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{ "id": 21325, "url": "https://patchwork.libcamera.org/api/patches/21325/?format=api", "web_url": "https://patchwork.libcamera.org/patch/21325/", "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": "<20240923060551.1849065-2-chenghaoyang@google.com>", "date": "2024-09-23T06:02:35", "name": "[1/1] libcamera: Add request API support for media controller device", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "51d51551f5876cce837d2a2e0831ff79a127593b", "submitter": { "id": 117, "url": "https://patchwork.libcamera.org/api/people/117/?format=api", "name": "Cheng-Hao Yang", "email": "chenghaoyang@chromium.org" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/21325/mbox/", "series": [ { "id": 4611, "url": "https://patchwork.libcamera.org/api/series/4611/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=4611", "date": "2024-09-23T06:02:34", "name": "Add request API support for MediaDevice", "version": 1, "mbox": "https://patchwork.libcamera.org/series/4611/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/21325/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/21325/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "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 F27FCC0F1B\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 23 Sep 2024 06:06:05 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 4306163508;\n\tMon, 23 Sep 2024 08:06:04 +0200 (CEST)", "from mail-pg1-x52e.google.com (mail-pg1-x52e.google.com\n\t[IPv6:2607:f8b0:4864:20::52e])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 1E3AA634F4\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 23 Sep 2024 08:06:02 +0200 (CEST)", "by mail-pg1-x52e.google.com with SMTP id\n\t41be03b00d2f7-7db12af2f31so3315999a12.1\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSun, 22 Sep 2024 23:06:02 -0700 (PDT)", "from chenghaoyang-low.c.googlers.com.com\n\t(208.158.221.35.bc.googleusercontent.com. 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\n\tSun, 22 Sep 2024 23:05:59 -0700 (PDT)", "From": "Harvey Yang <chenghaoyang@chromium.org>", "X-Google-Original-From": "Harvey Yang <chenghaoyang@google.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Han-Lin Chen <hanlinchen@chromium.org>,\n\tHarvey Yang <chenghaoyang@chromium.org>", "Subject": "[PATCH 1/1] libcamera: Add request API support for media controller\n\tdevice", "Date": "Mon, 23 Sep 2024 06:02:35 +0000", "Message-ID": "<20240923060551.1849065-2-chenghaoyang@google.com>", "X-Mailer": "git-send-email 2.46.0.792.g87dc391469-goog", "In-Reply-To": "<20240923060551.1849065-1-chenghaoyang@google.com>", "References": "<20240923060551.1849065-1-chenghaoyang@google.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "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>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "From: Han-Lin Chen <hanlinchen@chromium.org>\n\nThis patch adds `allocateRequests` with MEDIA_IOC_REQUEST_ALLOC\n, `queueRequest` with MEDIA_REQUEST_IOC_QUEUE, and `reInitRequest`\nwith MEDIA_REQUEST_IOC_REINIT.