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{ "id": 15159, "url": "https://patchwork.libcamera.org/api/1.1/patches/15159/?format=api", "web_url": "https://patchwork.libcamera.org/patch/15159/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/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": "<20211213232849.40071-5-djrscally@gmail.com>", "date": "2021-12-13T23:28:48", "name": "[libcamera-devel,4/5] media: entity: Add support for ancillary links", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "ae62b88beb2c57f04753cd21dd3505a31a0eb9a0", "submitter": { "id": 90, "url": "https://patchwork.libcamera.org/api/1.1/people/90/?format=api", "name": "Daniel Scally", "email": "djrscally@gmail.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/15159/mbox/", "series": [ { "id": 2843, "url": "https://patchwork.libcamera.org/api/1.1/series/2843/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2843", "date": "2021-12-13T23:28:44", "name": "Introduce ancillary links", "version": 1, "mbox": "https://patchwork.libcamera.org/series/2843/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/15159/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/15159/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 1CE5AC3258\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 13 Dec 2021 23:29:12 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A016D60876;\n\tTue, 14 Dec 2021 00:29:11 +0100 (CET)", "from mail-wr1-x431.google.com (mail-wr1-x431.google.com\n\t[IPv6:2a00:1450:4864:20::431])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id ACF2660822\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 14 Dec 2021 00:29:08 +0100 (CET)", "by mail-wr1-x431.google.com with SMTP id v11so29606622wrw.10\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 13 Dec 2021 15:29:08 -0800 (PST)", "from localhost.localdomain\n\t(cpc141996-chfd3-2-0-cust928.12-3.cable.virginm.net. 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"linux-media@vger.kernel.org,\n\tlibcamera-devel@lists.libcamera.org", "Date": "Mon, 13 Dec 2021 23:28:48 +0000", "Message-Id": "<20211213232849.40071-5-djrscally@gmail.com>", "X-Mailer": "git-send-email 2.25.1", "In-Reply-To": "<20211213232849.40071-1-djrscally@gmail.com>", "References": "<20211213232849.40071-1-djrscally@gmail.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH 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 and destroy ancillary links, so that they\ndon't need to be manually created by users.\n\nSigned-off-by: Daniel Scally <djrscally@gmail.com>\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 | 30 ++++++++++++++++++++++++++++++\n include/media/media-entity.h | 29 +++++++++++++++++++++++++++++\n 2 files changed, 59 insertions(+)", "diff": "diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c\nindex aeddc3f6310e..4e39e100ea03 100644\n--- a/drivers/media/mc/mc-entity.c\n+++ b/drivers/media/mc/mc-entity.c\n@@ -1052,3 +1052,33 @@ 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+\t\t\t\t\t u32 flags)\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 = flags | MEDIA_LNK_FL_ANCILLARY_LINK;\n+\n+\t/* Initialize graph object embedded at 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);\n+\n+void media_remove_ancillary_link(struct media_link *link)\n+{\n+\tlist_del(&link->list);\n+\tmedia_gobj_destroy(&link->graph_obj);\n+\tkfree(link);\n+}\n+EXPORT_SYMBOL_GPL(media_remove_ancillary_link);\ndiff --git a/include/media/media-entity.h b/include/media/media-entity.h\nindex fea489f03d57..f7b1738cef88 100644\n--- a/include/media/media-entity.h\n+++ b/include/media/media-entity.h\n@@ -1104,6 +1104,35 @@ void media_remove_intf_links(struct media_interface *intf);\n * it will issue a call to @operation\\(@entity, @args\\).\n */\n \n+/**\n+ * media_create_ancillary_link() - creates a link between two entities\n+ *\n+ * @primary:\tpointer to the primary &media_entity\n+ * @ancillary:\tpointer to the ancillary &media_entity\n+ * @flags:\tLink flags, as defined in\n+ *\t\t:ref:`include/uapi/linux/media.h <media_header>`\n+ *\t\t( seek for ``MEDIA_LNK_FL_*``)\n+ *\n+ *\n+ * Valid values for flags:\n+ *\n+ * %MEDIA_LNK_FL_ENABLED\n+ * Indicates that the two entities are connected pieces of hardware that form\n+ * a single logical unit.\n+ *\n+ * A typical example is a camera lens being linked to the sensor that it is\n+ * supporting.\n+ *\n+ * %MEDIA_LNK_FL_IMMUTABLE\n+ * Indicates that the link enabled state can't be modified at runtime. If\n+ * %MEDIA_LNK_FL_IMMUTABLE is set, then %MEDIA_LNK_FL_ENABLED must also be\n+ * set, since an immutable link is always enabled.\n+ */\n+struct media_link *\n+media_create_ancillary_link(struct media_entity *primary,\n+\t\t\t struct media_entity *ancillary,\n+\t\t\t u32 flags);\n+\n #define media_entity_call(entity, operation, args...)\t\t\t\\\n \t(((entity)->ops && (entity)->ops->operation) ?\t\t\t\\\n \t (entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD)\n", "prefixes": [ "libcamera-devel", "4/5" ] }