Low power demo on i.MX8MM.   9/28/2020: Attachments updated. 1. Fix a bug in 5.4.24 kernel that system can only wakeup once. 2. Remove 0x104 from atf patch. On 5.4.24, tested OK without PLL2.   9/8/2020: Attachments updated. Add patches for 5.4.24 kernel.   We use it to test power consumption on i.MX8MM EVK.   Usage: 1. Kernel: echo "mem" > /sys/power/state   2. M4: Select a power mode from menu and wait for wakeup. Default wakeup method is GPT.   Add more patches, which will add functions for the case: 1. M core RUN and A core in suspend with DDR OFF. 2. M core wakeup A core without DDR support.   Descriptions: freertos_lowpower.zip. A simple freertos example for M4 RUN when A core in DSM. Generally, we use MU_TriggerInterrupts(MUB, kMU_GenInt0InterruptTrigger); to do wakeup. low_power_demo.zip A simple baremetal example for M4 RUN when A core in DSM. Generally, we use MU_TriggerInterrupts(MUB, kMU_GenInt0InterruptTrigger); to do wakeup. Note that the freertos version will have more options in menu. atf patch: Allow A53 to enter fast-wakeup stop when M4 RUN. Also avoid bypass of some plls, which is important to make M4 RUN when A53 enters suspend. 0001-iMX8MM-GIR-wakeup.patch: GIR wakeup patch for kernel. Need kernel to use fsl-imx8mm-evk-m4.dtb. 0002-Don-t-keep-root-clks-when-M4-is-ON.patch. Don't keep root clocks when M4 is ON. 0001-plat-imx8mm-keep-the-necessary-clock-enabled-for-rdc.patch. There's a design issue that when wakeup from DSM, described in patch: "if NOC power down is enabled in DSM mode, when system resume back, RDC need to reload the memory regions config into the MRCs, so PCIE, DDR, GPU bus related clock must on to make sure RDC MRCs can be successfully reloaded." Note that this patch will keep PCIE, DDR and GPU clock on, which will increase the power. An optimization will be decrease PCIE, DDR and GPU clock before entering DSM.   Power measurement: Supply Domain Voltage(V) I(mA) P(mW) peak avg peak avg peak avg VDD_ARM(L6) 1.010029 1.009513 1.109 1.030 1.120 1.039 VDD_SOC(L5) 0.855199 0.854857 190.110 189.973 162.582 162.400 VDD_GPU_VPU_DRAM(L10) 0.977240 0.977050 19.865 19.800 19.413 19.346 NVCC_DRAM(L15) 1.094407 1.094168 2.059 1.984 2.253 2.171 Total         185.367 184.956   Notes: This power measurements is got by putting Cortex-A in DSM and Cortex-M in RUNNING. In other tests, if M core can be put to STOP mode, additional power can be saved (5 - 20mA in VDD_SOC). From the table, we can see that by putting DDR to retain, a lot of power can be saved in VDD_SOC and NVCC_DRAM.

