Re: Problems with the omap3isp

Stefan Herbrechtsmeier
2014-08-27T10:24:50Z

Hi Laurent,

Am 04.08.2014 um 17:25 schrieb Laurent Pinchart:
> On Monday 04 August 2014 11:24:13 Stefan Herbrechtsmeier wrote:
>> Hi Laurent,
>>
>> thank you very much for your help.
>>
>> The problem is cross talk on the camera flex cable of the Gumstix Overo.
>> The XCLKA signal is beside PCLK and VS.
> Right, I should have mentioned that. It's a know issue, and there's not much
> that can be done about it without a hardware redesign. A ground (or power
> supply) signal should really have been inserted on each side of the XCLKA and
> PCLK signals.
Exists a list about knowing issues with the Gumstix Overo? Because I
have some problems with the MMC3 too.

>> Additionally the OV5647 camera tristate all outputs by default. This leads
>> to HS_VS_IRQ interrupts.
> This should be taken care of by pull-up or pull-down resistors on the camera
> signals. I've disabled them with the Caspa camera given the low drive strength
> of the buffer on the camera board, but you could enable them on your system.
I have manually rework my camera adapter and change the camera clock
from XCLKA to XCLKB. Additionally I have enable the pull-ups in my
device tree. Now the camera sensor from the Raspberry Pi camera module
works together with the Gumstix Overo.

Thank you for your help,
Stefan