From patchwork Thu Nov 26 15:01:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 11934209 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,USER_AGENT_GIT autolearn=ham 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 A4334C63697 for ; Thu, 26 Nov 2020 15:02:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 48E5A21D40 for ; Thu, 26 Nov 2020 15:02:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="PzsXu+oH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391308AbgKZPCZ (ORCPT ); Thu, 26 Nov 2020 10:02:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391306AbgKZPCZ (ORCPT ); Thu, 26 Nov 2020 10:02:25 -0500 Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00B74C0617A7 for ; Thu, 26 Nov 2020 07:02:25 -0800 (PST) Received: by mail-lj1-x244.google.com with SMTP id s9so2644271ljo.11 for ; Thu, 26 Nov 2020 07:02:24 -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=tKIO7ZHqYV5jy4apxisfQrLSwqPSVll/CP0rdQ/t36s=; b=PzsXu+oHHKcZsFBm1dpqOuWjNTBUgYFOZgHefsg5h3z3+9GSFA91iYeDFkvM2yWrt2 sec6fls3/ZYRba1XNNR/fpBrAJ8rL9MwrRngXY+RhjGhap8LHrlIXTJGCjPtXyz1qLC8 8NoPw9ZGOwXtptrYzbm4aAlzCKD9mgafWDsjXfrBG8sj3HIQEzMa7RWq7z3y+Nesxk0w vlNZVe6PUyFETNRmb8Eh3rTN/fElCGtTR4uEyl18dZ2MW2G8xioMBVVBES/0MCcULWr3 ddY3j9F/zaH1KN1ancw0Fv/yEnRqYKDlbuGvLR5ybdOC5CsBA6/zp3nEzEmHTW5V+dIg Kjsw== 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=tKIO7ZHqYV5jy4apxisfQrLSwqPSVll/CP0rdQ/t36s=; b=jZvj5B+PIyEDxGihpMgcjPt2LMoO4moUtDwxfbIX+yWmjzgmqpswZWgJiFyItdOWo6 hWtZUQU6EHPG1hzM3i58JG7NzN0QAHG/ppwt2tq4Fim1mmI7z8g0128rlI6M9k0g2KZ6 bm9YEH9oY8Hpq1TCw3JIJ2S6C5HiRFDrs6dAvSFcdybF32Wl7bA4gwwlksONfbV7d/ou 27AQb1Fz4P9MuP5mJy/4oioCJogthhLe/L5FPKVYCDHVP0Ulh8Mcg9m91PJTM4P4glFL 2Oq7BztBzhDIOa6pDYRdsOh7ExSZNBOcBPUkQeVxJ0BwF1spAca74wTyz/Y5wRv3x4+K VQ9Q== X-Gm-Message-State: AOAM530TUjwy11+KPRQyw5ZSXg3AQn0ueZ+0HYqmQ8ciBgAAxNh+5zOz Fb1W73s5lJ4VzSQt9hMKHVP7MQ== X-Google-Smtp-Source: ABdhPJxYDNoQCLwarIvgCeBKJXXL+6Tr0zxyFAg3YHBk4A/uvzJY4vFl41DoXfst4IcEvLlJaxrQLA== X-Received: by 2002:a2e:9a02:: with SMTP id o2mr1422175lji.1.1606402942973; Thu, 26 Nov 2020 07:02:22 -0800 (PST) Received: from localhost.localdomain ([85.249.45.205]) by smtp.googlemail.com with ESMTPSA id i12sm339481lfj.264.2020.11.26.07.02.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Nov 2020 07:02:21 -0800 (PST) From: Andrey Konovalov To: =mchehab@kernel.org, robert.foss@linaro.org Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, peter.griffin@linaro.org, marc.w.gonzalez@free.fr, Andrey Konovalov Subject: [PATCH v2 2/2] media: camss: Make use of V4L2_CAP_IO_MC Date: Thu, 26 Nov 2020 18:01:57 +0300 Message-Id: <20201126150157.25870-2-andrey.konovalov@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201126150157.25870-1-andrey.konovalov@linaro.org> References: <20201126150157.25870-1-andrey.konovalov@linaro.org> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Implement mbus_code filtering for format enumeration. Without this patch libcamera errors out with: "ERROR V4L2 v4l2_videodevice.cpp:982 /dev/video0[cap]: Media bus code filtering not supported by the device" This is the second version of this change which handles the case of several pixel formats corresponding to one media bus format correctly. Signed-off-by: Andrey Konovalov Reviewed-by: Robert Foss --- Changes in v2: - Added the comments to explain V4L2_CAP_IO_MC capability and the way it is implemented in camss driver .../media/platform/qcom/camss/camss-video.c | 28 +++++++++++++++++-- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/qcom/camss/camss-video.c b/drivers/media/platform/qcom/camss/camss-video.c index 20673de9020e..a9bc5438ced3 100644 --- a/drivers/media/platform/qcom/camss/camss-video.c +++ b/drivers/media/platform/qcom/camss/camss-video.c @@ -539,6 +539,7 @@ static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f) { struct camss_video *video = video_drvdata(file); int i, j, k; + u32 mcode = f->mbus_code; if (f->type != video->type) return -EINVAL; @@ -546,10 +547,26 @@ static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f) if (f->index >= video->nformats) return -EINVAL; - /* find index "i" of "k"th unique pixelformat in formats array */ + /* + * Find index "i" of "k"th unique pixelformat in formats array. + * + * If f->mbus_code passed to video_enum_fmt() is not zero, a device + * with V4L2_CAP_IO_MC capability restricts enumeration to only the + * pixel formats that can be produced from that media bus code. + * This is implemented by skipping video->formats[] entries with + * code != f->mbus_code (if f->mbus_code is not zero). + * If the f->mbus_code passed to video_enum_fmt() is not supported, + * -EINVAL is returned. + * If f->mbus_code is zero, all the pixel formats are enumerated. + */ k = -1; for (i = 0; i < video->nformats; i++) { + if (mcode != 0 && video->formats[i].code != mcode) + continue; + for (j = 0; j < i; j++) { + if (mcode != 0 && video->formats[j].code != mcode) + continue; if (video->formats[i].pixelformat == video->formats[j].pixelformat) break; @@ -563,6 +580,11 @@ static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f) } if (k < f->index) + /* + * All the unique pixel formats matching the arguments + * have been enumerated (k >= 0 and f->index > 0), or + * no pixel formats match the non-zero f->mbus_code (k == -1). + */ return -EINVAL; f->pixelformat = video->formats[i].pixelformat; @@ -948,8 +970,8 @@ int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev, } vdev->fops = &msm_vid_fops; - vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING | - V4L2_CAP_READWRITE; + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING + | V4L2_CAP_READWRITE | V4L2_CAP_IO_MC; vdev->ioctl_ops = &msm_vid_ioctl_ops; vdev->release = msm_video_release; vdev->v4l2_dev = v4l2_dev;