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feat: Add support for AM62A edgeai docs
Till now the edgeai sdk docs for AM62A are maintained in a bitbucket repository. This commit adds support for building the edgeai docs for AM62A. The edgeai docs can be built similar to processor-sdk-docs but with OS as edgeai. Signed-off-by: Telukula Jeevan Kumar Sahu <[email protected]>
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‎configs/AM62AX/AM62AX_edgeai_config.txt‎

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# General family replacement variables and configuration values for Linux build
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# This file is processed by Python scripts to define both replacement
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# variable and configuration values for a device family build.
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# For replacement variables, all variables should be listed on a single
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# line, and all the variables should be listed on consecutive lines
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# (i.e. no additional blank lines between the replacement variables).
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# Similarly, all the configuration values should be listed on individual,
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# consecutive lines (with no blank linues between the configuration values).
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#
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# Note that neither replacement variables nor configuration values may contain
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# a colon (i.e. ":") in their name. However, values may contain colons.
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Replacement Variables
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---------------------
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'__PART_FAMILY_NAME__' : 'AM62Ax'
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'__PART_FAMILY_DEVICE_NAMES__' : 'AM62Ax'
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'__PRODUCT_LINE_NAME__' : 'Sitara MPU'
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'__SDK_BUILD_MACHINE__' : 'am62a-sk'
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'__SDK_FULL_NAME__' : 'Processor SDK Linux Edge AI AM62Ax'
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'__SDK_SHORT_NAME__' : 'PSDK EdgeAI'
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'__SDK_INSTALL_FILE__' : 'ti-processor-sdk-linux-am62axx-evm-<version>-Linux-x86-Install.bin'
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'__SDK_INSTALL_DIR__' : 'ti-processor-sdk-linux-am62axx-evm-<version>'
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'__SDK_DOWNLOAD_URL__' : '`Processor SDK AM62A Download Page <https://www.ti.com/tool/PROCESSOR-SDK-AM62A>`__'
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'__LINUX_UBUNTU_VERSION_LONG__' : '22.04 (64-bit)'
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'__LINUX_UBUNTU_VERSION_SHORT__' : '22.04'
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'__OPTEE_PLATFORM_FLAVOR__' : 'am62axx'
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'__RTOS_UBUNTU_VERSION_LONG__' : '22.04 (64-bit)'
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'__WINDOWS_SUPPORTED_LONG__' : '10 (64-bit)'
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'__FEATURINGMATRIX__' : \
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'__SYSFW_CORE_NAME__' : 'TIFS'
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Configuration Values
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--------------------
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'CONFIG_part_family' : 'AM62AX_family'
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'CONFIG_part_variant' : 'AM62AX'
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'CONFIG_sdk' : 'PLSDK'
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'CONFIG_icss_support' : 'yes'
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'CONFIG_rt_linux_support' : 'yes'
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'CONFIG_gpu_ip' : 'Rogue_AXE'
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'CONFIG_crypto' : 'sa2ul'
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‎configs/AM62AX/AM62AX_edgeai_tags.py‎

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# Device Family name
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fam_name = 'AM62AX'
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# Project name and HTML title
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sdk_product = 'null' #todo: remove after the new structure is used for all device families
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project = u'Processor SDK Linux Edge AI for AM62Ax'
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html_title = 'Processor SDK AM62Ax Documentation'
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# The master toctree document.
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master_doc = 'devices/AM62AX/edgeai/index'
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# List of patterns, relative to source directory, that match files and
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# directories to ignore when looking for source files.
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# AM62A RTOS docs are not in this project, rather referenced externally,
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# so exclude 'rtos' folder along with others.
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exclude_patterns = ['android', 'example_code', 'files', 'rtos', 'devices/AM335X', 'devices/AM437X', 'devices/AM64X', 'devices/AM65X', 'devices/TDA4VM', 'devices/J7200', 'devices/AM67A', 'devices/AM68A', 'devices/AM69A', 'devices/DRA821A']
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# OS for the build. Sphinx uses source/{sdk_os} when looking for doc inputs
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sdk_os = 'edgeai'
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‎configs/AM62AX/AM62AX_edgeai_toc.txt‎

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devices/AM62AX/edgeai/datasheet_optiflow
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devices/AM62AX/edgeai/datasheet_tiovx_apps
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devices/AM62AX/edgeai/connectivity
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devices/AM62AX/edgeai/pi_hdr_programming
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devices/AM62AX/edgeai/faq
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devices/AM62AX/edgeai/getting_started
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devices/AM62AX/edgeai/index
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devices/AM62AX/edgeai/test_report
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devices/AM62AX/edgeai/release_notes
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devices/AM62AX/edgeai/release_notes_08_06
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devices/AM62AX/edgeai/release_notes_09_00
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devices/AM62AX/edgeai/release_notes_09_00_01
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devices/AM62AX/edgeai/release_notes_09_01
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devices/AM62AX/edgeai/release_notes_09_02
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devices/AM62AX/edgeai/release_notes_10_00
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devices/AM62AX/edgeai/release_notes_10_01
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edgeai/sdk_overview
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edgeai/configuration_file
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edgeai/edgeai_dataflows
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edgeai/inference_models
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edgeai/sample_apps
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edgeai/measure_perf
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edgeai/docker_environment
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edgeai/sdk_components

‎source/devices/AM62AX/edgeai/connectivity.rst‎

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============================
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Connectivity and Peripherals
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============================
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.. toctree::
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:maxdepth: 2
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pi_hdr_programming

