From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from galahad.ideasonboard.com ([185.26.127.97]:52330 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750731AbaH1MCi (ORCPT ); Thu, 28 Aug 2014 08:02:38 -0400 From: Laurent Pinchart To: Stefan Herbrechtsmeier Cc: "linux-media@vger.kernel.org" Subject: Re: Problems with the omap3isp Date: Thu, 28 Aug 2014 14:03:27 +0200 Message-ID: <6301052.X8pjVEUngK@avalon> In-Reply-To: <53FDB1EE.6010107@herbrechtsmeier.net> References: <53C4FC99.9050308@herbrechtsmeier.net> <5795344.auXD3SfuqM@avalon> <53FDB1EE.6010107@herbrechtsmeier.net> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-media-owner@vger.kernel.org List-ID: 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