10008000

   Entry Point:  10008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK

OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 3.0.35-2310-gc27cb38 (lucid@ubuntu) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #134 SMP PREEMPT Fri Sep 27 13:12:45 CST 2013
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board
Ignoring unrecognised tag 0x54410008
Memory policy: ECC disabled, Data cache writealloc
CPU identified as i.MX6Q, silicon rev 1.2
PERCPU: Embedded 7 pages/cpu @8c008000 s5440 r8192 d15040 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 227328
Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk1p1 rootwait rw video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
Memory: 640MB 256MB = 896MB total
Memory: 896888k/896888k available, 151688k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xf4600000 - 0xffe00000   ( 184 MB)
    vmalloc : 0xc0800000 - 0xf2000000   ( 792 MB)
    lowmem  : 0x80000000 - 0xc0000000   (1024 MB)
    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)
    modules : 0x7f000000 - 0x7fe00000   (  14 MB)
      .init : 0x80008000 - 0x8003b000   ( 204 kB)
      .text : 0x8003b000 - 0x80a8497c   (10535 kB)
      .data : 0x80a86000 - 0x80ae5ec0   ( 384 kB)
       .bss : 0x80ae5ee4 - 0x80b34170   ( 313 kB)
SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Preemptible hierarchical RCU implementation.
NR_IRQS:496
MXC GPIO hardware
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
arm_max_freq=2
MXC_Early serial console at MMIO 0x2020000 (options '115200')
bootconsole [ttymxc0] enabled
Console: colour dummy device 80x30
Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available
CPU1: Booted secondary processor
CPU2: Booted secondary processor
CPU3: Booted secondary processor
Brought up 4 CPUs
SMP: Total of 4 processors activated (6324.22 BogoMIPS).
devtmpfs: initialized
print_constraints: dummy:
NET: Registered protocol family 16
print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal
print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal
print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal
print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal
print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal
print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal
hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.
hw-breakpoint: maximum watchpoint size is 4 bytes.
L310 cache controller enabled
l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B
bio: create slab <bio-0> at 0
mxs-dma mxs-dma-apbh: initialized
print_constraints: SPKVDD: 4200 mV
print_constraints: vmmc: 3300 mV
SCSI subsystem initialized
spi_imx imx6q-ecspi.0: probed
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Freescale USB OTG Driver loaded, $Revision: 1.55 $
mc_pfuze 1-0008: recv failed!:-5,80
mc_pfuze: probe of 1-0008 failed with error -1
imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed
mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a
MIPI CSI2 driver module loaded
Advanced Linux Sound Architecture Driver Version 1.0.24.
Bluetooth: Core ver 2.16
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
cfg80211: Calling CRDA to update world regulatory domain
max17135 2-0048: PMIC MAX17135 for eInk display
i2c-core: driver [max17135] using legacy suspend method
i2c-core: driver [max17135] using legacy resume method
Switching to clocksource mxc_timer1
NET: Registered protocol family 2
IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
TCP: Hash tables configured (established 131072 bind 65536)
TCP reno registered
UDP hash table entries: 512 (order: 2, 16384 bytes)
UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
PMU: registered new PMU device of type 0
Static Power Management for Freescale i.MX6
wait mode is enabled for i.MX6
cpaddr = c0880000 suspend_iram_base=c091c000
PM driver module loaded
IMX usb wakeup probe
add wake up source irq 75
cpu regulator init ldo=0
i.MXC CPU frequency driver
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 1751
alg: No test for stdrng (krng)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
mxc_mipi_dsi mxc_mipi_dsi: i.MX MIPI DSI driver probed
MIPI DSI driver module loaded
mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver hdmi
mxc_hdmi mxc_hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1
fbcvt: 1920x1080@60: CVT Name - 2.073M9
imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)
Console: switching to colour frame buffer device 240x67
mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb
_regulator_get: get() with no identifier
mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd
mxc_sdc_fb mxc_sdc_fb.2: ipu0-di0 already in use
mxc_sdc_fb: probe of mxc_sdc_fb.2 failed with error -16
mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb
imx-sdma imx-sdma: loaded firmware 1.1
imx-sdma imx-sdma: initialized
Serial: IMX driver
imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX
imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX
console [ttymxc0] enabled, bootconsole disabled
console [ttymxc0] enabled, bootconsole disabled
[drm] Initialized drm 1.1.0 20060810
[drm] Initialized vivante 1.0.0 20120216 on minor 0
loop: module loaded
Can't recover from RESET HBA!
No sata disk.
m25p80 spi0.0: unrecognized JEDEC id ffffff
GPMI NAND driver registered. (IMX)
vcan: Virtual CAN interface driver
CAN device driver interface
flexcan netdevice driver
FEC Ethernet Driver
fec_enet_mii_bus: probed
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
ARC USBOTG Device Controller driver (1 August 2005)
mousedev: PS/2 mouse device common for all mice
input: gpio-keys as /devices/platform/gpio-keys/input/input0
input: max11801_ts as /devices/platform/imx-i2c.1/i2c-1/1-0048/input/input1
egalax_ts 1-0004: egalax_ts: failed to read firmware version
egalax_ts: probe of 1-0004 failed with error -5
egalax_ts 2-0004: egalax_ts: failed to read firmware version
egalax_ts: probe of 2-0004 failed with error -5
elan - Read Hello Packet Failed
elan-touch: probe of 2-0010 failed with error -22
i2c-core: driver [isl29023] using legacy suspend method
i2c-core: driver [isl29023] using legacy resume method
snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0
i2c /dev entries driver
Linux video capture interface: v2.00
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video18
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video19
mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video20
mag3110 2-000e: check mag3110 chip ID
mag3110 2-000e: read chip ID 0xffffff92 is not equal to 0xc4!
mag3110: probe of 2-000e failed with error -22
i2c-core: driver [mag3110] using legacy suspend method
i2c-core: driver [mag3110] using legacy resume method
mma8451 0-001c: read chip ID 0x1 is not equal to 0x1a or 0x2a!
mma8451: probe of 0-001c failed with error -22
imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1)
Bluetooth: Virtual HCI driver ver 1.3
Bluetooth: HCI UART driver ver 2.2
Bluetooth: HCIATH3K protocol initialized
Bluetooth: Generic Bluetooth USB driver ver 0.6
usbcore: registered new interface driver btusb
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA
mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA
mmc2: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA
mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed
VPU initialized
mxc_asrc registered
Thermal calibration data is 0x55f4bd7d
Anatop Thermal registered as thermal_zone0
anatop_thermal_probe: default cooling device is cpufreq!
HDMI CEC initialized
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
usbcore: registered new interface driver snd-usb-audio
mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio
Cirrus Logic CS42888 ALSA SoC Codec Driver
i2c-core: driver [cs42888] using legacy suspend method
i2c-core: driver [cs42888] using legacy resume method
wm8962 0-001a: Failed to get supply 'DCVDD': -19
wm8962 0-001a: Failed to request supplies: -19
mmc0: new high speed DDR MMC card at address 0001
wm8962 0-001a: asoc: failed to probe CODEC wm8962.0-001a: -19
asoc: failed to instantiate card wm8962-audio: -19
mmcblk0: mmc0:0001 004G90 3.68 GiB
mmcblk0boot0: mmc0:0001 004G90 partition 1 2.00 MiB
mmcblk0boot1: mmc0:0001 004G90 partition 2 2.00 MiB
imx_3stack asoc driver
mmcblk0: unknown partition table
asoc: mxc-hdmi-soc <-> imx-hdmi-soc-dai.0 mapping ok
mmcblk0boot1: unknown partition table
ALSA device list:
mmcblk0boot0: unknown partition table
  #0: imx-hdmi-soc
NET: Registered protocol family 26
TCP cubic registered
NET: Registered protocol family 17
can: controller area network core (rev 20090105 abi 8)
NET: Registered protocol family 29
can: raw protocol (rev 20090105)
can: broadcast manager protocol (rev 20090105 t)
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: HIDP (Human Interface Emulation) ver 1.2
lib80211: common routines for IEEE802.11 drivers
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
Bus freq driver module loaded
Bus freq driver Enabled
mxc_dvfs_core_probe
DVFS driver module loaded
regulator_init_complete: SPKVDD: incomplete constraints, leaving on
snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:00:00 UTC (0)
Waiting for root device /dev/mmcblk1p1...

