tiny caspa - anyone got it working on overo?

[caker137]

I am hoping someone has gotten the tiny caspa camera to work on a gumstix overo.  I can't seem to find documentation for o/s support of this camera.  I have tried fido and krogoth branches, of gumstix/yocto but nothing I've tried even detects the camera.

The only real clues I find are here:
https://github.com/adam-lee/ov7692-omap3/blob/master/README
which states that there was an experimental driver 18 months ago.  I was hoping the camera had gotten some mainstream support since feb 2016

I have been able to get the old caspa (MT9V032) camera to work just fine, but support for the tiny caspa (OV7692) is either undocumented or non-existent.  

I'm currently working with a overo ironstorm-Y and using the yocto image built with these instructions (and used menuconfig to add in the ov7692 driver):  https://github.com/gumstix/Gumstix-YoctoProject-Repo

Any help is greatly appreciated.  

[Gumstix mailing list]

It looks like the OV7692 driver has been removed from the morty branch.  Does
this mean the camera is no longer supported on gumstix?



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[caker137]

It looks like the OV7692 driver has been removed from the morty branch.  Does this mean the camera is no longer supported on gumstix?

[Gumstix mailing list]

Hi,

The OV7692 is supported and we will have support on Morty.  Our Morty
support is currently under development, we just haven't gotten to that
particular device yet.

As for the older branches, there is some support (camera doesn't work
perfectly though), I'm not sure why you're having problems.  We will look
into it.


Thanks,

Andrew



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[Andrew C. Smith]

Hi,

The OV7692 is supported and we will have support on Morty.  Our Morty support is currently under development, we just haven't gotten to that particular device yet.

As for the older branches, there is some support (camera doesn't work perfectly though), I'm not sure why you're having problems.  We will look into it.


Thanks,

Andrew

[Gumstix mailing list]

Thanks Andrew,


Andrew C. Smith wrote
> As for the older branches, there is some support (camera doesn't work
> perfectly though), I'm not sure why you're having problems.

With Krogoth, I have added the ov7692 driver as a module in menuconfig.
modprobe ov7692 loads the driver, but does nothing.  modprobe omap3-isp
looks for the MT9v032, which works with the old caspa camera, but fails out
if the new camera is attached instead.  

Should I be loading some other driver with modprobe to read the ov7692?






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[caker137]

Thanks Andrew,

Andrew C. Smith wrote

As for the older branches, there is some support (camera doesn't work perfectly though), I'm not sure why you're having problems.

With Krogoth, I have added the ov7692 driver as a module in menuconfig.  modprobe ov7692 loads the driver, but does nothing.  modprobe omap3-isp looks for the MT9v032, which works with the old caspa camera, but fails out if the new camera is attached instead.  

Should I be loading some other driver with modprobe to read the ov7692?

[Gumstix mailing list]

We should have an update on this shortly.  We're reorganizing our software
distribution, the tiny caspa driver will be confirmed once it's deployed.

Sorry about the delay.

Andrew



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[Andrew C. Smith]

We should have an update on this shortly.  We're reorganizing our software distribution, the tiny caspa driver will be confirmed once it's deployed.

Sorry about the delay.

Andrew

[Gumstix mailing list]

Hi Caker,

The tiny caspa camera now is supported on three branches: fido, krogoth and
morty. In order to use tiny caspa camera, you will need to modify the device
tree "omap3-overo-common-peripherals.dtsi" and add a line: "#define
CONFIG_OV7692" to activate it. The driver is included in our kernel but you
may need to do bitbake -c menuconfig virtual/kernel to enable it.

Thank you for your patience.
Jason



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[Jason]

Hi Caker,

The tiny caspa camera now is supported on three branches: fido, krogoth and morty. In order to use tiny caspa camera, you will need to modify the device tree "omap3-overo-common-peripherals.dtsi" and add a line: "#define CONFIG_OV7692" to activate it. The driver is included in our kernel but you may need to do bitbake -c menuconfig virtual/kernel to enable it.

