Enabling Auto-Focus in ov5645 used in imx6

[parveenkumaryad]

Hi all,

I am working on a custom board based on imx6qd-sabresd.  I am using omnivision ov5645 camera over mipi interface for capturing video and live streaming. I have made the driver for the camera refering to the reference driver of ov5642 over mipi interface and by that i was successfully able to capture video from the camera and stream over wifi.

But i am facing some issue that are mentioned below:

1- When i tried to make the Auto Focus enable in the camera for which a firmware has to be downloaded, the kernel got crashed whenever it request for the firmware.(logs attched below)

2- While playing live video over LCD or HDMI using Gstreamer commands I am having some green patches at the corners of the screen and the video is also not of good quality as expected by ov5645 sensor.

3-While Streaming over wifi their were lot of lag in the video.

Auto Focus Crash:

ov5645_af_init auto focus intialization

ov5645_af_init download firmware

ov5645_af_init else download firmware

load_firmware loading firmware

_request_firmware requesting firmware to download

Unable to handle kernel NULL pointer dereference at virtual address 00000044

pgd = a8744000

[00000044] *pgd=387f9831, *pte=00000000, *ppte=00000000

Internal error: Oops: 17 [#1] PREEMPT SMP ARM

Modules linked in: cfg80211(O) wlcore_sdio(O) compat(O)

CPU: 0 PID: 444 Comm: v4l_id Tainted: G           O 3.10.17-1.0.0_ga+g232293e #15

task: a881c3c0 ti: a8b72000 task.ti: a8b72000

PC is at kobject_get+0x14/0x6c

LR is at device_add+0xbc/0x5b8

pc : [<8026a8a8>]    lr : [<8030129c>]    psr: 200f0013

sp : a8b73b78  ip : 00000000  fp : 80b6c80c

r10: 80b8a338  r9 : a8b73c50  r8 : a89be638

r7 : a89be600  r6 : a89be638  r5 : 00000000  r4 : 00000028

r3 : 00000044  r2 : 00000000  r1 : 80300250  r0 : 00000028

Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user

Control: 10c53c7d  Table: 3874404a  DAC: 00000015

Process v4l_id (pid: 444, stack limit = 0xa8b72238)

Stack: (0xa8b73b78 to 0xa8b74000)

