how to change the device name of tw6865 in the IMX6q?I want change the name "video16" to "video0"

[hubing1]

this is the boot log:

Linux version 3.0.35-2666-gbdde708 (hubing@hubing-desktop) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #3 SMP PREEMPT Thu Oct 15 18:45:06 CST 2015

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

On node 0 totalpages: 196608

free_area_init_node: node 0, pgdat 80b2d900, node_mem_map 8b800000

  DMA zone: 368 pages used for memmap

  DMA zone: 0 pages reserved

  DMA zone: 46736 pages, LIFO batch:15

  Normal zone: 1680 pages used for memmap

  Normal zone: 147824 pages, LIFO batch:31

PERCPU: Embedded 7 pages/cpu @8c008000 s5440 r8192 d15040 u32768

pcpu-alloc: s5440 r8192 d15040 u32768 alloc=8*4096

pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 194560

Kernel command line: console=ttymxc0,115200 ip=none root=/dev/mmcblk0p1 rootwait

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: 512MB 256MB = 768MB total

Memory: 765528k/765528k available, 283048k 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 - 0x8003d000   ( 212 kB)

      .text : 0x8003d000 - 0x80ac9ea0   (10804 kB)

      .data : 0x80aca000 - 0x80b2ea60   ( 403 kB)

       .bss : 0x80b2ea84 - 0x80b7cf4c   ( 314 kB)

SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1

Preemptible hierarchical RCU implementation.

NR_IRQS:624

MXC GPIO hardware

sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms

arm_max_freq=1GHz

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 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: 1_8V: 1800 mV

print_constraints: MICVDD: 3300 mV

print_constraints: vmmc: 3300 mV

vgaarb: loaded

SCSI subsystem initialized

libata version 3.00 loaded.

spi_imx imx6q-ecspi.0: probed

spi_imx imx6q-ecspi.1: 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 $

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_regulator_init abort: EPDC not enabled

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.

PCI: CLS 0 bytes, default 32

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=c0934000

PM driver module loaded

iMX6 PCIe PCIe RC mode imx_pcie_pltfm_probe entering.

PCIE: imx_pcie_pltfm_probe start link up.

link up failed, DB_R0:0x00427400, DB_R1:0x08200000!

IMX PCIe port: link down!

IMX usb wakeup probe

the wakeup pdata is 0xbfd29840

add wake up source irq 75

IMX usb wakeup probe

the wakeup pdata is 0xbfd291c0

cpu regulator mode:ldo_enable

i.MXC CPU frequency driver

JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.

msgmni has been set to 1495

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 ldb

_regulator_get: get() with no identifier

imx-ipuv3 imx-ipuv3.1: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7)

Console: switching to colour frame buffer device 128x37

mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb

mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd

mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb

mxc_sdc_fb mxc_sdc_fb.3: ipu1-di0 already in use

mxc_sdc_fb: probe of mxc_sdc_fb.3 failed with error -16

imx-sdma imx-sdma: loaded firmware 1.1

imx-sdma imx-sdma: initialized

Serial: IMX driver

imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX

console [ttymxc0] enabled, bootconsole disabled

imx-uart.1: ttymxc1 at MMIO 0x21e8000 (irq = 59) is a IMX

imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX

imx-uart.3: ttymxc3 at MMIO 0x21f0000 (irq = 61) is a IMX

imx-uart.4: ttymxc4 at MMIO 0x21f4000 (irq = 62) is a IMX

loop: module loaded

No sata disk.

m25p80 spi0.0: sst25vf016b (2048 Kbytes)

Creating 2 MTD partitions on "m25p80":

0x000000000000-0x000000100000 : "bootloader"

0x000000100000-0x000000200000 : "kernel"

GPMI NAND driver registered. (IMX)

vcan: Virtual CAN interface driver

CAN device driver interface

flexcan netdevice driver

flexcan imx6q-flexcan.0: device registered (reg_base=c09f0000, irq=142)

flexcan imx6q-flexcan.1: device registered (reg_base=c09f8000, irq=143)

FEC Ethernet Driver

fec_enet_mii_bus: probed

usbcore: registered new interface driver smsc95xx

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

input: gpio-keys as /devices/platform/gpio-keys/input/input0

usb 2-1: new high speed USB device number 2 using fsl-ehci

elan - Read Hello Packet Failed

elan-touch: probe of 2-0010 failed with error -22

====ft5x0x_ts_probe

[FST] Firmware version = 0x6

====client->irq===432

input: ft5x0x_ts as /devices/virtual/input/input1

i2c-core: driver [isl29023] using legacy suspend method

i2c-core: driver [isl29023] using legacy resume method

rtc-isl1208 0-006f: chip found, driver version 0.3

rtc-isl1208 0-006f: rtc core: registered rtc-isl1208 as rtc0

rtc-isl1208 0-006f: rtc power failure detected, please set clock.

snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc1

i2c /dev entries driver

Linux video capture interface: v2.00

TW6868_: v4l2 driver version 2.0.1 loaded

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

I want to know how to change "video16" to "video0"?

[igorpadykov]

Hi hu

for changing video number you should be able to specify the camera or video

device number to use as default when loading the mxc_v4l2_capture driver -

this should be done by the kernel module parameter 'video_nr':

  modprobe mxc_v4l2_capture video_nr=1

1.1. Opening and Closing Devices

Best regards

igor

[qiang_li-mpu_se]

From the log "IMX PCIe port: link down!", it means TW6865 card hasn't been found on your board.

There should be hardware issue, you can try with another board.

[hubing1]

you are right! the card didn't connect to the board.But this problem has been solved.when i remove the six 0Ω resisters,it works! And the video number start from 0 to 4,thank you !