Thank you for your patience.
Jason

[Gumstix mailing list]

I rebuilt our custom o/s image with the new tiny capsa changes from the fido
branch (42c2ff24ee360444f32ff36faa2dabc3518ccd3f), enabled the ov7692 driver
as a module in the kernel config, and I added the #define CONFIG_OV7692 to
the dtsi.  All built just fine.  Once booted, when I issue the command
'modprobe omap3-isp"  I get a seg fault error:

[  137.043121] omap3isp 480bc000.omap3_isp: interface 0
[  137.048645] omap3isp 480bc000.omap3_isp: interface 0
[  137.053894] Unable to handle kernel NULL pointer dereference at virtual
address 00000000
[  137.062408] pgd = dd390000
[  137.065216] [00000000] *pgd=9e035831, *pte=00000000, *ppte=00000000
[  137.071807] Internal error: Oops: 17 [#1] SMP ARM
[  137.076721] Modules linked in: omap3_isp(+) videobuf2_dma_contig
videobuf2_memops videobuf2_core ipv6 usb_f_acm u_serial usb_f_ecm g_cdc
u_ether libcomposite snd_soc_omap_twl4030 libertas_sdio snd_soc_omap_mcbsp
snd_soc_omap libertas snd_pcm_dmaengine cfg80211 rfkill snd_soc_twl4030
snd_soc_core snd_compress twl4030_madc industrialio ov7692 mt9v032
v4l2_common videodev media
[  137.111541] CPU: 0 PID: 1238 Comm: modprobe Not tainted 3.18.21-custom #1
[  137.118621] task: de372ec0 ti: de4c6000 task.ti: de4c6000
[  137.124359] PC is at v4l2_async_notifier_register+0x6c/0x14c [videodev]
[  137.131286] LR is at isp_probe+0x2b8/0xe28 [omap3_isp]
[  137.136657] pc : [<bf02203c>]    lr : [<bf25b8b4>]    psr: 80010013
[  137.136657] sp : de4c7d08  ip : de7a00d8  fp : bf26e0f0
[  137.148590] r10: dd1521c8  r9 : de1a0000  r8 : de1a0010
[  137.154052] r7 : fffffdfb  r6 : 00000000  r5 : 00000002  r4 : de7a00cc
[  137.160858] r3 : 00000000  r2 : de7a00d8  r1 : 00000002  r0 : 0000000c
[  137.167663] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment
user
[  137.175079] Control: 10c5387d  Table: 9d390019  DAC: 00000015
[  137.181060] Process modprobe (pid: 1238, stack limit = 0xde4c6240)
[  137.187499] Stack: (0xde4c7d08 to 0xde4c8000)
[  137.192047] 7d00:                   de7a0010 00000002 00000000 fffffdfb
de1a0010 bf25b8b4
[  137.200592] 7d20: c07ebb6c c00832ec c0949c10 60010013 dd248510 c114083c
c07ebb6c c05e6944
[  137.209106] 7d40: 00000002 00000000 dd374b70 00000000 00000000 dfab226c
00000001 00000001
[  137.217620] 7d60: 0000000c 00000000 00000000 00000000 de1a23f0 c07ebb6c
dd374b70 c118859c
[  137.226165] 7d80: de1a0010 bf26c1b4 fffffdfb c08f41a0 0000002d dd1521c8
bf26e0f0 c03c2290
[  137.234680] 7da0: c03c224c c118859c de1a0010 00000000 bf26c1b4 c03c09ac
00000000 de1a0010
[  137.243194] 7dc0: bf26c1b4 de1a0044 c09614b0 c08f41a0 dd0793c0 c03c0bbc
00000000 bf26c1b4
[  137.251708] 7de0: c03c0b28 c03bef44 de044ca8 de194390 bf26c1b4 de20cb40
