From patchwork Wed Feb 17 22:11:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 12092477 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=-8.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 55455C433E0 for ; Wed, 17 Feb 2021 22:12:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 291B964D7F for ; Wed, 17 Feb 2021 22:12:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232876AbhBQWMw (ORCPT ); Wed, 17 Feb 2021 17:12:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232263AbhBQWMv (ORCPT ); Wed, 17 Feb 2021 17:12:51 -0500 Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70C31C061574 for ; Wed, 17 Feb 2021 14:12:10 -0800 (PST) Received: by mail-lf1-x134.google.com with SMTP id d24so346102lfs.8 for ; Wed, 17 Feb 2021 14:12:10 -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; bh=WuwKDyyuRXWc7fqRJdkJjYCH0T2gnlyQjQvkLbody1M=; b=BXdFct9Ium+6cfGRin5RAJLPxE6vTrSXIzaqUdNu4F8+vJeuRchkghvrcNPVao3Oig ftGbZG6MALSjuYrcOVZ+VJ3+A8eK/HfpccCkq4JlrH9ovu2zGgiAC6VuH78NphxJRqnu 82gkfIo2G/Q5Qd2OQ+bERMoYxVEuHhxHzHq0aG0K+s1hAXIHbeVedecCdiOAYHVkjGE9 qSld7/vkHgEoFjrSvTslJLf3WWie7wpf41ul9eT/6lMKrmX1j4IvMh8+rdrJl4ZS5zAW lqzmIZm0oJ99ZlOeXi5CMCkpCPdBIbjQXtCr65wcs99ATPwbSY8hNGOrlbbG3t+lsfq5 fAzg== 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; bh=WuwKDyyuRXWc7fqRJdkJjYCH0T2gnlyQjQvkLbody1M=; b=pRvoPj5fE+P6oddXUWbcidzJ4c7PjP0P5NGoB0voxKjBRjF8WhB47wgnbBXypMHNeA fOBgJ5Kddi7fPS+SAur4VlqbndE3hlSoVHvP9ojHvUAkiIWo/melrURqs0eovZ/RTZLb CBz3uSV+MuzgyjGBUmaFpFBPHz8pRzeIP0f+DVMV8xmBJA7hDi6KXUOK21bzUwMMxFUw oR+lg7a00HYyCTq8MIJqMQzD5v+KxCrgNi2cA+Oe4mhhxC7a/wE2jMMW9DEbNvXwqLLd BUvN0RDWX1PAvQV3d4pJglNCwpTaEQUvNZ4DS1/yCrF38zvTDln/vJcO9QrZ9+v8M6WR 4Vaw== X-Gm-Message-State: AOAM531QGD/jgY97fzZW3m0HZ4uLK6YsnUwqBHG7yIVHRP7oUq7XK4ir fLTYm4vzFv727fyPRhD/TFMdQU3yR9gTrg== X-Google-Smtp-Source: ABdhPJyiUQn1DgtgP8VhBGVPISpebORJN8GUzrDnNDS977xRgDas6/AiLbG1cUIdYEeeAROfCsMX/w== X-Received: by 2002:a05:6512:3cc:: with SMTP id w12mr559442lfp.650.1613599928830; Wed, 17 Feb 2021 14:12:08 -0800 (PST) Received: from localhost.localdomain ([85.249.43.69]) by smtp.googlemail.com with ESMTPSA id b7sm382926ljk.52.2021.02.17.14.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Feb 2021 14:12:07 -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 Subject: [PATCH v2 0/3] media: qcom: camss: V4L2_CID_PIXEL_RATE/LINK_FREQ fixes Date: Thu, 18 Feb 2021 01:11:31 +0300 Message-Id: <20210217221134.2606-1-andrey.konovalov@linaro.org> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The first patch adds printing a warning in v4l2_get_link_freq() if V4L2_CID_LINK_FREQ isn't implemented (this is a mandatory control for CSI-2 transmitter drivers [1], but many sensor drivers don't have it currently). The second patch is the start of the work discussed in the "[RFC] Repurpose V4L2_CID_PIXEL_RATE for the sampling rate in the pixel array" thread [2]. I plan to send a few other similar patches for other CSI receiver drivers, and if the current patchset needs to wait for those before it can be merged, that's fine for me. The reason I decided to post the camss patch first is the patch [3] by Vladimir Lypak. The third patch in this series is the Vladimir's patch rebased onto the changes done by the second patch. By replacing getting the pixel clock with v4l2_get_link_freq() the second patch also fixes the integer overflow which Vladimir's patch addresses. So the third patch only needs to fix drivers/media/platform/qcom/camss/camss-vfe.c which the second patch doesn't touch. The resulting patchset is free from the "undefined reference to `__udivdi3'" issue [4] as the u64 value is only divided by a power of 2, which doesn't need do_div(). [1] https://linuxtv.org/downloads/v4l-dvb-apis-new/driver-api/csi2.html [2] https://www.spinics.net/lists/linux-media/msg183183.html [3] https://www.spinics.net/lists/linux-media/msg186875.html [4] https://www.spinics.net/lists/linux-media/msg186918.html Changes in v2: * Added [PATCH 1/3] v4l: common: v4l2_get_link_freq: add printing a warning * camss_get_link_freq() changed to take the actual number of lanes as the third arg vs the number of lanes multiplied by 2 in the first version * Fixed checkpatch warnings and bad indentation