From: Bingbu Cao <bingbu.cao@xxxxxxxxx>
This document mainly describe the functionality of IPU6 and IPU6 isys
driver, and gives an example that how user can do imaging capture with
tools.
Signed-off-by: Bingbu Cao <bingbu.cao@xxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
Documentation/admin-guide/media/ipu6-isys.rst | 161 +++++
.../admin-guide/media/ipu6_isys_graph.svg | 548 ++++++++++++++++++
.../admin-guide/media/v4l-drivers.rst | 1 +
3 files changed, 710 insertions(+)
create mode 100644 Documentation/admin-guide/media/ipu6-isys.rst
create mode 100644 Documentation/admin-guide/media/ipu6_isys_graph.svg
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 @@
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+<text text-anchor="middle" x="1123.89" y="-8.12" font-family="Times,serif" font-size="14.00">/dev/video30</text>
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+<!-- n0000007d -->
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+<text text-anchor="middle" x="1496.62" y="-21.19" font-family="Times,serif" font-size="14.00">/dev/video31</text>
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+<!-- n00000081 -->
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+<!-- n00000081->n00000005 -->
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+<!-- n00000081->n00000009 -->
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+<!-- n00000081->n0000000d -->
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+<title>n00000081:port4->n0000000d</title>
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+</g>
+<!-- n00000081->n00000011 -->
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+<title>n00000081:port5->n00000011</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M1029.19,-700.26C1029.19,-700.26 1115.28,-690.56 1123.48,-697.08 1198.37,-756.64 1190.55,-886.51 1182.64,-944.71"/>
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+</g>
+<!-- n00000081->n00000015 -->
+<g id="edge6" class="edge">
+<title>n00000081:port6->n00000015</title>
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+<!-- n00000081->n00000019 -->
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+<title>n00000081:port7->n00000019</title>
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+<!-- n00000081->n0000001d -->
+<g id="edge8" class="edge">
+<title>n00000081:port8->n0000001d</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M1107.28,-700.28C1107.28,-700.28 1119.29,-696.23 1121.72,-693.67 1159.76,-653.62 1177.38,-589.6 1184.78,-552.46"/>
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+<!-- n0000008b -->
+<g id="node34" class="node">
+<title>n0000008b</title>
+<path fill="green" stroke="black" d="M293.1,-532.08C293.1,-532.08 477.1,-532.08 477.1,-532.08 483.1,-532.08 489.1,-538.08 489.1,-544.08 489.1,-544.08 489.1,-604.08 489.1,-604.08 489.1,-610.08 483.1,-616.08 477.1,-616.08 477.1,-616.08 293.1,-616.08 293.1,-616.08 287.1,-616.08 281.1,-610.08 281.1,-604.08 281.1,-604.08 281.1,-544.08 281.1,-544.08 281.1,-538.08 287.1,-532.08 293.1,-532.08"/>
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+<!-- n0000008b->n00000025 -->
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+<!-- n0000008b->n00000029 -->
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+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M346.1,-532.08C346.1,-532.08 333.93,-527.96 318.37,-522.71"/>
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+<!-- n0000008b->n0000002d -->
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+<title>n0000008b:port4->n0000002d</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M372.19,-532.05C372.19,-532.05 292.97,-514.3 277.9,-528.88 249.01,-556.8 253.16,-587.62 277.9,-619.28 278.34,-619.85 280.33,-620.69 283.45,-621.71"/>
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+<!-- n0000008b->n00000031 -->
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+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M398,-532.05C398,-532.05 476.28,-515.34 492.3,-528.88 568.49,-593.29 550.55,-729.67 538.14,-789.41"/>
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+<!-- n0000008b->n00000035 -->
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+<!-- n0000008b->n00000039 -->
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+<!-- n0000008b->n0000003d -->
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+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M476.1,-532.08C476.1,-532.08 522.37,-522.39 526.85,-518.65 563.15,-488.33 581.38,-434.52 589.6,-401.2"/>
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+<!-- n00000095 -->
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+<!-- n00000095->n00000045 -->
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+<!-- n00000095->n00000049 -->
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+<!-- n00000095->n0000004d -->
+<g id="edge20" class="edge">
+<title>n00000095:port4->n0000004d</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M380.47,-1180.09C380.47,-1180.09 293.71,-1169.63 286.18,-1176.91 257.29,-1204.84 262.63,-1234.76 286.18,-1267.31 288.16,-1270.05 297.33,-1273.96 309.38,-1278.13"/>
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+<!-- n00000095->n00000051 -->
+<g id="edge21" class="edge">
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+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M406.28,-1180.09C406.28,-1180.09 492.13,-1170.7 500.58,-1176.91 576.41,-1232.66 579.83,-1358.79 577.09,-1416.2"/>
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+<!-- n00000095->n00000055 -->
+<g id="edge22" class="edge">
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+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M432.28,-1180.11C432.28,-1180.11 292.85,-1172.29 286.18,-1176.91 211.26,-1228.86 198.3,-1348.49 196.45,-1404.12"/>
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+<!-- n00000095->n00000059 -->
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diff --git a/Documentation/admin-guide/media/v4l-drivers.rst 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
--
2.39.2