\n\nSigned-off-by: Han-Lin Chen <hanlinchen@chromium.org>\nCo-developed-by: Harvey Yang <chenghaoyang@chromium.org>\n---\n include/libcamera/internal/media_device.h | 4 ++\n src/libcamera/media_device.cpp | 87 +++++++++++++++++++++++\n 2 files changed, 91 insertions(+)", "diff": "diff --git a/include/libcamera/internal/media_device.h b/include/libcamera/internal/media_device.h\nindex e412d3a0..8f54dd12 100644\n--- a/include/libcamera/internal/media_device.h\n+++ b/include/libcamera/internal/media_device.h\n@@ -53,6 +53,10 @@ public:\n \tMediaLink *link(const MediaPad *source, const MediaPad *sink);\n \tint disableLinks();\n \n+\tint allocateRequests(unsigned int count, std::vector<UniqueFD> &requests);\n+\tint queueRequest(int requestFd);\n+\tint reInitRequest(int requestFd);\n+\n \tSignal<> disconnected;\n \n protected:\ndiff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp\nindex bd054552..47b75809 100644\n--- a/src/libcamera/media_device.cpp\n+++ b/src/libcamera/media_device.cpp\n@@ -9,6 +9,7 @@\n \n #include <errno.h>\n #include <fcntl.h>\n+#include <poll.h>\n #include <stdint.h>\n #include <string>\n #include <string.h>\n@@ -836,4 +837,90 @@ int MediaDevice::setupLink(const MediaLink *link, unsigned int flags)\n \treturn 0;\n }\n \n+/**\n+ * \\brief Allocate \\a count requests with ioctl\n+ * \\param[in] count The number of requests to be allocated\n+ * \\param[out] requests The request file descriptors to be returned\n+ *\n+ * This function returns request file descriptors if the MediaDevice supports\n+ * requests. The file descriptors can then be queued and re-inited afterwards.\n+ *\n+ * \\sa queueRequest(int requestFd)\n+ * \\sa reInitRequest(int requestFd)\n+ *\n+ * \\return 0 on success or a negative error code otherwise\n+ */\n+int MediaDevice::allocateRequests(unsigned int count, std::vector<UniqueFD> &requests)\n+{\n+\tfor (unsigned int i = 0; i < count; i++) {\n+\t\tint fd;\n+\t\tint ret = ioctl(fd_.get(), MEDIA_IOC_REQUEST_ALLOC, &fd);\n+\t\tif (ret) {\n+\t\t\tLOG(MediaDevice, Error) << \"Allocate request failed \"\n+\t\t\t\t\t\t<< strerror(-ret);\n+\t\t\treturn -EBUSY;\n+\t\t}\n+\t\trequests.emplace_back(fd);\n+\t}\n+\n+\treturn 0;\n+}\n+\n+/**\n+ * \\brief Queue a request with ioctl\n+ * \\param[in] requestFd The request file descriptor\n+ *\n+ * This function queues a request that was allocated before.\n+ *\n+ * \\sa allocateRequests(unsigned int count, std::vector<UniqueFD> &requests)\n+ * \\sa reInitRequest(int requestFd)\n+ *\n+ * \\return 0 on success or a negative error code otherwise\n+ */\n+int MediaDevice::queueRequest(int requestFd)\n+{\n+\tint ret = ioctl(requestFd, MEDIA_REQUEST_IOC_QUEUE, NULL);\n+\tif (ret)\n+\t\tLOG(MediaDevice, Error) << \"QueueRequest fd \" << requestFd\n+\t\t\t\t\t<< \"failed: \" << strerror(-ret);\n+\treturn ret;\n+}\n+\n+/**\n+ * \\brief Re-init a request with ioctl\n+ * \\param[in] requestFd The request file descriptor\n+ *\n+ * This function recycles a request that was allocated and queued before. It\n+ * polls on \\a requestFd to ensure the request is completed, and reinits the\n+ * request.\n+ *\n+ * \\sa allocateRequests(unsigned int count, std::vector<UniqueFD> &requests)\n+ * \\sa queueRequest(int requestFd)\n+ *\n+ * \\return 0 on success or a negative error code otherwise\n+ */\n+int MediaDevice::reInitRequest(int requestFd)\n+{\n+\tstruct pollfd pfd;\n+\n+\tpfd.fd = requestFd;\n+\tpfd.events = POLLPRI;\n+\n+\tint ret = TEMP_FAILURE_RETRY(poll(&pfd, 1, 300));\n+\tif (ret < 0)\n+\t\tLOG(MediaDevice, Error) << \"The request \" << requestFd\n+\t\t\t\t\t<< \" polled failed: \" << strerror(-ret);\n+\telse if (ret == 0)\n+\t\tLOG(MediaDevice, Error) << \"The request \" << requestFd\n+\t\t\t\t\t<< \" polled timeout: \" << strerror(-ret);\n+\n+\tret = ::ioctl(requestFd, MEDIA_REQUEST_IOC_REINIT, NULL);\n+\tif (ret)\n+\t\tLOG(MediaDevice, Error) << \"The request \" << requestFd\n+\t\t\t\t\t<< \" is queued but not yet completed: \"\n+\t\t\t\t\t<< strerror(-ret);\n+\n+\treturn ret;\n+}\n+\n } /* namespace libcamera */\n", "prefixes": [ "1/1" ] }