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{ "id": 3117, "url": "https://patchwork.libcamera.org/api/covers/3117/?format=api", "web_url": "https://patchwork.libcamera.org/cover/3117/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20200316214310.27665-1-laurent.pinchart@ideasonboard.com>", "date": "2020-03-16T21:43:00", "name": "[libcamera-devel,v2,00/10] Simple pipeline handler", "submitter": { "id": 2, "url": "https://patchwork.libcamera.org/api/people/2/?format=api", "name": "Laurent Pinchart", "email": "laurent.pinchart@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/cover/3117/mbox/", "series": [ { "id": 724, "url": "https://patchwork.libcamera.org/api/series/724/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=724", "date": "2020-03-16T21:43:00", "name": "Simple pipeline handler", "version": 2, "mbox": "https://patchwork.libcamera.org/series/724/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/covers/3117/comments/", "headers": { "Return-Path": "<laurent.pinchart@ideasonboard.com>", "Received": [ "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 8225760422\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Mar 2020 22:43:20 +0100 (CET)", "from pendragon.bb.dnainternet.fi (81-175-216-236.bb.dnainternet.fi\n\t[81.175.216.236])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id BD360AC1;\n\tMon, 16 Mar 2020 22:43:19 +0100 (CET)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1584395000;\n\tbh=X2CTfJ1NH7LIO1Un48YxWWvSry5h7j7CF01J+IeOGzw=;\n\th=From:To:Cc:Subject:Date:From;\n\tb=EhpiO1cYlVJ+AdTa4SRtquw2PURIl+jdnzKNwox8zpYjfNKtUY5MnOr4UYli7j/LV\n\t15dFWg+tf891wGgFHixutwkImnQRJeYCyD/UWa8mkWxUQvMYLUd8RfrVrIvbVpY8bS\n\thNDLzYUqNolcGmlaOZIGJ5HKIKj2d5NQcZGu8zBk=", "From": "Laurent Pinchart <laurent.pinchart@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Martijn Braam <martijn@brixit.nl>, Mickael GUENE <mickael.guene@st.com>, \n\tBenjamin GAIGNARD <benjamin.gaignard@st.com>,\n\tAndrey Konovalov <andrey.konovalov@linaro.org>", "Date": "Mon, 16 Mar 2020 23:43:00 +0200", "Message-Id": "<20200316214310.27665-1-laurent.pinchart@ideasonboard.com>", "X-Mailer": "git-send-email 2.24.1", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 00/10] Simple pipeline handler", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "X-List-Received-Date": "Mon, 16 Mar 2020 21:43:20 -0000" }, "content": "Hello,\n\nThis patch series builds on Martijn's work to implement a pipeline\nhandler for simpler pipelines. Additional information about the pipeline\nhandler itself can be found in patch 08/10.\n\nCompared to v1, this version has been rebased on top of the buffer\nmanagement simplification ([1]). It also includes support for simple\nconverters, V4L2 mem2mem device that perform format conversion, to\nextend the number of supported pixel formats.\n\n[1] https://lists.libcamera.org/pipermail/libcamera-devel/2020-March/007224.html\n\nPatches 01/10 to 07/10 haven't been changed compare to v1. They add a\nV4L2 API extension required for pipeline auto-configuration (01/10), as\nwell aw new utility functions and miscellaneous small extensions (02/10\nto 07/10).\n\nPatch 08/10 adds the new simple pipeline handler, patch 09/10 the\nsimpler converter, and patch 10/10 integrates converter support into the\nsimple pipeline handler. The converter API should probably be improved,\nI've implemented it as a proof of concept. Other options also exist,\nsuch as making the simple pipeline handler a base class from which more\nspecialized pipeline handlers could derive from, and implement support\nfor converters in device-specific code.\n\nThe code has been tested on an i.MX7 platform with a greyscale sensor\nand the i.MX PXP as format converter to produce RGB. I've kept sun6i-csi\nfrom Martijn's work in the list of supported drivers, but supporting\nthat platform will require extending the corresponding driver to support\nthe VIDIOC_ENUM_FMT extension. Once done, if all goes well, the platform\nshould work out of the box.\n\nAs before, this is meant to be compatible with the stm32 and qcom-camss\nthat pipeline handlers have previously been submitted for. The\nrespective drivers need be added to the drivers array in\nSimplePipelineHandler::match(), and, as for sun6i-csi, support for the\nVIDIOC_ENUM_FMT extension needs to be implemented in the drivers, which\nshould be fairly easy.\n\nLaurent Pinchart (9):\n [DNI] include: linux: Extend VIDIOC_ENUM_FMT to support MC-centric\n devices\n libcamera: utils: Add string join function\n libcamera: v4l2_subdevice: Extend [gs]etFormat() to specify format\n type\n libcamera: v4l2_videodevice: Support filtering formats by media bus\n code\n libcamera: v4l2_videodevice: Expose the device capabilities\n libcamera: v4l2_videodevice: Downgrade 4CC conversion errors to\n warnings\n libcamera: v4l2_videodevice: Map V4L2_PIX_FMT_GREY to DRM FourCC\n libcamera: pipeline: simple: Add simple format converter\n libcamera: pipeline: simple: Integrate converter support\n\nMartijn Braam (1):\n libcamera: pipeline: Add a simple pipeline handler\n\n include/linux/videodev2.h | 4 +-\n src/libcamera/include/utils.h | 44 +\n src/libcamera/include/v4l2_subdevice.h | 11 +-\n src/libcamera/include/v4l2_videodevice.h | 6 +-\n src/libcamera/pipeline/meson.build | 1 +\n src/libcamera/pipeline/simple/converter.cpp | 210 +++++\n src/libcamera/pipeline/simple/converter.h | 60 ++\n src/libcamera/pipeline/simple/meson.build | 4 +\n src/libcamera/pipeline/simple/simple.cpp | 855 ++++++++++++++++++++\n src/libcamera/utils.cpp | 16 +\n src/libcamera/v4l2_subdevice.cpp | 23 +-\n src/libcamera/v4l2_videodevice.cpp | 36 +-\n test/utils.cpp | 7 +-\n 13 files changed, 1261 insertions(+), 16 deletions(-)\n create mode 100644 src/libcamera/pipeline/simple/converter.cpp\n create mode 100644 src/libcamera/pipeline/simple/converter.h\n create mode 100644 src/libcamera/pipeline/simple/meson.build\n create mode 100644 src/libcamera/pipeline/simple/simple.cpp" }