Environment:   VMware player 15 + ubuntu 18.04 LTS Reference document: i.MX_Yocto_Project_User's_Guide.pdf 1. Software packages for the compilation # sudo apt-get install flex bison gperf build-essential zlib1g-dev # sudo apt-get install lib32ncurses5-dev x11proto-core-dev # sudo apt-get install libx11-dev lib32z1-dev libgl1-mesa-dev # sudo apt-get install tofrodos python-markdown libxml2-utils xsltproc # sudo apt-get install uuid-dev:i386 liblzo2-dev:i386 gcc-multilib g++-multilib # sudo apt-get install subversion openssh-server openssh-client uuid uuid-dev zlib1g-dev # sudo apt-get install liblz-dev lzop liblzo2-2 liblzo2-dev git-core curl # sudo apt-get install python3 python3-pip python3-pexpect python3-git python3-jinja2 pylint3 # sudo apt-get install u-boot-tools mtd-utils android-tools-fsutils # sudo apt-get install openjdk-8-jdk device-tree-compiler aptitude # sudo apt-get install libcurl4-openssl-dev nss-updatedb # sudo apt-get install chrpath texinfo gawk cpio diffstat # sudo apt-get install libncursesw5-dev libssl-dev libegl1-mesa # sudo apt-get install net-tools python libsdl1.2-dev xterm socat # sudo apt-get install icedtea-netx-common icedtea-netx 2. downloading yocto bsp (L5.4.24_2.1.0) # rm -rf ~/bin # mkdir ~/bin # curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo # chmod a+x ~/bin/repo # export PATH=~/bin:$PATH   # mkdir imx-yocto-bsp-5.4.24-2.1.0 # cd imx-yocto-bsp-5.4.24-2.1.0 # repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-zeus -m imx-5.4.24-2.1.0.xml # cd .repo/manifests # gedit imx-5.4.24-2.1.0.xml          Modify git to https like below:   <remote fetch="https://git.yoctoproject.org/git" name="yocto"/>   <remote fetch="https://github.com/Freescale" name="community"/>   <remote fetch="https://github.com/openembedded" name="oe"/>   <remote fetch="https://github.com/OSSystems" name="OSSystems"/>   <remote fetch="https://github.com/meta-qt5"  name="QT5"/>   <remote fetch="https://github.com/TimesysGit"  name="Timesys"/>   <remote fetch="https://github.com/meta-rust"  name="rust"/>   <remote fetch="https://git.openembedded.org"  name="python2"/>   <remote fetch="https://source.codeaurora.org/external/imx" name="CAF"/> Save it and exit. # cd ~/ imx-yocto-bsp-5.4.24-2.1.0 # repo sync          Begin to compile i.MX8MQ BSP: # DISTRO=fsl-imx-wayland MACHINE=imx8mqevk source imx-setup-release.sh -b build-wayland          If users want to use chromium, do it like below, otherwise omit the step.        Add CORE_IMAGE_EXTRA_INSTALL += "chromium-ozone-wayland" to local.conf        And use 8 thread to compile BSP # gedit ./conf/local.conf …… BB_NUMBER_THREADS =”4” PARALLEL_MAKE =”-j 4” CORE_IMAGE_EXTRA_INSTALL += "chromium-ozone-wayland" ……          Save it and exit. [comment]          If your ubuntu has 8GB DDR, BB_NUMBER_THREADS can be set to “2”, PARALLEL_MAKE can be set to “-j 2”. # bitbake chromium-ozone-wayland -c fetch # bitbake imx-image-full Use ulimit -n 4096 to solve the issue. Then continue. # bitbake imx-image-full chromium compilation error:          Compile chromium-ozone-wayland separately. # bitbake chromium-ozone-wayland -c cleansstate # bitbake chromium-ozone-wayland -c compile          Use the command to solve the problem. # gedit ../sources/meta-imx/meta-sdk/dynamic-layers/browser-layer/recipes-browser/chromium/chromium-ozone-wayland_%.bbappend DEPENDS += "\         libxkbcommon \         virtual/egl \         wayland \         wayland-native \          mesa         \ "          Add mesa to DEPENDS          Save and exit.          Continue to compile it. # bitbake chromium-ozone-wayland -c compile          done, continue to compile full image   # bitbake imx-image-full Attachment is document in pdf format, which should be clear. NXP TIC team Weidong Sun 08/21/2020

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343059 

In case you missed our recent webinar, you can check out the slides and comment below with any questions.

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-343823 

The Linux L4.14.98_1.0.0_GA; and SDK2.5 for 8QM/8QXP Post GA, SDK2.5.1 for 7ULP GA3 release are now available. Linux on IMX_SW web page, Overview -> BSP Updates and Releases -> Linux L4.14.98_2.0.0 SDK on https://mcuxpresso.nxp.com Files available: Linux:  # Name Description 1 imx-yocto-L4.14.98_2.0.0_ga.zip L4.14.98_2.0.0 for Linux BSP Documentation. Includes Release Notes, User Guide. 2 L4.14.98_2.0.0_ga_images_MX6QPDLSOLOX.zip i.MX 6QuadPlus, i.MX 6Quad, i.MX 6DualPlus, i.MX 6Dual, i.MX 6DualLite, i.MX 6Solo, i.MX 6Solox Linux Binary Demo Files 3 L4.14.98_2.0.0_ga_images_MX6SLLEVK.zip i.MX 6SLL EVK Linux Binary Demo Files 4 L4.14.98_2.0.0_ga_images_MX6UL7D.zip i.MX 6UltraLite EVK, 7Dual SABRESD, 6ULL EVK Linux Binary Demo Files 5 L4.14.98_2.0.0_ga_images_MX7DSABRESD.zip i.MX 7Dual SABRESD Linux Binary Demo Files  6 L4.14.98_2.0.0_ga_images_MX7ULPEVK.zip i.MX 7ULP EVK Linux Binary Demo Files  7 L4.14.98_2.0.0_ga_images_MX8MMEVK.zip i.MX 8MMini EVK Linux Binary Demo Files  8 L4.14.98_2.0.0_ga_images_MX8MQEVK.zip i.MX 8MQuad EVK Linux Binary Demo files 9 L4.14.98_2.0.0_ga_images_MX8QMMEK.zip i.MX 8QMax MEK Linux Binary Demo files 10 L4.14.98_2.0.0_ga_images_MX8QXPMEK.zip i.MX 8QXPlus MEK Linux Binary Demo files 11 imx-scfw-porting-kit-1.2.tar.gz System Controller Firmware (SCFW) porting kit of L4.14.98_2.0.0 12 imx-aacpcodec-4.4.5.tar.gz Linux AAC Plus Codec v4.4.5 13 VivanteVTK-v6.2.4.p4.1.7.8.tgz Vivante Tool Kit v6.2.4.p4.1.7.8   SDK: On https://mcuxpresso.nxp.com/, click the Select Development Board, EVK-MCIMX7ULP//MEK-MIMX8QM/MEK-MIMX-8QX to customize the SDK based on your configuration then download the SDK package.  Target board: MX 8 Series MX 8QuadXPlus MEK Board MX 8QuadMax MEK Board MX 8M Quad EVK Board MX 8M Mini EVK Board MX 7 Series MX 7Dual SABRE-SD Board MX 7ULP EVK Board MX 6 Series MX 6QuadPlus SABRE-SD and SABRE-AI Boards MX 6Quad SABRE-SD and SABRE-AI Boards MX 6DualLite SDP SABRE-SD and SABRE-AI Boards MX 6SoloX SABRE-SD and SABRE-AI Boards MX 6UltraLite EVK Board MX 6ULL EVK Board MX 6ULZ EVK Board MX 6SLL EVK Board What’s New/Features: Please consult the Release Notes.   Known issues For known issues and more details please consult the Release Notes.   More information on changes of Yocto, see: README: https://source.codeaurora.org/external/imx/imx-manifest/tree/README?h=imx-linux-sumo ChangeLog: https://source.codeaurora.org/external/imx/imx-manifest/tree/ChangeLog?h=imx-linux-sumo#