‎source/devices/AM62AX/edgeai/datasheet_optiflow.rst‎

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====================
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Datasheet (Optiflow)
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====================
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The performance measurements includes the following,
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#. **FPS** : Effective framerate at which the application runs
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#. **Total time** : Average time taken to process each frame, which includes
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pre-processing, inference and post-processing time
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#. **Inference time** : Average time taken to infer each frame
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#. **CPU loading** : Loading on different CPU cores present
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#. **DDR BW** : DDR read and write BW used
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#. **HWA Loading** : Loading on different Hardware accelerators present
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Following are the latest performance numbers of the OpTIFlow demos:
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Source : **Video**
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==============================
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| Resolution : **1280x768**
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| Encoding : **h264**
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|
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.. figure:: ../../../images/edgeai/datasheet_optiflow_pipeline1.png
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:scale: 75
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:align: center
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GStreamer based data-flow pipeline with video file input source and display output
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.. csv-table::
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:file: ../../../edgeai/datasheet/AM62AX/optiflow/optiflow_video_am62a.csv
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:header-rows: 1
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Source : **CSI Camera with VISS (imx219)**
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======================================================
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| Capture Framerate : **30 fps**
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| Resolution : **1920x1080**
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| format : **SRGGB8**
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|
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.. figure:: ../../../images/edgeai/datasheet_optiflow_pipeline2.png
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:scale: 75
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:align: center
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GStreamer based data-flow pipeline with IMX219 sensor, ISP and display
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.. csv-table::
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:file: ../../../edgeai/datasheet/AM62AX/optiflow/optiflow_camera_am62a.csv
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:header-rows: 1

‎source/devices/AM62AX/edgeai/datasheet_tiovx_apps.rst‎

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======================
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Datasheet (TIOVX Apps)
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======================
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The performance measurements includes the following,
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#. **FPS** : Effective framerate at which the application runs
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#. **Total time** : Average time taken to process each frame, which includes
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pre-processing, inference and post-processing time
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#. **Inference time** : Average time taken to infer each frame
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#. **CPU loading** : Loading on different CPU cores present
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#. **DDR BW** : DDR read and write BW used
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#. **HWA Loading** : Loading on different Hardware accelerators present
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Following are the latest performance numbers of the edgeai-tiovx-apps:
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Source : **Video**
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==============================
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| Resolution : **1280x768**
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| Encoding : **h264**
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|
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.. csv-table::
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:file: ../../../edgeai/datasheet/AM62AX/tiovx-apps/tiovx_apps_video_am62a.csv
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:header-rows: 1
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Source : **CSI Camera with VISS (imx219)**
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======================================================
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| Capture Framerate : **30 fps**
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| Resolution : **1920x1080**
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| format : **SRGGB8**
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|
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.. csv-table::
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:file: ../../../edgeai/datasheet/AM62AX/tiovx-apps/tiovx_apps_camera_am62a.csv
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:header-rows: 1

‎source/devices/AM62AX/edgeai/faq.rst‎

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.. _pub_edgeai_FAQs:
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====
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FAQs
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====
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.. _pub_edgeai_multiple_usb_cams:
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Getting Error when trying to capture from multiple USB cameras simultaneously
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=============================================================================
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This is a common issue faced in the industry with many USB cameras.
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You may get errors like ``Failed to allocate required memory.`` when tying to
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capture simultaneously from more than one usb cameras.
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The root cause for this issue is that most of the USB cameras requests for more
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BW than actually required. If the use case is to capture only from 2 USB cameras
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, it can be done by connecting one of them to USB type-C port since it is
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internally connected to a separate instance of USB controller. But if the use
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case is to capture from more than 2 cameras, you need to modify the UVC driver
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to override the BW allocation.
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The root cause and work around is explained in detail in this
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blog `Multiple UVC cameras on linux <https://www.thegoodpenguin.co.uk/blog/multiple-uvc-cameras-on-linux>`_
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To apply the work around to our SDK, use below steps
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#. Download and install `Processor SDK Linux <https://software-dl.ti.com/processor-sdk-linux/esd/AM62AX/10_01_00/exports/docs/devices/AM62AX/linux/Overview/Download_and_Install_the_SDK.html>`__
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#. Get the patch to add `bandwidth_cap` parameter to `uvcvideo` kernel module `uvcvideo patch <https://www.spinics.net/lists/linux-media/msg175596.html>`_
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#. Apply the patch to kernel source in Processor SDK Linux Install path. Please refer to `PSDK building kernel <https://software-dl.ti.com/processor-sdk-linux/esd/AM62AX/10_01_00/exports/docs/linux/Foundational_Components_Kernel_Users_Guide.html#overview>`_
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#. Compile only `uvcvideo` module using below command
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.. code-block:: bash
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make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- am62ax_evm_a53_defconfig
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make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- ./drivers/media/usb/uvc/uvcvideo.ko
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#. Copy `./drivers/media/usb/uvc/uvcvideo.ko` to sk
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#. Remove `uvcvideo` module and install modified version using below commands
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.. code-block:: bash
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rmmmod uvcvideo
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insmod uvcvideo.ko
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#. Set the desired BW cap as shown below
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.. code-block:: bash
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echo 1200 > /sys/module/uvcvideo/parameters/bandwidth_cap
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.. note::
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The unit of BW here is Bytes/125us, you can estimate the approximate BW
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requirement by multiplying fps with size/frame

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