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
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