00000000 c03c01d0
[  137.260253] 7e00: bf26af10 bf26c1b4 de4c6030 bf26c1b4 de4c6030 bf275000
00000000 c03c1314
[  137.268768] 7e20: 00000000 c08f41a0 de4c6030 c00089c4 c08f4084 dfe91120
dfaf1000 00000000
[  137.277313] 7e40: 00000021 c00835c0 c08e96c0 c098a5c0 20010013 00000021
de4c7f58 c00835c0
[  137.285827] 7e60: 1f191000 a0010013 dfa7b2ec de4c7f58 c08ea4dc dd0793c0
1f191000 a0010013
[  137.294342] 7e80: dfa7b4dc de4c7f58 c098ddd4 bf26e0fc dd1521c0 00000001
bf26e138 dd1521c8
[  137.302886] 7ea0: bf26e0f0 c00b8a18 bf26e0fc 00007fff c00b5cb4 00000000
00000000 00000000
[  137.311401] 7ec0: de4c7f58 de4c6028 c00b5dd0 bf26e0fc 00000000 de4c7f60
0000039d de4c7f8c
[  137.319915] 7ee0: 00015954 00000000 0b300002 000081a4 00000001 00000000
00000000 00000000
[  137.328460] 7f00: 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000
[  137.336975] 7f20: 00000000 00000000 00000000 00000000 00000000 00000000
00000006 00020ee4
[  137.345489] 7f40: 0000017b c000e824 de4c6000 00000000 00000000 c00b9288
e0b3e000 0002092c
[  137.354034] 7f60: e0b549cc e0b54878 e0b588ec 00014324 00017184 00000000
00000000 00000000
[  137.362548] 7f80: 00000020 00000021 00000016 0000001a 0000000f 00000000
00000000 0002bfb8
[  137.371063] 7fa0: 00000000 c000e660 00000000 0002bfb8 00000006 00020ee4
00000000 00040000
[  137.379608] 7fc0: 00000000 0002bfb8 00000000 0000017b 00000000 0002bfb8
0002bec8 00000000
[  137.388122] 7fe0: bebc6a00 bebc69f0 00016f84 b6f1c370 60010010 00000006
19500428 0e29d002
[  137.396759] [<bf02203c>] (v4l2_async_notifier_register [videodev]) from
[<bf25b8b4>] (isp_probe+0x2b8/0xe28 [omap3_isp])
[  137.408111] [<bf25b8b4>] (isp_probe [omap3_isp]) from [<c03c2290>]
(platform_drv_probe+0x44/0xa4)
[  137.417388] [<c03c2290>] (platform_drv_probe) from [<c03c09ac>]
(driver_probe_device+0x104/0x23c)
[  137.426635] [<c03c09ac>] (driver_probe_device) from [<c03c0bbc>]
(__driver_attach+0x94/0x98)
[  137.435424] [<c03c0bbc>] (__driver_attach) from [<c03bef44>]
(bus_for_each_dev+0x6c/0xa0)
[  137.443969] [<c03bef44>] (bus_for_each_dev) from [<c03c01d0>]
(bus_add_driver+0x144/0x1f0)
[  137.452575] [<c03c01d0>] (bus_add_driver) from [<c03c1314>]
(driver_register+0x78/0xf8)
[  137.460937] [<c03c1314>] (driver_register) from [<c00089c4>]
(do_one_initcall+0x80/0x1c8)
[  137.469451] [<c00089c4>] (do_one_initcall) from [<c00b8a18>]
(load_module+0x1998/0x20b4)
[  137.477905] [<c00b8a18>] (load_module) from [<c00b9288>]
(SyS_finit_module+0x68/0x78)
[  137.486053] [<c00b9288>] (SyS_finit_module) from [<c000e660>]
(ret_fast_syscall+0x0/0x50)
[  137.494598] Code: e5943004 e7933101 e2811001 e283000c (e5932000)
[  137.501068] ---[ end trace a964c68298b0122f ]---
Segmentation fault


