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{ "id": 15401, "url": "https://patchwork.libcamera.org/api/patches/15401/?format=api", "web_url": "https://patchwork.libcamera.org/patch/15401/", "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": "<20220302220304.1327896-5-djrscally@gmail.com>", "date": "2022-03-02T22:03:03", "name": "[libcamera-devel,v3,4/5] media: entity: Add support for ancillary links", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "7abbe8933858235807a74fe124c6b3fc7a7c13b2", "submitter": { "id": 90, "url": "https://patchwork.libcamera.org/api/people/90/?format=api", "name": "Daniel Scally", "email": "djrscally@gmail.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/15401/mbox/", "series": [ { "id": 2946, "url": "https://patchwork.libcamera.org/api/series/2946/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2946", "date": "2022-03-02T22:02:59", "name": "Introduce ancillary links", "version": 3, "mbox": "https://patchwork.libcamera.org/series/2946/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/15401/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/15401/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 244EEC3261\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 2 Mar 2022 22:03:21 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 31B956117D;\n\tWed, 2 Mar 2022 23:03:20 +0100 (CET)", "from mail-wr1-x436.google.com (mail-wr1-x436.google.com\n\t[IPv6:2a00:1450:4864:20::436])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 0E4226116B\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 2 Mar 2022 23:03:18 +0100 (CET)", "by mail-wr1-x436.google.com with SMTP id u1so4882698wrg.11\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 02 Mar 2022 14:03:18 -0800 (PST)", "from localhost.localdomain\n\t(cpc141996-chfd3-2-0-cust928.12-3.cable.virginm.net. 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<djrscally@gmail.com>", "To": "linux-media@vger.kernel.org,\n\tlibcamera-devel@lists.libcamera.org", "Date": "Wed, 2 Mar 2022 22:03:03 +0000", "Message-Id": "<20220302220304.1327896-5-djrscally@gmail.com>", "X-Mailer": "git-send-email 2.25.1", "In-Reply-To": "<20220302220304.1327896-1-djrscally@gmail.com>", "References": "<20220302220304.1327896-1-djrscally@gmail.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v3 4/5] media: entity: Add support for\n\tancillary links", "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>", "Cc": "sakari.ailus@linux.intel.com", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Add functions to create ancillary links, so that they don't need to\nbe manually created by users.\n\nReviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>\nSigned-off-by: Daniel Scally <djrscally@gmail.com>\n---\n\nChanges since v2:\n\n\t- Fixed some typos and comment phrasing (Laurent)\n\t- Changed the position of the new function to go after media_entity_call()\n\t(Laurent)\n\nChanges since v1:\n\n\t- Hardcoded MEDIA_LINK_FL_IMMUTABLE and MEDIA_LINK_FL_ENABLED (Laurent)\n\nChanges since the rfc:\n\n\t- (Laurent) Set gobj0 and gobj1 directly instead of the other union\n\tmembers\n\t- (Laurent) Added MEDIA_LNK_FL_IMMUTABLE to the kerneldoc for the new\n\tcreate function\n\n drivers/media/mc/mc-entity.c | 22 ++++++++++++++++++++++\n include/media/media-entity.h | 19 +++++++++++++++++++\n 2 files changed, 41 insertions(+)", "diff": "diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c\nindex 1a7d0a4fb9e8..d7e2f78a83cc 100644\n--- a/drivers/media/mc/mc-entity.c\n+++ b/drivers/media/mc/mc-entity.c\n@@ -1032,3 +1032,25 @@ void media_remove_intf_links(struct media_interface *intf)\n \tmutex_unlock(&mdev->graph_mutex);\n }\n EXPORT_SYMBOL_GPL(media_remove_intf_links);\n+\n+struct media_link *media_create_ancillary_link(struct media_entity *primary,\n+\t\t\t\t\t struct media_entity *ancillary)\n+{\n+\tstruct media_link *link;\n+\n+\tlink = media_add_link(&primary->links);\n+\tif (!link)\n+\t\treturn ERR_PTR(-ENOMEM);\n+\n+\tlink->gobj0 = &primary->graph_obj;\n+\tlink->gobj1 = &ancillary->graph_obj;\n+\tlink->flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED |\n+\t\t MEDIA_LNK_FL_ANCILLARY_LINK;\n+\n+\t/* Initialize graph object embedded in the new link */\n+\tmedia_gobj_create(primary->graph_obj.mdev, MEDIA_GRAPH_LINK,\n+\t\t\t &link->graph_obj);\n+\n+\treturn link;\n+}\n+EXPORT_SYMBOL_GPL(media_create_ancillary_link);\ndiff --git a/include/media/media-entity.h b/include/media/media-entity.h\nindex fea489f03d57..2a58defc4886 100644\n--- a/include/media/media-entity.h\n+++ b/include/media/media-entity.h\n@@ -1108,4 +1108,23 @@ void media_remove_intf_links(struct media_interface *intf);\n \t(((entity)->ops && (entity)->ops->operation) ?\t\t\t\\\n \t (entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD)\n \n+/**\n+ * media_create_ancillary_link() - create an ancillary link between two\n+ *\t\t\t\t instances of &media_entity\n+ *\n+ * @primary:\tpointer to the primary &media_entity\n+ * @ancillary:\tpointer to the ancillary &media_entity\n+ *\n+ * Create an ancillary link between two entities, indicating that they\n+ * represent two connected pieces of hardware that form a single logical unit.\n+ * A typical example is a camera lens controller being linked to the sensor that\n+ * it is supporting.\n+ *\n+ * The function sets both MEDIA_LNK_FL_ENABLED and MEDIA_LNK_FL_IMMUTABLE for\n+ * the new link.\n+ */\n+struct media_link *\n+media_create_ancillary_link(struct media_entity *primary,\n+\t\t\t struct media_entity *ancillary);\n+\n #endif\n", "prefixes": [ "libcamera-devel", "v3", "4/5" ] }