{"id":16885,"url":"https://patchwork.libcamera.org/api/1.1/patches/16885/?format=json","web_url":"https://patchwork.libcamera.org/patch/16885/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20220801000543.3501-9-laurent.pinchart@ideasonboard.com>","date":"2022-08-01T00:05:38","name":"[libcamera-devel,08/13] libcamera: v4l2_subdevice: Add support for the V4L2 subdev routing API","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"da53ce209e82e9c31bd6c0d7ccac3c6e69a55cc4","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/1.1/people/2/?format=json","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/16885/mbox/","series":[{"id":3352,"url":"https://patchwork.libcamera.org/api/1.1/series/3352/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=3352","date":"2022-08-01T00:05:30","name":"libcamera: pipeline: simple: Support the NXP i.MX8 ISI","version":1,"mbox":"https://patchwork.libcamera.org/series/3352/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/16885/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/16885/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 611B3BE173\n\tfor ;\n\tMon, 1 Aug 2022 00:06:02 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 137146332A;\n\tMon, 1 Aug 2022 02:06:02 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 77D9363312\n\tfor ;\n\tMon, 1 Aug 2022 02:06:00 +0200 (CEST)","from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi\n\t[62.78.145.57])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 14110A42;\n\tMon, 1 Aug 2022 02:06:00 +0200 (CEST)"],"DKIM-Signature":["v=1; 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dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"ptBlot2v\"; dkim-atps=neutral","To":"libcamera-devel@lists.libcamera.org","Date":"Mon, 1 Aug 2022 03:05:38 +0300","Message-Id":"<20220801000543.3501-9-laurent.pinchart@ideasonboard.com>","X-Mailer":"git-send-email 2.35.1","In-Reply-To":"<20220801000543.3501-1-laurent.pinchart@ideasonboard.com>","References":"<20220801000543.3501-1-laurent.pinchart@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH 08/13] libcamera: v4l2_subdevice: Add\n\tsupport for the V4L2 subdev routing API","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","From":"Laurent Pinchart via libcamera-devel\n\t","Reply-To":"Laurent Pinchart ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"From: Jacopo Mondi \n\nExtend the V4L2Subdevice class to support getting and setting routing\ntables.\n\nSigned-off-by: Jacopo Mondi \nSigned-off-by: Laurent Pinchart \n---\nChanges on top of Jacopo's initial work:\n\n- Turn Routing struct into a class, an inherit from std::vector\n- Drop Routing::numRoutes\n---\n include/libcamera/internal/v4l2_subdevice.h | 9 ++\n src/libcamera/v4l2_subdevice.cpp | 105 ++++++++++++++++++++\n 2 files changed, 114 insertions(+)","diff":"diff --git a/include/libcamera/internal/v4l2_subdevice.h b/include/libcamera/internal/v4l2_subdevice.h\nindex a1d3144c6a7f..00be17bb1465 100644\n--- a/include/libcamera/internal/v4l2_subdevice.h\n+++ b/include/libcamera/internal/v4l2_subdevice.h\n@@ -61,6 +61,12 @@ public:\n \t\tActiveFormat = V4L2_SUBDEV_FORMAT_ACTIVE,\n \t};\n \n+\tclass Routing : public std::vector\n+\t{\n+\tpublic:\n+\t\tstd::string toString() const;\n+\t};\n+\n \texplicit V4L2Subdevice(const MediaEntity *entity);\n \t~V4L2Subdevice();\n \n@@ -80,6 +86,9 @@ public:\n \tint setFormat(unsigned int pad, V4L2SubdeviceFormat *format,\n \t\t Whence whence = ActiveFormat);\n \n+\tint getRouting(Routing *routing, Whence whence = ActiveFormat);\n+\tint setRouting(Routing *routing, Whence whence = ActiveFormat);\n+\n \tconst std::string &model();\n \tconst V4L2SubdeviceCapability &caps() const { return caps_; }\n \ndiff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp\nindex a1672b2365f2..fe8b8e4eae2a 100644\n--- a/src/libcamera/v4l2_subdevice.cpp\n+++ b/src/libcamera/v4l2_subdevice.cpp\n@@ -288,6 +288,32 @@ std::ostream &operator<<(std::ostream &out, const V4L2SubdeviceFormat &f)\n * \\brief The format operation applies to TRY formats\n */\n \n+/**\n+ * \\class V4L2Subdevice::Routing\n+ * \\brief V4L2 subdevice routing table\n+ *\n+ * This class stores a subdevice routing table as a vector of routes.\n+ */\n+\n+/**\n+ * \\brief Assemble and return a string describing the routing table\n+ * \\return A string describing the routing table\n+ */\n+std::string V4L2Subdevice::Routing::toString() const\n+{\n+\tstd::stringstream routing;\n+\n+\tfor (const auto &[i, route] : utils::enumerate(*this)) {\n+\t\trouting << \"[\" << i << \"] \"\n+\t\t\t<< route.sink_pad << \"/\" << route.sink_stream << \" -> \"\n+\t\t\t<< route.source_pad << \"/\" << route.source_stream;\n+\t\tif (i != size() - 1)\n+\t\t\trouting << \", \";\n+\t}\n+\n+\treturn routing.str();\n+}\n+\n /**\n * \\brief Create a V4L2 subdevice from a MediaEntity using its device node\n * path\n@@ -517,6 +543,85 @@ int V4L2Subdevice::setFormat(unsigned int pad, V4L2SubdeviceFormat *format,\n \treturn 0;\n }\n \n+/**\n+ * \\brief Retrieve the subdevice's internal routing table\n+ * \\param[out] routing The routing table\n+ * \\param[in] whence The routing table to get, \\ref V4L2Subdevice::ActiveFormat\n+ * \"ActiveFormat\" or \\ref V4L2Subdevice::TryFormat \"TryFormat\"\n+ *\n+ * \\return 0 on success or a negative error code otherwise\n+ */\n+int V4L2Subdevice::getRouting(Routing *routing, Whence whence)\n+{\n+\tif (!caps_.hasStreams())\n+\t\treturn 0;\n+\n+\tstruct v4l2_subdev_routing rt = {};\n+\n+\trt.which = whence;\n+\n+\tint ret = ioctl(VIDIOC_SUBDEV_G_ROUTING, &rt);\n+\tif (ret == 0 || ret == -ENOTTY)\n+\t\treturn ret;\n+\n+\tif (ret != -ENOSPC) {\n+\t\tLOG(V4L2, Error)\n+\t\t\t<< \"Failed to retrieve number of routes: \"\n+\t\t\t<< strerror(-ret);\n+\t\treturn ret;\n+\t}\n+\n+\trouting->resize(rt.num_routes);\n+\trt.routes = reinterpret_cast(routing->data());\n+\n+\tret = ioctl(VIDIOC_SUBDEV_G_ROUTING, &rt);\n+\tif (ret) {\n+\t\tLOG(V4L2, Error)\n+\t\t\t<< \"Failed to retrieve routes: \" << strerror(-ret);\n+\t\treturn ret;\n+\t}\n+\n+\tif (rt.num_routes != routing->size()) {\n+\t\tLOG(V4L2, Error) << \"Invalid number of routes\";\n+\t\treturn -EINVAL;\n+\t}\n+\n+\treturn 0;\n+}\n+\n+/**\n+ * \\brief Set a routing table on the V4L2 subdevice\n+ * \\param[inout] routing The routing table\n+ * \\param[in] whence The routing table to set, \\ref V4L2Subdevice::ActiveFormat\n+ * \"ActiveFormat\" or \\ref V4L2Subdevice::TryFormat \"TryFormat\"\n+ *\n+ * Apply to the V4L2 subdevice the routing table \\a routing and update its\n+ * content to reflect the actually applied routing table as getRouting() would\n+ * do.\n+ *\n+ * \\return 0 on success or a negative error code otherwise\n+ */\n+int V4L2Subdevice::setRouting(Routing *routing, Whence whence)\n+{\n+\tif (!caps_.hasStreams())\n+\t\treturn 0;\n+\n+\tstruct v4l2_subdev_routing rt = {};\n+\trt.which = whence;\n+\trt.num_routes = routing->size();\n+\trt.routes = reinterpret_cast(routing->data());\n+\n+\tint ret = ioctl(VIDIOC_SUBDEV_S_ROUTING, &rt);\n+\tif (ret) {\n+\t\tLOG(V4L2, Error) << \"Failed to set routes: \" << strerror(-ret);\n+\t\treturn ret;\n+\t}\n+\n+\trouting->resize(rt.num_routes);\n+\n+\treturn 0;\n+}\n+\n /**\n * \\brief Retrieve the model name of the device\n *\n","prefixes":["libcamera-devel","08/13"]}