Any Ideas?  lsmod shows this after the modprobe failure:

Module                  Size  Used by
omap3_isp             104031  1
videobuf2_dma_contig     9122  1 omap3_isp
videobuf2_memops        2139  1 videobuf2_dma_contig
videobuf2_core         39571  1 omap3_isp
ipv6                  368311  22
usb_f_acm               5421  1
u_serial               10195  1 usb_f_acm
usb_f_ecm               6956  1
g_cdc                   2874  0
u_ether                13058  2 g_cdc,usb_f_ecm
libcomposite           44779  3 g_cdc,usb_f_acm,usb_f_ecm
snd_soc_omap_twl4030     6877  0
libertas_sdio          17100  0
snd_soc_omap_mcbsp     18045  2
snd_soc_omap            2783  1 snd_soc_omap_mcbsp
libertas              105968  1 libertas_sdio
snd_pcm_dmaengine       5427  1 snd_soc_omap
cfg80211              412904  1 libertas
rfkill                 19588  1 cfg80211
snd_soc_twl4030        39531  1
snd_soc_core          162579  4
snd_soc_omap_twl4030,snd_soc_omap,snd_soc_omap_mcbsp,snd_soc_twl4030
snd_compress            8664  1 snd_soc_core
twl4030_madc            9173  0
industrialio           27164  1 twl4030_madc
ov7692                  8673  0
mt9v032                10684  0
v4l2_common             7703  4 omap3_isp,mt9v032,ov7692,videobuf2_core
videodev              145102  5
omap3_isp,mt9v032,v4l2_common,ov7692,videobuf2_core
media                  14864  4 omap3_isp,mt9v032,ov7692,videodev


Any help appreciated!  Thanks.



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[caker137]

I rebuilt our custom o/s image with the new tiny capsa changes from the fido branch (42c2ff24ee360444f32ff36faa2dabc3518ccd3f), enabled the ov7692 driver as a module in the kernel config, and I added the #define CONFIG_OV7692 to the dtsi.  All built just fine.  Once booted, when I issue the command 'modprobe omap3-isp"  I get a seg fault error:

