From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id B2750E00563; Tue, 16 Sep 2014 07:00:19 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low * trust * [209.85.192.172 listed in list.dnswl.org] Received: from mail-pd0-f172.google.com (mail-pd0-f172.google.com [209.85.192.172]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id 8C288E0049D for ; Tue, 16 Sep 2014 07:00:13 -0700 (PDT) Received: by mail-pd0-f172.google.com with SMTP id v10so8720638pde.17 for ; Tue, 16 Sep 2014 07:00:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=CkOi+KyNfzs1Py9pEU+/rqB5Y4HKERHnZef+cC0HBso=; b=JYDCjrWenNZChVgNA3uMbcA8mJ939nBFdKWo6E1ZFzaKt12AirUCLRhLyafRpA9Dp+ TMibmufLh9oqEA93vPyyMrAea0+hedCaPh92bBRCHiV+FCZpbX43It9zFsf2EXy2GA0s Xll98jx6TExXmIXagId4EbfG2WfnQVCI9A121JIlHwFvP2cDwpmkBddHU3NvzOJdPpDf TzuqmLyo0wGw9jwv0DFJp6wcOLA13+IGL2+ByyVo8PqQ9U62hMK4yYN4VR9SPTnrLOEl YmGUSoabH+sh4qZ8BRPwhGXENQGn1cRE6JI54IWjRu6BE2R61xdI6ycxstB/No4S01h/ 3ihQ== X-Gm-Message-State: ALoCoQnvW4XRmOWwcBWkiDw51m6kvHjuwA8tHsjrDXoGMutBrvraTrG2TFVf1zuyWYFQUVByqqxN X-Received: by 10.68.242.134 with SMTP id wq6mr19094246pbc.135.1410876013314; Tue, 16 Sep 2014 07:00:13 -0700 (PDT) Received: from [192.168.1.7] (ip98-165-98-97.ph.ph.cox.net. [98.165.98.97]) by mx.google.com with ESMTPSA id r7sm14237258pdj.75.2014.09.16.07.00.10 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Sep 2014 07:00:11 -0700 (PDT) Message-ID: <54184269.2000701@boundarydevices.com> Date: Tue, 16 Sep 2014 07:00:09 -0700 From: Eric Nelson User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 MIME-Version: 1.0 To: Daiane Angolini , Jacob Pedersen References: <883E391C593F724B94C42216FF27FF4841EEA8A891@EXVMBX003-6.exch003intermedia.net> In-Reply-To: Cc: "meta-freescale@yoctoproject.org" Subject: Re: OV5640 MIPI-CSI2 driver - why the limitations? X-BeenThere: meta-freescale@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-fsl-* layers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 14:00:19 -0000 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit On 09/16/2014 06:43 AM, Daiane Angolini wrote: > On Tue, Sep 16, 2014 at 10:25 AM, Jacob Pedersen wrote: >> Hi folks, >> >> >> >> I'm using a OmniVision OV5640 MIPI-CSI2 image sensor with a iMX6 Quad board, >> and I'm doing some computer vision applications. I'm curious to know why the >> driver for the OV5640 sensor is limited to 30 fps, even though the sensor >> can do 60 fps at 720p and 90 fps at VGA? As far as I can see in the driver, >> the frame rate is clamped to maximum 30 fps. >> >> >> >> Is there a technical reason, or is it just because it hasn't been updated >> for all the supported modes? >> >> >> >> The driver also limits the available image formats, which makes one required >> to do the conversion in software or (as in my case) using the IPU. The IPU >> is fairly fast to do the simple UYVY to RGB24 conversion, but still slower >> than just getting an RGB image from the sensor. > > This limitation is due to the camera device driver. Only few > configurations are implemented. > Those I2C blobs are pretty difficult to get right! Regards, Eric