Re: [meta-freescale] Wandboard WB-IMX6U-BW CAM-OV5645 camera

["Terry Barnaby" <terry@beam.ltd.uk>]

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Hi Fabio,

Many thanks for your reply. Notes below:

Terry
On 16/02/2021 20:55, Fabio Estevam wrote:
> Hi Terry,
>
> On Tue, Feb 16, 2021 at 5:39 AM Terry Barnaby <terry@beam.ltd.uk> wrote:
>> Hi,
>>
>> I am trying to get the CAM-OV5645 MIPI-CSI camera interface working on a
>> WB-IMX6U-BW board for a development experiment. However, I'm not having
>> much luck with many different Linux "distribution" installs and info on
>> the Wandboard WB-IMX6U-BW and CAM-OV5645 camera seems very hard to get
>> hold of. The camera also does not appear to work on a PICO-PI-IMX8-PRO
>> board. I get kernel messages like those listed at the bottom of this
>> email. I guess the camera module may be faulty, (it is new), or there
>> may have been hardware changes. The kernel is not seeing the OV5645 on
>> the I2C-2 bus although the ov5645 kernel driver module is loaded. This
>> is just a check to see if anyone can shed any light on this ?
>>
>> Also the WB-IMX6U-BW board is a revD1 board. However I note that the
>> current freescale.github.io Yocto build appears to consider it a revB1
> Which U-Boot version is this?
>
> Can you try U-Boot 2021.01?

It was "U-Boot 2020.04+fslc+g88c58453be (Oct 13 2020 - 21:59:38 +0000)". 
This is what was built using the instructions at: 
http://freescale.github.io but using what I thought would be the latest 
GIT using "repo init -u 
https://github.com/Freescale/fsl-community-bsp-platform" not the rocko 
branch.

I have just downloaded the latest u-boot from its upstream GIT and built 
"U-Boot 2021.04-rc2 (Feb 16 2021 - 12:47:43 +0000)" and that has 
detected the revD1 board and has info on the PMIC. Thanks for the heads 
up. Although 2020.04 appeared to have code to check for the PMIC it 
looks like it only supported the quad processor variant not the dual lite.

As an aside, when building a Linux BSP for this or other iMX6/8 boards 
is http://freescale.github.io the best starting point (being new to the 
iMX6/8 platforms) ?


>
>
>> board and both uboot and the kernel tries to use the
>> imx6dl-wandboard-revb1.dtb rather than the imx6dl-wandboard-revd1.dtb.
>> As a quick hack I have copied imx6dl-wandboard-revd1.dtb over
>> imx6dl-wandboard-revb1.dtb in /boot for the kernel but not touched
>> uboot. The Linux boots fine with this (The Ethernet was not working with
>> imx6dl-wandboard-revb1.dtb). Not sure what is wrong here ?
>>
>> Also anyone know of any sources of information as the wandboard.org site
>> does not seem to be active/maintained (no forums, not contacts etc.) ?
>>
>> Terry
>>
>> Yocto http://freescale.github.io build:
>> [    5.667968] coda 2040000.vpu: Firmware code revision: 46076
>> [    5.673786] coda 2040000.vpu: Initialized CODA960.
>> [    5.678626] coda 2040000.vpu: Firmware version: 3.1.1
>> [    5.714096] coda 2040000.vpu: encoder registered as video4
>> [    5.714250] imx-sdma 20ec000.sdma: loaded firmware 3.5
>> [    5.728100] coda 2040000.vpu: decoder registered as video5
>> [    5.970899] ov5645 1-003c: ov5645_write_reg: write reg error -6:
>> reg=3a19, val=f8
> I don't recall getting these I2C failures.
>
> Which kernel version is this?
>
> I tested camera capture recently on Wandboard with a mainline kernel
> and it worked well.

Thanks for the info. I am coming to the conclusion that either I have a 
duff CAM-OV6545 board (it was new) or the CAM-OV6545 hardware has 
changed in some way. Certainly I cannot get the particular CAM-OV6545 
board working on an iMX6 or iMX8 platform and it doesn't show up with an 
i2cdetect probe before or after the ov6545.ko module is loaded (I think 
the ov6545.ko module may power up the board with a GPIO line, but I have 
found no documentation on the CAM-OV6545module apart from the Wandboard 
user-manual pinout for the connector but the user manual for the 
WB-IMX6U-BW only has schematics for the revA1 board not the revD1). I 
have ordered another CAM-OV6545 board.


>
> Regards,
>
> Fabio Estevam
>
> 
>


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