[{"id":25254,"web_url":"https://patchwork.libcamera.org/comment/25254/","msgid":"","date":"2022-10-04T06:54:11","subject":"Re: [libcamera-devel] [PATCH 2/2] libcamera: v4l2_device: List\n\tcontrols when setting file descriptor","submitter":{"id":86,"url":"https://patchwork.libcamera.org/api/people/86/","name":"Umang Jain","email":"umang.jain@ideasonboard.com"},"content":"Hi Laurent,\n\nThank you for the patch.\n\nOn 10/4/22 12:37 AM, Laurent Pinchart via libcamera-devel wrote:\n> The base V4L2Device class is bound to a video device node by either\n> open(), which opens the device node and creates a new file descriptor,\n> or setFd(), which takes an already open file descriptor. The former\n> populates the V4L2Device instance controls, while the latter doesn't.\n> This prevents using controls on V4L2 M2M devices. Fix it by populating\n> controls in setFd(), which is called by open().\n>\n> Signed-off-by: Laurent Pinchart \n\nReviewed-by: Umang Jain \n> ---\n> src/libcamera/v4l2_device.cpp | 4 ++--\n> 1 file changed, 2 insertions(+), 2 deletions(-)\n>\n> diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp\n> index d7ebf63811b4..c4d40d7d0842 100644\n> --- a/src/libcamera/v4l2_device.cpp\n> +++ b/src/libcamera/v4l2_device.cpp\n> @@ -97,8 +97,6 @@ int V4L2Device::open(unsigned int flags)\n> \n> \tsetFd(std::move(fd));\n> \n> -\tlistControls();\n> -\n> \treturn 0;\n> }\n> \n> @@ -129,6 +127,8 @@ int V4L2Device::setFd(UniqueFD fd)\n> \tfdEventNotifier_->activated.connect(this, &V4L2Device::eventAvailable);\n> \tfdEventNotifier_->setEnabled(false);\n> \n> +\tlistControls();\n> +\n> \treturn 0;\n> }\n>","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 9DC22C0DA4\n\tfor ;\n\tTue, 4 Oct 2022 06:54:19 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3243360A89;\n\tTue, 4 Oct 2022 08:54:19 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 9DC5C603F6\n\tfor ;\n\tTue, 4 Oct 2022 08:54:17 +0200 (CEST)","from [192.168.1.103] (unknown [103.251.226.94])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 710592D9;\n\tTue, 4 Oct 2022 08:54:16 +0200 (CEST)"],"DKIM-Signature":["v=1; a=rsa-sha256; c=relaxed/simple; d=libcamera.org;\n\ts=mail; t=1664866459;\n\tbh=M9p5GuaqcXssu614hqW4s9dE9ZLqGrhh13Ziy71UGXc=;\n\th=Date:To:References:In-Reply-To:Subject:List-Id:List-Unsubscribe:\n\tList-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:\n\tFrom;\n\tb=QAemUfORttsKn1JbC4963vMO4wUQTkxbj+DsnAksA+wD/uAmmGAAGzatBoc2jJUmF\n\t3lvlExzdHE4aE1zgQlE3y9XibZMZeSMESoOo53K1zBibyFEvU9V06fXWN90K1gAmy0\n\t8GaspM/GhtKIm87xrIxaj1zGSIBEXZPIXs7d1dPFLSaubxWfNvggEdIzGv5hneTJMn\n\t/c+LKfF7jMa+HZRxUKm5/s2vyWFD8dg1LwJawAGbFE5CaB5V9+9q5UvwKtMrDspwxv\n\tHp1sj+/OHEIavenwqe4oXeCnbiYKMApiwtKca0hPaO6qk860Yk7Y98BE3p8kIiAlHG\n\tnaAEgMwxSuSTg==","v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1664866457;\n\tbh=M9p5GuaqcXssu614hqW4s9dE9ZLqGrhh13Ziy71UGXc=;\n\th=Date:Subject:To:References:From:In-Reply-To:From;\n\tb=OkpsnEdg6/GVkWQW7Jx5nQLvFfBcMb75SQ97lybUJn3/QrUTsOe5E6uR3LFT1Xw8w\n\t8XdLKFhlr+k1vgIoopkVNDtZ0ZwhdNM0GwY9siLSlUJ+UNTdYxHZmRfBCZYqCn2ZbQ\n\t8z107AHmrU4O0gol5vy7m2uyH3ZrSfVn+9gNWxmY="],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"OkpsnEdg\"; dkim-atps=neutral","Message-ID":"","Date":"Tue, 4 Oct 2022 12:24:11 +0530","MIME-Version":"1.0","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101\n\tThunderbird/102.2.1","Content-Language":"en-US","To":"Laurent