From patchwork Wed Mar 3 17:42:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 12114395 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 A923FC28E80 for ; Wed, 3 Mar 2021 21:52:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8568164E46 for ; Wed, 3 Mar 2021 21:52:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389818AbhCCVr3 (ORCPT ); Wed, 3 Mar 2021 16:47:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241656AbhCCRoX (ORCPT ); Wed, 3 Mar 2021 12:44:23 -0500 Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6FF8DC061762 for ; Wed, 3 Mar 2021 09:43:23 -0800 (PST) Received: by mail-lf1-x12f.google.com with SMTP id f1so38489439lfu.3 for ; Wed, 03 Mar 2021 09:43:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=843Cqu10do3AOcdjRFPledKrGoMFl6vHJzmaFjeMBSM=; b=zix6/HFrJghHi2HtjcVyWLj0N+uc6HhJDfNpB38u08KjESRVwSyspbvWr93KTIwSfl 4cbcUGdgY8NwVv5x/WJWPg/BDaMShLrKU+xdao/Sqsrk2WMrmhH1B2xMXh5h+UGckrms JLmOflDgf8EGD3FsfoxRr/JupQHIkt2hkS3RFbkFWze5IyS8KmVpzFsHGxsO35F/JWni i7Q/FSwCvrva4MASIHcRp4+t5ncbfkg0gB3ZYXNOWFoBgTKVlb5lVkOMAS6A0tLWM4iD zfrgGoMRkbuF0wddNl5ovU0IlkSzfTFIZYZdRQjnPxl07z3KSSLeOlCpLwUSM9D4QQ9D hXdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=843Cqu10do3AOcdjRFPledKrGoMFl6vHJzmaFjeMBSM=; b=h7HN4xNvKRsCHLBzHWscNPjhdgAo3a1YuYlbdzmKLvXR5Ko/982GT72QvfwB5w/vYf dnfso4CvUX3Ao71acfGnUgjGtmZxwyTvG/t++awURQupuzsh/QR3ETeVAoTMTYbKoRae XcqhEphA+aJ/Tk1O8WkFN/YeialqmbR10aCoPcl4ueKn7TKggK3tLRf09wi8MqJBWoJD sATsY+8D3liwOJ6xgpiB+6K+1VATPAfnSxbYLDiMRL+5G1/zv9l2NlrjFQx4zqalTwdl SIBRaU4cCK/luaVPAeF2t6q8TNPcjreaQO/9ncg89/Bp7X91tWnAVH67VzbSbGuRVuvo o4hw== X-Gm-Message-State: AOAM530wWTH2m4+XYKJITtjs/VTGMQSTXdfIUP8JfB/zMKB6yM3sa9nR p+CAt3wiJa3bniUW24joRqmvpg== X-Google-Smtp-Source: ABdhPJzaAvVl7zIW7ODmVHAFeI6Rkd3rf7v10ndmHfmNMb50G2CfnOjWagvTE+aUo0mJvzdSYzvKVA== X-Received: by 2002:a05:6512:3081:: with SMTP id z1mr15929096lfd.257.1614793401892; Wed, 03 Mar 2021 09:43:21 -0800 (PST) Received: from localhost.localdomain ([85.249.43.69]) by smtp.googlemail.com with ESMTPSA id s7sm2101441lfi.140.2021.03.03.09.43.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Mar 2021 09:43:21 -0800 (PST) From: Andrey Konovalov To: junak.pub@gmail.com, robert.foss@linaro.org, sakari.ailus@linux.intel.com Cc: todor.too@gmail.com, agross@kernel.org, bjorn.andersson@linaro.org, mchehab@kernel.org, laurent.pinchart@ideasonboard.com, jacopo@jmondi.org, linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH v3 1/3] v4l: common: v4l2_get_link_freq: add printing a warning Date: Wed, 3 Mar 2021 20:42:48 +0300 Message-Id: <20210303174250.11405-2-andrey.konovalov@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210303174250.11405-1-andrey.konovalov@linaro.org> References: <20210303174250.11405-1-andrey.konovalov@linaro.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Print a warning if V4L2_CID_LINK_FREQ control is not implemented. Signed-off-by: Andrey Konovalov Reviewed-by: Jacopo Mondi Reviewed-by: Laurent Pinchart --- drivers/media/v4l2-core/v4l2-common.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index 133d20e40f82..04af03285a20 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -469,6 +469,11 @@ s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul, return -ENOENT; freq = div_u64(v4l2_ctrl_g_ctrl_int64(ctrl) * mul, div); + + pr_warn("%s: Link frequency estimated using pixel rate: result might be inaccurate\n", + __func__); + pr_warn("%s: Consider implementing support for V4L2_CID_LINK_FREQ in the transmitter driver\n", + __func__); } return freq > 0 ? freq : -EINVAL;