3b60:                                                       a8ac0240 a89be640

3b80: 00000000 8030129c a8b73c50 80b8a338 80b6c80c 8026acb8 a8b73bc0 80aa4c80

3ba0: 805b83a4 a8577200 805b83a4 a8ac01c0 a89be600 a89be638 a8b73c50 80b8a338

3bc0: 80b6c80c 80310b10 a857723c a815cc10 80c002c8 00000000 80bfdee8 a8577200

3be0: 00000020 00001770 a857723c 00000001 80aa4c80 80bf0458 a8b73c50 a81a2c00

3c00: 000000ff 805c4634 00000020 a8ac0180 a8b73c50 00000001 80c002c8 80310e18

3c20: 00000000 805c4894 a8b73ba8 803deb98 a875fa80 8057661c 8001b7dc 00000000

3c40: a875fa80 80576864 f42c4074 1c01d25c a8025c80 60000013 00000001 00000000

3c60: a875fa80 80576864 00000001 8045622c 00000001 a81a2c00 a8025c80 80b95034

3c80: a801af00 00000000 00000280 a8460008 a8445800 80c002c8 a875fa80 803c5d10

3ca0: a8460000 803d6220 80080001 59565955 00000001 016e3600 000200da 80080001

3cc0: 59565955 00000001 016e3600 00000000 00000002 00000000 005b8d80 016e3600

3ce0: 016e3600 00000001 00000280 000001e0 59565955 00000000 00000000 00000000

3d00: 00000000 00000000 00000003 000000c1 80ba7880 00000002 ffffffff 00000000

3d20: 00000000 00000000 80ba8cc7 80ba7880 a87616a4 80b6c5c0 00000008 000200da

3d40: 00000000 00000003 00000000 00000002 80ba8980 8008f210 00000003 000000c1

3d60: 00000032 800882d8 00000000 a610d908 000000c0 a875ff00 a610d9dc 8008a5e8

3d80: 80ba7880 00000041 80ba7880 00000000 a89c88c0 00000001 800c22c8 a844b800

3da0: 00000000 800c22a8 800c22c8 a844b840 a800d400 a8445800 803d5f30 a875fa80

3dc0: a8445858 00000000 00000024 00000000 00000000 803b8d10 803b8c64 80bf578c

3de0: a844b800 a8443288 a875fa80 800c2628 a875fa80 00000000 a875fa80 a8443288

3e00: 00020000 a875fa88 800c2598 800bce2c 00000000 a8b73ebc a8b73f78 00020000

3e20: 00000000 a8b73ec0 00000024 800bcf40 a8b73f00 800ca768 a8b72000 800c87ac

3e40: 00000028 a8745db8 a89c8900 a8b72000 a875fa80 00000000 a6026000 00000000

3e60: 00000000 00000000 9087e695 00000006 a8649015 a8443288 a88b6b80 a875fa80

3e80: a8b73f00 a8b73f78 a8b73ec0 ffffff9c a8b72000 a8b72000 00000000 800cb070

3ea0: a8b73ebc 00000000 811207a0 8008e168 80c0f000 811207a0 00000000 00000000

3ec0: a84a06d0 a6005198 00000000 8008fa4c 00000000 a8b73f78 00000001 a8649000

3ee0: ffffff9c ffffff9c a8b72000 00000000 00000000 800cc03c 00000041 a8b73fb0

3f00: a84a06d0 a6005198 9087e695 00000006 a8649015 800c94d8 00000000 a60d3b28

3f20: a8443288 00000101 00000004 00000000 00000000 8057681c 00020000 800d747c

3f40: 80bf0458 00020000 00000001 00020000 a8649000 000085f0 00000001 00020000

3f60: a8649000 00000003 00000001 800bdeac 7ef66b44 80040464 00020000 00030000

3f80: 00000024 00000100 8000e204 7ef66f3e 7ef66e54 000085f0 00000005 8000e204

3fa0: a8b72000 8000e080 7ef66f3e 7ef66e54 7ef66f3e 00020000 00000000 00000000

3fc0: 7ef66f3e 7ef66e54 000085f0 00000005 00000000 00000000 76fb2000 00000000

3fe0: 76f136d4 7ef66c58 000084cc 76f13718 600f0010 7ef66f3e 00000000 00000000

[<8026a8a8>] (kobject_get+0x14/0x6c) from [<8030129c>] (device_add+0xbc/0x5b8)

[<8030129c>] (device_add+0xbc/0x5b8) from [<80310b10>] (_request_firmware+0x518/0x808)

[<80310b10>] (_request_firmware+0x518/0x808) from [<80310e18>] (request_firmware+0x18/0x20)

[<80310e18>] (request_firmware+0x18/0x20) from [<803deb98>] (ov5645_init_mode+0x7e0/0x9ec)

[<803deb98>] (ov5645_init_mode+0x7e0/0x9ec) from [<803c5d10>] (v4l2_int_ioctl_0+0x30/0x34)

[<803c5d10>] (v4l2_int_ioctl_0+0x30/0x34) from [<803d6220>] (mxc_v4l_open+0x2f0/0x394)

[<803d6220>] (mxc_v4l_open+0x2f0/0x394) from [<803b8d10>] (v4l2_open+0xac/0xe8)

[<803b8d10>] (v4l2_open+0xac/0xe8) from [<800c2628>] (chrdev_open+0x90/0x174)

[<800c2628>] (chrdev_open+0x90/0x174) from [<800bce2c>] (do_dentry_open.isra.16+0x164/0x258)

[<800bce2c>] (do_dentry_open.isra.16+0x164/0x258) from [<800bcf40>] (finish_open+0x20/0x38)

[<800bcf40>] (finish_open+0x20/0x38) from [<800ca768>] (do_last.isra.54+0x3b8/0xc14)

[<800ca768>] (do_last.isra.54+0x3b8/0xc14) from [<800cb070>] (path_openat.isra.55+0xac/0x470)

[<800cb070>] (path_openat.isra.55+0xac/0x470) from [<800cc03c>] (do_filp_open+0x2c/0x80)

[<800cc03c>] (do_filp_open+0x2c/0x80) from [<800bdeac>] (do_sys_open+0xe8/0x170)

[<800bdeac>] (do_sys_open+0xe8/0x170) from [<8000e080>] (ret_fast_syscall+0x0/0x30)

Code: e2504000 0a000009 e284301c f57ff05f (e1932f9f)

---[ end trace 8434ada4fb39d4e1 ]---

udevd[120]: 'v4l_id /dev/video1' [444] terminated by signal 11 (Segmentation fault)

[parveenkumaryad]

Hi Weidong Sun,

Sorry for late reply.

I was able to write the register setting for auto focus but still i am not able to enable the continuous auto-focus.

i am now able to change the focus o near and far by making some ioctl.

[Jerin]

Hi,

How did you resolve this issue "2- While playing live video over LCD or HDMI using Gstreamer commands I am having some green patches at the corners of the screen and the video is also not of good quality as expected by ov5645 sensor." ?

[weidong_sun]

Hello Parveen,

     OV5645 should be downloaded firmware through I2C interface, in order to confirm I2C communication, you can add code to dump values of some registers, or write a correct value to register , the read it out. Would you like to try ?

Regards,

Weidong