Hi Stefan, On Wednesday 27 August 2014 12:24:46 Stefan Herbrechtsmeier wrote: > 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. Not to my knowledge. This crosstalk issue is something I've discovered and reported to Gumstix a couple of years ago. > >> 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. Great. Any chance to see a driver for the ov5647 being submitted to the linux- media mailing list ? :-) -- Regards, Laurent Pinchart -- 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
