[v5,17/18] media: Documentation: add Intel IPU6 ISYS driver admin-guide doc

Message ID	20240425214809.930227-18-sakari.ailus@linux.intel.com
State	Superseded
Headers	show Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57D4C15624C for <linux-media@vger.kernel.org>; Thu, 25 Apr 2024 21:49:04 +0000 (UTC) From: Sakari Ailus <sakari.ailus@linux.intel.com> To: linux-media@vger.kernel.org Cc: bingbu.cao@intel.com, laurent.pinchart@ideasonboard.com, andriy.shevchenko@linux.intel.com, hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com, claus.stovgaard@gmail.com, tomi.valkeinen@ideasonboard.com, tfiga@chromium.org, senozhatsky@chromium.org, andreaskleist@gmail.com, bingbu.cao@linux.intel.com, tian.shu.qiu@intel.com, hongju.wang@intel.com Subject: [PATCH v5 17/18] media: Documentation: add Intel IPU6 ISYS driver admin-guide doc Date: Fri, 26 Apr 2024 00:48:08 +0300 Message-Id: <20240425214809.930227-18-sakari.ailus@linux.intel.com> In-Reply-To: <20240425214809.930227-1-sakari.ailus@linux.intel.com> References: <20240425214809.930227-1-sakari.ailus@linux.intel.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Intel IPU6 and IPU6 input system drivers \| expand [v5,00/18,v4,00/19] Intel IPU6 and IPU6 input system drivers [v5,01/18] media: ipu6: Add PCI device table header [v5,02/18] media: ivsc: csi: Use IPU bridge [v5,03/18] media: intel/ipu6: add Intel IPU6 PCI device driver [v5,04/18] media: intel/ipu6: add IPU auxiliary devices [v5,05/18] media: intel/ipu6: add IPU6 buttress interface driver [v5,06/18] media: intel/ipu6: CPD parsing for get firmware components [v5,07/18] media: intel/ipu6: add IPU6 DMA mapping API and MMU table [v5,08/18] media: intel/ipu6: add syscom interfaces between firmware and driver [v5,09/18] media: intel/ipu6: input system ABI between firmware and driver [v5,10/18] media: intel/ipu6: add IPU6 CSI2 receiver v4l2 sub-device [v5,11/18] media: intel/ipu6: add the CSI2 DPHY implementation [v5,12/18] media: intel/ipu6: input system video nodes and buffer queues [v5,13/18] media: intel/ipu6: add the main input system driver [v5,14/18] media: intel/ipu6: add Kconfig and Makefile [v5,15/18] media: MAINTAINERS: add maintainers for Intel IPU6 input system driver [v5,16/18] media: intel/ipu6: support line-based metadata capture support [v5,17/18] media: Documentation: add Intel IPU6 ISYS driver admin-guide doc [v5,18/18] media: Documentation: add documentation of Intel IPU6 driver and hardware overview