[  137.043121] omap3isp 480bc000.omap3_isp: interface 0
[  137.048645] omap3isp 480bc000.omap3_isp: interface 0
[  137.053894] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[  137.062408] pgd = dd390000
[  137.065216] [00000000] *pgd=9e035831, *pte=00000000, *ppte=00000000
[  137.071807] Internal error: Oops: 17 [#1] SMP ARM
[  137.076721] Modules linked in: omap3_isp(+) videobuf2_dma_contig videobuf2_memops videobuf2_core ipv6 usb_f_acm u_serial usb_f_ecm g_cdc u_ether libcomposite snd_soc_omap_twl4030 libertas_sdio snd_soc_omap_mcbsp snd_soc_omap libertas snd_pcm_dmaengine cfg80211 rfkill snd_soc_twl4030 snd_soc_core snd_compress twl4030_madc industrialio ov7692 mt9v032 v4l2_common videodev media
[  137.111541] CPU: 0 PID: 1238 Comm: modprobe Not tainted 3.18.21-custom #1
[  137.118621] task: de372ec0 ti: de4c6000 task.ti: de4c6000
[  137.124359] PC is at v4l2_async_notifier_register+0x6c/0x14c [videodev]
[  137.131286] LR is at isp_probe+0x2b8/0xe28 [omap3_isp]
[  137.136657] pc : [<bf02203c>]    lr : [<bf25b8b4>]    psr: 80010013
[  137.136657] sp : de4c7d08  ip : de7a00d8  fp : bf26e0f0
[  137.148590] r10: dd1521c8  r9 : de1a0000  r8 : de1a0010
[  137.154052] r7 : fffffdfb  r6 : 00000000  r5 : 00000002  r4 : de7a00cc
[  137.160858] r3 : 00000000  r2 : de7a00d8  r1 : 00000002  r0 : 0000000c
[  137.167663] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[  137.175079] Control: 10c5387d  Table: 9d390019  DAC: 00000015
[  137.181060] Process modprobe (pid: 1238, stack limit = 0xde4c6240)
[  137.187499] Stack: (0xde4c7d08 to 0xde4c8000)
[  137.192047] 7d00:                   de7a0010 00000002 00000000 fffffdfb de1a0010 bf25b8b4
[  137.200592] 7d20: c07ebb6c c00832ec c0949c10 60010013 dd248510 c114083c c07ebb6c c05e6944
[  137.209106] 7d40: 00000002 00000000 dd374b70 00000000 00000000 dfab226c 00000001 00000001
[  137.217620] 7d60: 0000000c 00000000 00000000 00000000 de1a23f0 c07ebb6c dd374b70 c118859c
[  137.226165] 7d80: de1a0010 bf26c1b4 fffffdfb c08f41a0 0000002d dd1521c8 bf26e0f0 c03c2290
[  137.234680] 7da0: c03c224c c118859c de1a0010 00000000 bf26c1b4 c03c09ac 00000000 de1a0010
[  137.243194] 7dc0: bf26c1b4 de1a0044 c09614b0 c08f41a0 dd0793c0 c03c0bbc 00000000 bf26c1b4
[  137.251708] 7de0: c03c0b28 c03bef44 de044ca8 de194390 bf26c1b4 de20cb40 00000000 c03c01d0
[  137.260253] 7e00: bf26af10 bf26c1b4 de4c6030 bf26c1b4 de4c6030 bf275000 00000000 c03c1314
[  137.268768] 7e20: 00000000 c08f41a0 de4c6030 c00089c4 c08f4084 dfe91120 dfaf1000 00000000
[  137.277313] 7e40: 00000021 c00835c0 c08e96c0 c098a5c0 20010013 00000021 de4c7f58 c00835c0
[  137.285827] 7e60: 1f191000 a0010013 dfa7b2ec de4c7f58 c08ea4dc dd0793c0 1f191000 a0010013
[  137.294342] 7e80: dfa7b4dc de4c7f58 c098ddd4 bf26e0fc dd1521c0 00000001 bf26e138 dd1521c8
[  137.302886] 7ea0: bf26e0f0 c00b8a18 bf26e0fc 00007fff c00b5cb4 00000000 00000000 00000000
[  137.311401] 7ec0: de4c7f58 de4c6028 c00b5dd0 bf26e0fc 00000000 de4c7f60 0000039d de4c7f8c
[  137.319915] 7ee0: 00015954 00000000 0b300002 000081a4 00000001 00000000 00000000 00000000
[  137.328460] 7f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  137.336975] 7f20: 00000000 00000000 00000000 00000000 00000000 00000000 00000006 00020ee4
[  137.345489] 7f40: 0000017b c000e824 de4c6000 00000000 00000000 c00b9288 e0b3e000 0002092c
[  137.354034] 7f60: e0b549cc e0b54878 e0b588ec 00014324 00017184 00000000 00000000 00000000
[  137.362548] 7f80: 00000020 00000021 00000016 0000001a 0000000f 00000000 00000000 0002bfb8
[  137.371063] 7fa0: 00000000 c000e660 00000000 0002bfb8 00000006 00020ee4 00000000 00040000
[  137.379608] 7fc0: 00000000 0002bfb8 00000000 0000017b 00000000 0002bfb8 0002bec8 00000000
[  137.388122] 7fe0: bebc6a00 bebc69f0 00016f84 b6f1c370 60010010 00000006 19500428 0e29d002
[  137.396759] [<bf02203c>] (v4l2_async_notifier_register [videodev]) from [<bf25b8b4>] (isp_probe+0x2b8/0xe28 [omap3_isp])
[  137.408111] [<bf25b8b4>] (isp_probe [omap3_isp]) from [<c03c2290>] (platform_drv_probe+0x44/0xa4)
[  137.417388] [<c03c2290>] (platform_drv_probe) from [<c03c09ac>] (driver_probe_device+0x104/0x23c)
[  137.426635] [<c03c09ac>] (driver_probe_device) from [<c03c0bbc>] (__driver_attach+0x94/0x98)
[  137.435424] [<c03c0bbc>] (__driver_attach) from [<c03bef44>] (bus_for_each_dev+0x6c/0xa0)
[  137.443969] [<c03bef44>] (bus_for_each_dev) from [<c03c01d0>] (bus_add_driver+0x144/0x1f0)
[  137.452575] [<c03c01d0>] (bus_add_driver) from [<c03c1314>] (driver_register+0x78/0xf8)
[  137.460937] [<c03c1314>] (driver_register) from [<c00089c4>] (do_one_initcall+0x80/0x1c8)
[  137.469451] [<c00089c4>] (do_one_initcall) from [<c00b8a18>] (load_module+0x1998/0x20b4)
[  137.477905] [<c00b8a18>] (load_module) from [<c00b9288>] (SyS_finit_module+0x68/0x78)
[  137.486053] [<c00b9288>] (SyS_finit_module) from [<c000e660>] (ret_fast_syscall+0x0/0x50)
[  137.494598] Code: e5943004 e7933101 e2811001 e283000c (e5932000)
[  137.501068] ---[ end trace a964c68298b0122f ]---
Segmentation fault