Pinchart ,\n\tlibcamera-devel@lists.libcamera.org","References":"<20221003190706.19816-1-laurent.pinchart@ideasonboard.com>\n\t<20221003190706.19816-3-laurent.pinchart@ideasonboard.com>","In-Reply-To":"<20221003190706.19816-3-laurent.pinchart@ideasonboard.com>","Content-Type":"text/plain; charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","Subject":"Re: [libcamera-devel] [PATCH 2/2] libcamera: v4l2_device: List\n\tcontrols when setting file descriptor","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","From":"Umang Jain via libcamera-devel ","Reply-To":"Umang Jain ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":25259,"web_url":"https://patchwork.libcamera.org/comment/25259/","msgid":"","date":"2022-10-04T11:50:55","subject":"Re: [libcamera-devel] [PATCH 2/2] libcamera: v4l2_device: List\n\tcontrols when setting file descriptor","submitter":{"id":107,"url":"https://patchwork.libcamera.org/api/people/107/","name":"Xavier Roumegue","email":"xavier.roumegue@oss.nxp.com"},"content":"Hi Laurent,\n\nThanks for your patch !\n\nOn 10/3/22 21:07, Laurent Pinchart wrote:\n> The base V4L2Device class is bound to a video device node by either\n> open(), which opens the device node and creates a new file descriptor,\n> or setFd(), which takes an already open file descriptor. The former\n> populates the V4L2Device instance controls, while the latter doesn't.\n> This prevents using controls on V4L2 M2M devices. Fix it by populating\n> controls in setFd(), which is called by open().\n> \n> Signed-off-by: Laurent Pinchart \n> ---\n> src/libcamera/v4l2_device.cpp | 4 ++--\n> 1 file changed, 2 insertions(+), 2 deletions(-)\n> \n> diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp\n> index d7ebf63811b4..c4d40d7d0842 100644\n> --- a/src/libcamera/v4l2_device.cpp\n> +++ b/src/libcamera/v4l2_device.cpp\n> @@ -97,8 +97,6 @@ int V4L2Device::open(unsigned int flags)\n> \n> \tsetFd(std::move(fd));\n> \n> -\tlistControls();\n> -\n> \treturn 0;\n> }\n> \n> @@ -129,6 +127,8 @@ int V4L2Device::setFd(UniqueFD fd)\n> \tfdEventNotifier_->activated.connect(this, &V4L2Device::eventAvailable);\n> \tfdEventNotifier_->setEnabled(false);\n> \n> +\tlistControls();\n> +\n> \treturn 0;\n> }\n> \n\nReviewed-by: Xavier Roumegue ","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id B171CBD16B\n\tfor ;\n\tTue, 4 Oct 2022 11:51:00 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 60E3D60AA7;\n\tTue, 4 Oct 2022 13:51:00 +0200 (CEST)","from EUR05-VI1-obe.outbound.protection.outlook.com\n\t(mail-vi1eur05on2073.outbound.protection.outlook.com [40.107.21.73])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 511D6601C7\n\tfor ;\n\tTue, 4 Oct 2022 13:50:58 +0200 (CEST)","from PAXPR04MB8703.eurprd04.prod.outlook.com\n\t(2603:10a6:102:21e::22)\n\tby DB9PR04MB8234.eurprd04.prod.outlook.com (2603:10a6:10:25d::18)\n\twith Microsoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5676.31;\n\tTue, 4 Oct 2022 11:50:56 +0000","from PAXPR04MB8703.eurprd04.prod.outlook.com\n\t([fe80::4f72:a35a:8c60:63f1]) by\n\tPAXPR04MB8703.eurprd04.prod.outlook.com\n\t([fe80::4f72:a35a:8c60:63f1%6]) with mapi id 15.20.5676.028;\n\tTue, 4 Oct 2022 11:50:56 +0000"],"DKIM-Signature":["v=1; 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