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{ "id": 9218, "url": "https://patchwork.libcamera.org/api/patches/9218/?format=api", "web_url": "https://patchwork.libcamera.org/patch/9218/", "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": "<20200805105721.15445-3-jacopo@jmondi.org>", "date": "2020-08-05T10:57:19", "name": "[libcamera-devel,2/4] media: docs: Describe targets for sensor properties", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "48edadb2a9c986d75cfafbb122853a7438606611", "submitter": { "id": 3, "url": "https://patchwork.libcamera.org/api/people/3/?format=api", "name": "Jacopo Mondi", "email": "jacopo@jmondi.org" }, "delegate": { "id": 15, "url": "https://patchwork.libcamera.org/api/users/15/?format=api", "username": "jmondi", "first_name": "Jacopo", "last_name": "Mondi", "email": "jacopo@jmondi.org" }, "mbox": "https://patchwork.libcamera.org/patch/9218/mbox/", "series": [ { "id": 1193, "url": "https://patchwork.libcamera.org/api/series/1193/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=1193", "date": "2020-08-05T10:57:18", "name": "[libcamera-devel,1/4] media: docs: Describe pixel array properties", "version": 1, "mbox": "https://patchwork.libcamera.org/series/1193/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/9218/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/9218/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 E31F1BD87A\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 5 Aug 2020 10:53:55 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id BF03D60597;\n\tWed, 5 Aug 2020 12:53:55 +0200 (CEST)", "from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net\n\t[217.70.183.198])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 2E17C60580\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 5 Aug 2020 12:53:54 +0200 (CEST)", "from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233])\n\t(Authenticated sender: jacopo@jmondi.org)\n\tby relay6-d.mail.gandi.net (Postfix) with ESMTPSA id B35E2C0006;\n\tWed, 5 Aug 2020 10:53:52 +0000 (UTC)" ], "X-Originating-IP": "93.34.118.233", "From": "Jacopo Mondi <jacopo@jmondi.org>", "To": "Hans Verkuil <hverkuil@xs4all.nl>,\n\tSakari Ailus <sakari.ailus@linux.intel.com>,\n\tLaurent Pinchart <laurent.pinchart@ideasonboard.com>", "Date": "Wed, 5 Aug 2020 12:57:19 +0200", "Message-Id": "<20200805105721.15445-3-jacopo@jmondi.org>", "X-Mailer": "git-send-email 2.27.0", "In-Reply-To": "<20200805105721.15445-1-jacopo@jmondi.org>", "References": "<20200805105721.15445-1-jacopo@jmondi.org>", "MIME-Version": "1.0", "Subject": "[libcamera-devel] [PATCH 2/4] media: docs: Describe targets for\n\tsensor properties", "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": "Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>,\n\tlibcamera-devel@lists.libcamera.org,\n\tSowjanya Komatineni <skomatineni@nvidia.com>,\n\tLinux Media Mailing List <linux-media@vger.kernel.org>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Provide a table to describe how the V4L2 selection targets can be used\nto access an image sensor pixel array properties.\n\nReference the table in the sub-device documentation.\n\nSigned-off-by: Jacopo Mondi <jacopo@jmondi.org>\n---\n .../userspace-api/media/v4l/dev-subdev.rst | 4 ++\n .../media/v4l/v4l2-selection-targets.rst | 49 +++++++++++++++++++\n 2 files changed, 53 insertions(+)", "diff": "diff --git a/Documentation/userspace-api/media/v4l/dev-subdev.rst b/Documentation/userspace-api/media/v4l/dev-subdev.rst\nindex c47861dff9b9b..2f7da3832f458 100644\n--- a/Documentation/userspace-api/media/v4l/dev-subdev.rst\n+++ b/Documentation/userspace-api/media/v4l/dev-subdev.rst\n@@ -467,6 +467,10 @@ desired image resolution. If the sub-device driver supports that, userspace\n can set the analog crop rectangle to select which portion of the pixel array\n to read out.\n \n+A description of each of the above mentioned targets when used to access the\n+image sensor pixel array properties is provided by\n+:ref:`v4l2-selection-targets-image-sensor-table`\n+\n \n Types of selection targets\n --------------------------\ndiff --git a/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst b/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst\nindex 69f500093aa2a..632e6448b784e 100644\n--- a/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst\n+++ b/Documentation/userspace-api/media/v4l/v4l2-selection-targets.rst\n@@ -76,3 +76,52 @@ of the two interfaces they are used.\n \tmodified by hardware.\n - Yes\n - No\n+\n+\n+.. _v4l2-selection-targets-image-sensor-table:\n+\n+********************************************\n+Selection Targets For Pixel Array Properties\n+********************************************\n+\n+The V4L2 selection API can be used to retrieve the size and disposition of the\n+pixel units that compose and image sensor pixel matrix when applied to a video\n+sub-device that represents an image sensor.\n+\n+A description of the properties associated with each of the sensor pixel array\n+areas is provided by the :ref:`v4l2-subdev-pixel-array-properties` section.\n+\n+.. tabularcolumns:: |p{6.0cm}|p{1.4cm}|p{7.4cm}|p(1.4cm)|\n+\n+.. flat-table:: Selection target definitions\n+ :header-rows: 1\n+ :stub-columns: 0\n+\n+ * - Target name\n+ - id\n+ - Definition\n+ - Read/Write\n+ * - ``V4L2_SEL_TGT_CROP``\n+ - 0x0000\n+ - The analog crop rectangle. Represents the portion of the active pixel\n+ array which is processed to produce images.\n+ - RW\n+ * - ``V4L2_SEL_TGT_CROP_DEFAULT``\n+ - 0x0001\n+ - The active pixel array rectangle. It includes only active pixels and\n+ excludes other ones such as optical black pixels. Its width and height\n+ represent the maximum image resolution an image sensor can produce.\n+ - RO\n+ * - ``V4L2_SEL_TGT_CROP_BOUNDS``\n+ - 0x0002\n+ - The readable portion of the physical pixel array matrix. It includes\n+ pixels that contains valid image data and calibration pixels such as the\n+ optical black ones.\n+ - RO\n+ * - ``V4L2_SEL_TGT_NATIVE_SIZE``\n+ - 0x0003\n+ - The physical pixel array size, including readable and not readable\n+ pixels. As pixels that cannot be read from application processor are not\n+ relevant for calibration purposes, this rectangle is useful to calculate\n+ the physical properties of the image sensor.\n+ - RO\n", "prefixes": [ "libcamera-devel", "2/4" ] }