I don't know where the problem ,does anybody happen to met this problem before ,please help me !

[PaulDeMetrotion]

I am not using a SABRE SD device but a custom board.

After digging deeper, it appears that when the blk_lookup_devt function is run, there are no entires to match with the mmcblk0p1 I specified. Is there some function within the customized board file that specifies the available block drives?

[lily_zhang]

Suggest that you check card detection signal. Your log doesn't show SD card is detected.

For example, cd_gpio function.

static const struct esdhc_platform_data mx6q_sabresd_sd2_data __initconst = {

        .cd_gpio = SABRESD_SD2_CD,

        .wp_gpio = SABRESD_SD2_WP,

        .keep_power_at_suspend = 1,

        .support_8bit = 1,

        .delay_line = 0,

        .cd_type = ESDHC_CD_CONTROLLER,

        .runtime_pm = 1,

};

[OtavioSalvador]

Well it might be many things; first confirm that the boot loader can see your MMC device properly.

I'd port your board to the U-Boot 2013.01 as it has a very good support for the SoC and has some neat and useful features.

Without digging deeper and with the board for testing, it is difficult to guess what might be wrong. It all depends on which changes your custom board has when compared to the supported board.

[LeonardoSandova]

Paul,

could you please try 'root=/dev/mmcblk1p1' and place your SD on SD3?

have you set the u-boot params according to the document 'SABRE_SD_User_Guide_L3.0.35_1.1.0.pdf' chapter 9?

[PaulDeMetrotion]

Found that I had commented out the platform_device_register function for the vmmc devices. Now my boot log is much cleaner but I still do not get any further. Any idea why the mmc is defaulting to DMA mode?

sdhci: Secure Digital Host Controller Interface driver

sdhci: Copyright(c) Pierre Ossman

sdhci sdhci-esdhc-imx.1: no write-protect pin available!

mmc0: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA

sdhci sdhci-esdhc-imx.2: no write-protect pin available!

sdhci sdhci-esdhc-imx.2: no card-detect pin available!

mmc1: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA

[OtavioSalvador]

Does your platform really lack write protect pin? it might be an indication of wrong MUX setup.

[PaulDeMetrotion]

The mmc does have power. Both the u-boot and uImage bianries are on this device and execute properly.

I do see the "mmc0: no vmmc regulator found" message you referenced. I do not know why it is displayed. The device mmc0 is connected to a micro-SD socket with 3.3V permenantly connected. There is no regulator.

[OtavioSalvador]

It seems to be a problem in your board config in the U-Boot; the mmc has no power (as said in the boot log)