{"id":25347,"url":"https://patchwork.libcamera.org/api/patches/25347/?format=json","web_url":"https://patchwork.libcamera.org/patch/25347/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/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":"<20251203-rzv2h-pre-v3-4-1493e0638626@ideasonboard.com>","date":"2025-12-03T09:14:24","name":"[v3,4/4] libcamera: V4L2Subdevice: Get device by regexp","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"9852434e712ab8c5b34f8b6097cbef0fca57c5eb","submitter":{"id":143,"url":"https://patchwork.libcamera.org/api/people/143/?format=json","name":"Jacopo Mondi","email":"jacopo.mondi@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/25347/mbox/","series":[{"id":5634,"url":"https://patchwork.libcamera.org/api/series/5634/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5634","date":"2025-12-03T09:14:20","name":"Use regular expressions for entity name matching","version":3,"mbox":"https://patchwork.libcamera.org/series/5634/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/25347/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/25347/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 F0ECFC32AF\n\tfor ;\n\tWed, 3 Dec 2025 09:14:48 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 1511A60F4A;\n\tWed, 3 Dec 2025 10:14:47 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id AC6EC60D39\n\tfor ;\n\tWed, 3 Dec 2025 10:14:42 +0100 (CET)","from [192.168.1.104] (net-93-65-100-155.cust.vodafonedsl.it\n\t[93.65.100.155])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id F2EC71787;\n\tWed, 3 Dec 2025 10:12:27 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"X69rBGA+\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1764753148;\n\tbh=hjahXNah1RbuUiN7aDtizRrX6Ko4xbWUknSuL9r6v+8=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=X69rBGA+WjyDyMzRgsncfA69F6ddE6XKC7Vve2XTjtA/yCdKnX7UhT1ivyitT2VmU\n\tVzOUR68lK64KdZyEjbvfW7O/V31TJpiQubQ6i93x4yUfe8KYXhF2Tq1VSebgbhnSek\n\tf9g0L/AIBijP9gt9DYCE7B5SNnn+HfrwHR6IUE44=","From":"Jacopo Mondi ","Date":"Wed, 03 Dec 2025 10:14:24 +0100","Subject":"[PATCH v3 4/4] libcamera: V4L2Subdevice: Get device by regexp","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20251203-rzv2h-pre-v3-4-1493e0638626@ideasonboard.com>","References":"<20251203-rzv2h-pre-v3-0-1493e0638626@ideasonboard.com>","In-Reply-To":"<20251203-rzv2h-pre-v3-0-1493e0638626@ideasonboard.com>","To":"Daniel Scally , \n\tlibcamera-devel@lists.libcamera.org","Cc":"Jacopo Mondi , \n\tStefan Klug ","X-Mailer":"b4 0.14.2","X-Developer-Signature":"v=1; a=openpgp-sha256; l=3442;\n\ti=jacopo.mondi@ideasonboard.com; h=from:subject:message-id;\n\tbh=af7m13ES9de6oF4m50q/afkIeXZbh+NVBRixZ9gOgRE=;\n\tb=owEBbQKS/ZANAwAKAXI0Bo8WoVY8AcsmYgBpL/+ACEUPXWu3eN5Kk0rj7Kzi4bh3LUhhBXyjr\n\t8rLmGvias2JAjMEAAEKAB0WIQS1xD1IgJogio9YOMByNAaPFqFWPAUCaS//gAAKCRByNAaPFqFW\n\tPKdoD/9j0IBsLPuGMzARAdbpzUapEyYt+ezgRqu0sL8CjSDcx8t6tH+OsyZCDKtmfxf/8FSwj5F\n\tA2EnZDnKfDsmfFKr+aTbF1Xwca96kVCEKDK6Do/6FeaW3RaY2tWPieIoCATTfEQWeejaIm1xrPv\n\twSnxJ0J7nOkXrcwKj9F9dEnp/orp0cYWxcfDpGdf139fRsfwpoqKPw8MhijEa3UWSkCi+1FaTtS\n\tjHNVBxIA/AqADq29kivVFZxlHJEgTJ7VLhNwXCvf3vJwC0rtAFKVriW2tqgHciGNbmgg7WbXlbc\n\t1wLwbVNN+VScJHtvUHc23mlxzlrLvbft2i3j+jsa4xIQhVzfArE6mXDmnz8z4NxrIuxpOCqL6lk\n\txoK6YtcNWZGoxfkTd8k9ofvNTPrZZ5efAkCZlDSDR8h8eopwb4CNrVvqvN8bmEK++1ZxPdGKhAu\n\tsRNFnwnbhQC+RH4lji5FTXXG/ZsOc9IaPPv1+zZa5AZ6+gd2SJUG3y/Cs6OMbCdyUQNQSyIuxWw\n\tTQg55/5/I0rhn1TdGuhQWAuCF5yw5xJSL3pxQZ2iPRuNucbHBeKi2OXltMaJQ1PvqVglaAuBOkL\n\tt/rLJkVmhH5g6WM7VBYaWmWO1XCnlP3bf4I6ifjPajfYvMQbblapqt2AzeyumqHVbX8eRChvQ0V\n\tTXsewSDtzpJI9sg==","X-Developer-Key":"i=jacopo.mondi@ideasonboard.com; a=openpgp;\n\tfpr=72392EDC88144A65C701EA9BA5826A2587AD026B","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","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"From: Daniel Scally \n\nSome kernel drivers give their entities names that will differ from\nimplementation to implementation; for example the drivers for the\nCamera Receiver Unit and CSI-2 receiver in the RZ/V2H(P) SoC give their\nentities names that include their memory address, in the format\n\"csi-16000400.csi2\". Passing that entity name to\nV4L2Subdevice::fromEntityName() is too inflexible given it would only\nthen work if that specific CSI-2 receiver were the one being used.\n\nAdd an overload for V4L2Subdevice::fromEntityName() to instead allow\nusers to pass a std::basic_regex, and use std::regex_search() instead\nof a direct string comparison to find a matching entity. Ths allows\nus to form regular expressions like \"csi-[0-9a-f]{8}.csi2\" to find\nthe entities.\n\nSigned-off-by: Daniel Scally \nReviewed-by: Stefan Klug \nReviewed-by: Jacopo Mondi \nSigned-off-by: Jacopo Mondi \n---\n include/libcamera/internal/v4l2_subdevice.h | 3 +++\n src/libcamera/v4l2_subdevice.cpp | 19 ++++++++++++++++++-\n 2 files changed, 21 insertions(+), 1 deletion(-)","diff":"diff --git a/include/libcamera/internal/v4l2_subdevice.h b/include/libcamera/internal/v4l2_subdevice.h\nindex c1cde1df2e369101eee7ff351f14f81098ec597b..c37a82afa881db9566fa7a0bd8dbdfb0e9f029e8 100644\n--- a/include/libcamera/internal/v4l2_subdevice.h\n+++ b/include/libcamera/internal/v4l2_subdevice.h\n@@ -18,6 +18,7 @@\n \n #include \n #include \n+#include \n \n #include \n #include \n@@ -163,6 +164,8 @@ public:\n \n \tstatic std::unique_ptr\n \tfromEntityName(const MediaDevice *media, const std::string &entity);\n+\tstatic std::unique_ptr\n+\tfromEntityName(const MediaDevice *media, const std::regex &entity);\n \n protected:\n \tstd::string logPrefix() const override;\ndiff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp\nindex b75edffe762155e428e039b4884bed3d469ba751..199424600f582b918e7daa5b77fbec426c8b408c 100644\n--- a/src/libcamera/v4l2_subdevice.cpp\n+++ b/src/libcamera/v4l2_subdevice.cpp\n@@ -1748,7 +1748,6 @@ const std::string &V4L2Subdevice::model()\n * \\a media\n * \\param[in] media The media device where the entity is registered\n * \\param[in] entity The media entity name\n- *\n * \\return A newly created V4L2Subdevice on success, nullptr otherwise\n */\n std::unique_ptr\n@@ -1762,6 +1761,24 @@ V4L2Subdevice::fromEntityName(const MediaDevice *media,\n \treturn std::make_unique(mediaEntity);\n }\n \n+/**\n+ * \\brief Create a new video subdevice instance from an entity in media device\n+ * \\a media\n+ * \\param[in] media The media device where the entity is registered\n+ * \\param[in] entity A regex that will match the media entity's name\n+ * \\return A newly created V4L2Subdevice on success, nullptr otherwise\n+ */\n+std::unique_ptr\n+V4L2Subdevice::fromEntityName(const MediaDevice *media,\n+\t\t\t const std::regex &entity)\n+{\n+\tMediaEntity *mediaEntity = media->getEntityByName(entity);\n+\tif (!mediaEntity)\n+\t\treturn nullptr;\n+\n+\treturn std::make_unique(mediaEntity);\n+}\n+\n std::string V4L2Subdevice::logPrefix() const\n {\n \treturn \"'\" + entity_->name() + \"'\";\n","prefixes":["v3","4/4"]}