From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3AF7C433E1 for ; Fri, 10 Jul 2020 14:18:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 949EB20767 for ; Fri, 10 Jul 2020 14:18:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ART99o99" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727941AbgGJOSr (ORCPT ); Fri, 10 Jul 2020 10:18:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726725AbgGJOSq (ORCPT ); Fri, 10 Jul 2020 10:18:46 -0400 Received: from mail-qk1-x736.google.com (mail-qk1-x736.google.com [IPv6:2607:f8b0:4864:20::736]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B65ABC08C5CE for ; Fri, 10 Jul 2020 07:18:46 -0700 (PDT) Received: by mail-qk1-x736.google.com with SMTP id q198so5352769qka.2 for ; Fri, 10 Jul 2020 07:18:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-transfer-encoding:content-language; bh=Ecwp4qeE5AwW/CIS7eF6biTzcUuNGn4IxHz8o2Cn+8g=; b=ART99o990F4DLuj/67fKjkWmOG0L3NvfKepr4bmgXvov8eInQTVa38Y8b5ZmZDoEUu 9uSLm4O6E0+tObPqBYW1HOXGQImC3vuYUATZ3YWeC9SgLmsCyKtZJeeHfY0yPCsEkNJ7 h/Dd74M5V0Hj2B4H8xVqhPGtFfdZgXxa+B1RS4aiR6QYvLIaxeo5l1/dgkbTMSfUPAqG V5fhUPhBu5K2QbhaAgXJKTmeUdEOaWAQ9nvLaIkBrFm9G6et6zopPV9F1RvvfOVAuaD8 tbDQgSEBlSWNviFmPeMTMqZL4Y237NLRafsct3shRYOM3VM6faL1/707Q/MjKYPUfEvN ia0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-transfer-encoding:content-language; bh=Ecwp4qeE5AwW/CIS7eF6biTzcUuNGn4IxHz8o2Cn+8g=; b=rVkOxNrrOv+gS0fQMtk5MpD/yt1UDleYNYPOwL71PwpnAYU4bYQZRncPOX0uDSv2eg NM+ui3aaDXchqhIYTeJshGEc13kJGySvXYpq223ouIm0Pf//DewwGhTT282fTCm+UfQH THCYNgDtuus6zocXsCAXJqVUIMeGCTrpssIjKSSzSx7EV0b3JNqlfTYajSvMF6dHXm+w TH0BPa8gQhJ1ifwHDhzCd0BuHibmd/a5FJjlI5I8ltwkB7tXPC7OlkAup1+1SF3vpi2E 6z+zQgt1Ac5mMTtFg2VLUNPARB9G0NPwW8fWENdRvzWa8j5U9e6YUqk4MBVnbAZIO5j9 +WeQ== X-Gm-Message-State: AOAM530/G+Qx2r8MCIe3jEwhLGQoPiIFkvtJLuP2r1dd+0gvnH97A0Bt tx01+1WZblqoojNFlZcwD+1nzA4GQt0= X-Google-Smtp-Source: ABdhPJzmUMWLFik/M2uan1ric0EV5eV5mILFhD+7JgxRwake/cqW7TOUe7otHJnu6KKEgUcUM2Eugw== X-Received: by 2002:a37:88d:: with SMTP id 135mr71047731qki.390.1594390725808; Fri, 10 Jul 2020 07:18:45 -0700 (PDT) Received: from [10.0.0.101] ([177.86.199.79]) by smtp.gmail.com with ESMTPSA id i10sm9613788qkn.126.2020.07.10.07.18.44 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Jul 2020 07:18:45 -0700 (PDT) To: linux-media@vger.kernel.org From: Lucas Subject: Range values for V4L2_CID_* commands Message-ID: Date: Fri, 10 Jul 2020 11:18:37 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hello, how do I obtain the accepted range of values for each V4L2_CID command? Take V4L2_CID_BRIGHTNESS as an example, how do I know what is the maximum and minimum values accepted for it? I have tried to use 'v4l2_ioctl(fd, VIDIOC_G_CTRL, &query);' thinking that would be stored in the maximum and minimum members for the struct v4l2_queryctrl but that does not appear to be the case as the values for those members are always zero. Thank you.