Any Ideas?  lsmod shows this after the modprobe failure:

Module                  Size  Used by
omap3_isp             104031  1
videobuf2_dma_contig     9122  1 omap3_isp
videobuf2_memops        2139  1 videobuf2_dma_contig
videobuf2_core         39571  1 omap3_isp
ipv6                  368311  22
usb_f_acm               5421  1
u_serial               10195  1 usb_f_acm
usb_f_ecm               6956  1
g_cdc                   2874  0
u_ether                13058  2 g_cdc,usb_f_ecm
libcomposite           44779  3 g_cdc,usb_f_acm,usb_f_ecm
snd_soc_omap_twl4030     6877  0
libertas_sdio          17100  0
snd_soc_omap_mcbsp     18045  2
snd_soc_omap            2783  1 snd_soc_omap_mcbsp
libertas              105968  1 libertas_sdio
snd_pcm_dmaengine       5427  1 snd_soc_omap
cfg80211              412904  1 libertas
rfkill                 19588  1 cfg80211
snd_soc_twl4030        39531  1
snd_soc_core          162579  4 snd_soc_omap_twl4030,snd_soc_omap,snd_soc_omap_mcbsp,snd_soc_twl4030
snd_compress            8664  1 snd_soc_core
twl4030_madc            9173  0
industrialio           27164  1 twl4030_madc
ov7692                  8673  0
mt9v032                10684  0
v4l2_common             7703  4 omap3_isp,mt9v032,ov7692,videobuf2_core
videodev              145102  5 omap3_isp,mt9v032,v4l2_common,ov7692,videobuf2_core
media                  14864  4 omap3_isp,mt9v032,ov7692,videodev


Any help appreciated!  Thanks.

[Jason]

Hi Caker,

I am sorry about the problem you have. I can definitely see the issue, the mt9v032 driver should not be involved if the the #define CONFIG_OV7692 was added.
I just built the image with the newest commit (42c2ff24ee360444f32ff36faa2dabc3518ccd3f) and I have the tiny caspa camera working just fine. What I am guessing is the device tree did not change or did not get compiled.

I want to confirm that after modified your device tree, it should look like this:omap3-overo-common-peripherals.dtsi

Once you change the device tree file, you need to run the command "bitbake -fc compile linux-gumstix" to compile the kernel again. Otherwise the device tree file won't get compiled. Then you can rebuild the image by running the command "bitbake gumstix-console-image"

Regards,

Jason

[caker137]

Jason,

Thanks for the hint.  I was able to find where our custom device tree file was adding the mt9v032 device.  Once removed all started to behave better.

I am still having one issue, which I believe is with color mapping.  I am getting images now, but the colors are all wrong and desaturated.  Blue and red are obviously swapped and some other things look bad.  Here is what I'm doing:

modprobe omap3-isp dyndbg=+pt
sleep 1
media-ctl -r -l '"OV7692":0->"OMAP3 ISP CCDC":0[1], "OMAP3 ISP CCDC":1->"OMAP3 ISP CCDC output":0[1]'
sleep 1
media-ctl -V '"OV7692":0[SBGGR8 640x480], "OMAP3 ISP CCDC":1[SBGGR8 640x480]'
sleep 1

yavta -p -c1 -n1 -s640x480 -fSBGGR8 -Fimage-#.raw /dev/video2'

(then back on my ubuntu box)

 ufraw image-000000.raw

Is there something I'm doing wrong?  Thanks again.

caker

[Jason]

Hello Caker,

Thank you for pointing out the problem, I can reproduce it. Known the camera driver is using SBGGR8 pixel format, what my guess is the actual format would be SRGGB8?fig-9a-ucs.gif

As for the desaturated issue, it is possible that tune it in the driver. However, tuning the camera sensor is much harder than adjusting the desaturation on software, this issue may not be easily fixed.

 I may need to spend some time on the driver and will post update here.

image-000000.jpg

Regards,

Jason