diff --git a/Documentation/admin-guide/media/ipu6-isys.rst b/Documentation/admin-guide/media/ipu6-isys.rst new file mode 100644 index 000000000000..0721e920b5e6 --- /dev/null +++ b/Documentation/admin-guide/media/ipu6-isys.rst @@ -0,0 +1,161 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. include:: <isonum.txt> + +======================================================== +Intel Image Processing Unit 6 (IPU6) Input System driver +======================================================== + +Copyright |copy| 2023--2024 Intel Corporation + +Introduction +============ + +This file documents the Intel IPU6 (6th generation Image Processing Unit) +Input System (MIPI CSI2 receiver) drivers located under +drivers/media/pci/intel/ipu6. + +The Intel IPU6 can be found in certain Intel SoCs but not in all SKUs: + +* Tiger Lake +* Jasper Lake +* Alder Lake +* Raptor Lake +* Meteor Lake + +Intel IPU6 is made up of two components - Input System (ISYS) and Processing +System (PSYS). + +The Input System mainly works as MIPI CSI-2 receiver which receives and +processes the image data from the sensors and outputs the frames to memory. + +There are 2 driver modules - intel-ipu6 and intel-ipu6-isys. intel-ipu6 is an +IPU6 common driver which does PCI configuration, firmware loading and parsing, +firmware authentication, DMA mapping and IPU-MMU (internal Memory mapping Unit) +configuration. intel_ipu6_isys implements V4L2, Media Controller and V4L2 +sub-device interfaces. The IPU6 ISYS driver supports camera sensors connected +to the IPU6 ISYS through V4L2 sub-device sensor drivers. + +.. Note:: See Documentation/driver-api/media/drivers/ipu6.rst for more + information about the IPU6 hardware. + +Input system driver +=================== + +The Input System driver mainly configures CSI-2 D-PHY, constructs the firmware +stream configuration, sends commands to firmware, gets response from hardware +and firmware and then returns buffers to user. The ISYS is represented as +several V4L2 sub-devices as well as video nodes. + +.. kernel-figure:: ipu6_isys_graph.svg + :alt: ipu6 isys media graph with multiple streams support + + IPU6 ISYS media graph with multiple streams support + +The graph has been produced using the following command: + +.. code-block:: none + + fdp -Gsplines=true -Tsvg < dot > dot.svg + +Capturing frames with IPU6 ISYS +------------------------------- + +IPU6 ISYS is used to capture frames from the camera sensors connected to the +CSI2 ports. The supported input formats of ISYS are listed in table below: + +.. tabularcolumns:: |p{0.8cm}|p{4.0cm}|p{4.0cm}| + +.. flat-table:: + :header-rows: 1 + + * - IPU6 ISYS supported input formats + + * - RGB565, RGB888 + + * - UYVY8, YUYV8 + + * - RAW8, RAW10, RAW12 + +.. _ipu6_isys_capture_examples: + +Examples +~~~~~~~~ + +Here is an example of IPU6 ISYS raw capture on Dell XPS 9315 laptop. On this +machine, ov01a10 sensor is connected to IPU ISYS CSI-2 port 2, which can +generate images at sBGGR10 with resolution 1280x800. + +Using the media controller APIs, we can configure ov01a10 sensor by +media-ctl [#f1]_ and yavta [#f2]_ to transmit frames to IPU6 ISYS. + +.. code-block:: none + + # Example 1 capture frame from ov01a10 camera sensor + # This example assumes /dev/media0 as the IPU ISYS media device + export MDEV=/dev/media0 + + # Establish the link for the media devices using media-ctl + media-ctl -d $MDEV -l "\"ov01a10 3-0036\":0 -> \"Intel IPU6 CSI2 2\":0[1]" + + # Set the format for the media devices + media-ctl -d $MDEV -V "ov01a10:0 [fmt:SBGGR10/1280x800]" + media-ctl -d $MDEV -V "Intel IPU6 CSI2 2:0 [fmt:SBGGR10/1280x800]" + media-ctl -d $MDEV -V "Intel IPU6 CSI2 2:1 [fmt:SBGGR10/1280x800]" + +Once the media pipeline is configured, desired sensor specific settings +(such as exposure and gain settings) can be set, using the yavta tool. + +e.g + +.. code-block:: none + + # and that ov01a10 sensor is connected to i2c bus 3 with address 0x36 + export SDEV=$(media-ctl -d $MDEV -e "ov01a10 3-0036") + + yavta -w 0x009e0903 400 $SDEV + yavta -w 0x009e0913 1000 $SDEV + yavta -w 0x009e0911 2000 $SDEV + +Once the desired sensor settings are set, frame captures can be done as below. + +e.g + +.. code-block:: none + + yavta --data-prefix -u -c10 -n5 -I -s 1280x800 --file=/tmp/frame-#.bin \ + -f SBGGR10 $(media-ctl -d $MDEV -e "Intel IPU6 ISYS Capture 0") + +With the above command, 10 frames are captured at 1280x800 resolution with +sBGGR10 format. The captured frames are available as /tmp/frame-#.bin files. + +Here is another example of IPU6 ISYS RAW and metadata capture from camera +sensor ov2740 on Lenovo X1 Yoga laptop. + +.. code-block:: none + + media-ctl -l "\"ov2740 14-0036\":0 -> \"Intel IPU6 CSI2 1\":0[1]" + media-ctl -l "\"Intel IPU6 CSI2 1\":1 -> \"Intel IPU6 ISYS Capture 0\":0[5]" + media-ctl -l "\"Intel IPU6 CSI2 1\":2 -> \"Intel IPU6 ISYS Capture 1\":0[5]" + + # set routing + media-ctl -v -R "\"Intel IPU6 CSI2 1\" [0/0->1/0[1],0/1->2/1[1]]" + + media-ctl -v "\"Intel IPU6 CSI2 1\":0/0 [fmt:SGRBG10/1932x1092]" + media-ctl -v "\"Intel IPU6 CSI2 1\":0/1 [fmt:GENERIC_8/97x1]" + media-ctl -v "\"Intel IPU6 CSI2 1\":1/0 [fmt:SGRBG10/1932x1092]" + media-ctl -v "\"Intel IPU6 CSI2 1\":2/1 [fmt:GENERIC_8/97x1]" + + CAPTURE_DEV=$(media-ctl -e "Intel IPU6 ISYS Capture 0") + ./yavta --data-prefix -c100 -n5 -I -s1932x1092 --file=/tmp/frame-#.bin \ + -f SGRBG10 ${CAPTURE_DEV} + + CAPTURE_META=$(media-ctl -e "Intel IPU6 ISYS Capture 1") + ./yavta --data-prefix -c100 -n5 -I -s97x1 -B meta-capture \ + --file=/tmp/meta-#.bin -f GENERIC_8 ${CAPTURE_META} + +References +========== + +.. [#f1] https://git.ideasonboard.org/media-ctl.git +.. [#f2] https://git.ideasonboard.org/yavta.git diff --git a/Documentation/admin-guide/media/ipu6_isys_graph.svg b/Documentation/admin-guide/media/ipu6_isys_graph.svg new file mode 100644 index 000000000000..c8539ef320d2 --- /dev/null +++ b/Documentation/admin-guide/media/ipu6_isys_graph.svg @@ -0,0 +1,548 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" + "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> + + +<svg width="1703pt" height="1473pt" + viewBox="0.00 0.00 1703.00 1473.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> +<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 1469)"> +<title>board</title> +<polygon fill="white" stroke="transparent" points="-4,4 -4,-1469 1699,-1469 1699,4 -4,4"/> + +<g id="node1" class="node"> +<title>n00000001</title> +<polygon fill="yellow" stroke="black" points="832.99,-750.08 629.99,-750.08 629.99,-712.08 832.99,-712.08 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b/Documentation/admin-guide/media/v4l-drivers.rst index f4bb2605f07e..4120eded9a13 100644 --- a/Documentation/admin-guide/media/v4l-drivers.rst +++ b/Documentation/admin-guide/media/v4l-drivers.rst @@ -16,6 +16,7 @@ Video4Linux (V4L) driver-specific documentation imx imx7 ipu3 + ipu6-isys ivtv mgb4 omap3isp

[v5,17/18] media: Documentation: add Intel IPU6 ISYS driver admin-guide doc

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