{"id":11017,"url":"https://patchwork.libcamera.org/api/patches/11017/?format=json","web_url":"https://patchwork.libcamera.org/patch/11017/","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":"<20210126173008.446321-2-jacopo@jmondi.org>","date":"2021-01-26T17:30:03","name":"[libcamera-devel,v2,1/6] libcamera: camera_sensor: Make VBLANK mandatory","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"de015c3f7f6774f9259f31b8bcbbf5c6774d377f","submitter":{"id":3,"url":"https://patchwork.libcamera.org/api/people/3/?format=json","name":"Jacopo Mondi","email":"jacopo@jmondi.org"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/11017/mbox/","series":[{"id":1612,"url":"https://patchwork.libcamera.org/api/series/1612/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1612","date":"2021-01-26T17:30:02","name":"android: Report frame durations","version":2,"mbox":"https://patchwork.libcamera.org/series/1612/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/11017/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/11017/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 6C1FBBD808\n\tfor ;\n\tTue, 26 Jan 2021 17:29:57 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id C634B6832A;\n\tTue, 26 Jan 2021 18:29:55 +0100 (CET)","from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net\n\t[217.70.183.196])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 8D90868318\n\tfor ;\n\tTue, 26 Jan 2021 18:29:53 +0100 (CET)","from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233])\n\t(Authenticated sender: jacopo@jmondi.org)\n\tby relay4-d.mail.gandi.net (Postfix) with ESMTPSA id 59E95E0002\n\tfor ;\n\tTue, 26 Jan 2021 17:29:53 +0000 (UTC)"],"X-Originating-IP":"93.34.118.233","From":"Jacopo Mondi ","To":"libcamera-devel@lists.libcamera.org","Date":"Tue, 26 Jan 2021 18:30:03 +0100","Message-Id":"<20210126173008.446321-2-jacopo@jmondi.org>","X-Mailer":"git-send-email 2.30.0","In-Reply-To":"<20210126173008.446321-1-jacopo@jmondi.org>","References":"<20210126173008.446321-1-jacopo@jmondi.org>","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH v2 1/6] libcamera: camera_sensor: Make\n\tVBLANK mandatory","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","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Add the V4L2_CID_VBLANK control to the list of mandatory controls\nthe sensor driver has to report and document the new requirement.\n\nThe vertical blanking control is used to calculate the frame duration.\n\nSigned-off-by: Jacopo Mondi \n---\n Documentation/sensor_driver_requirements.rst | 6 ++++--\n src/libcamera/camera_sensor.cpp | 1 +\n 2 files changed, 5 insertions(+), 2 deletions(-)","diff":"diff --git a/Documentation/sensor_driver_requirements.rst b/Documentation/sensor_driver_requirements.rst\nindex 6dcd4e68d64d..590797f054ce 100644\n--- a/Documentation/sensor_driver_requirements.rst\n+++ b/Documentation/sensor_driver_requirements.rst\n@@ -27,18 +27,20 @@ The sensor driver shall support the following V4L2 controls:\n * `V4L2_CID_EXPOSURE`_\n * `V4L2_CID_HBLANK`_\n * `V4L2_CID_PIXEL_RATE`_\n+* `V4L2_CID_VBLANK`_\n \n .. _V4L2_CID_EXPOSURE: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/control.html\n .. _V4L2_CID_HBLANK: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-image-source.html\n .. _V4L2_CID_PIXEL_RATE: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-image-process.html\n+.. _V4L2_CID_VBLANK: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-image-source.html\n \n While V4L2 doesn't specify a unit for the `EXPOSURE` control, libcamera requires\n it to be expressed as a number of image lines. Camera sensor drivers that do not\n comply with this requirement will need to be adapted or will produce incorrect\n results.\n \n-The `HBLANK` and `PIXEL_RATE` controls are used to compute the sensor output\n-timings.\n+The `HBLANK`, `PIXEL_RATE` and `VBLANK` controls are used to compute the sensor\n+output timings.\n \n Optional Requirements\n ---------------------\ndiff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp\nindex ca33c0094088..ab315bdc468c 100644\n--- a/src/libcamera/camera_sensor.cpp\n+++ b/src/libcamera/camera_sensor.cpp\n@@ -244,6 +244,7 @@ int CameraSensor::validateSensorDriver()\n \t\tV4L2_CID_EXPOSURE,\n \t\tV4L2_CID_HBLANK,\n \t\tV4L2_CID_PIXEL_RATE,\n+\t\tV4L2_CID_VBLANK,\n \t};\n \n \tControlList ctrls = subdev_->getControls(mandatoryControls);\n","prefixes":["libcamera-devel","v2","1/6"]}