This documents describes how to add the NFC support to i.MX8M mini evk running Android Pie. Hardware setup: The i.MX8M mini evk (see i.MX 8M Mini Evaluation Kit | NXP) featuring Raspberry Pi compliant connector, the OM5578/RPI PN7150 demo kit can be used to perform this porting (see NFC Development Kits for Arduino and more|NXP). However a small modification must be done because some of the signals required by PN7150 are not mapped to i.MX8M mini expansion connector pins. OM5578 IRQ signal must be mapped to Raspberry Pi connector pin #19 and OM5578 VEN signal must be mapped to Raspberry Pi connector pin #21. See below a picture of the modification: Then, the two boards can fit together as shown in the picture below: Quick start using demo image: The demo image including support for PN7150, is based on Android P9.0.0 Pie (P9.0.0_1.0.0, 4.14 kernel) i.MX software release (see i.MX Software | NXP). Related documentation can be downloaded from here: https://www.nxp.com/docs/en/supporting-information/android_p9.0.0_1.0.0-ga_docs.zip. Just flash the demo image (downloaded from here:https://www.nxp.com/lgfiles/updates/NFC/ANDROID_P9-0-0_PN7150_IMAGE_8MMEVK.zip) following guidelines from i.MX_Android_Quick_Start document (part of Android P9.0.0_1.0.0 Documentation package mentioned above). The NFC support is then included in the device settings, as shown in below screenshot of the device: Approaching the NFC tag, provided as reference in the OM5578 demo kit, to the NFC Antenna will trigger a sound notification: Unfortunately the Android demo image doesn't embed a web browser, so it won't be automatically open when the NFC tag content (an URL to the demo kit web page) is read. Otherwise (if a web browser is installed) you could see such page opening on the device: Adding PN7150 support to imx-android-pie release: If you wish to add PN7150 support to your imx-android-pie environment, just apply the patches (imx-p9.0.0_1.0.0-ga_pn7150_patches.tar.gz file attached) from the ${MY_ANDROID} source code root folder (refer to i.MX_Android_User_Guide document part of Android P9.0.0_1.0.0 Documentation package mentioned above).  $ patch -p1 -d device/fsl/ <device_fsl.patch  $ patch -p1 -d packages/apps/Nfc <packages_apps_Nfc.patch  $ patch -p1 -d hardware/nxp/nfc <hardware_nxp_nfc.patch  $ patch -p1 -d vendor/nxp <vendor_nxp.patch  $ patch -p1 -d vendor/nxp-opensource/kernel_imx/ <vendor_nxp-opensource_kernel_imx.patch When building, the PN7150 support will then be included to the android image, as shown in the demo image described above. Reference: This porting have been done (demo image and patches creation) following guidelines provided in AN11690_NXP-NCI_Android_Porting_Guidelines document.

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-342719 

[中文翻译版] 见附件   原文链接： https://community.nxp.com/docs/DOC-342877 

This document is a user guide for the GStreamer version 1.0 based accelerated solution included in all the i.MX 8 family SoCs supported by NXP BSP L5.4.24_1.1.0. Some instructions assume a host machine running a Linux distribution, such as Ubuntu, connected to i.MX 8 device. These commands were tested using Ubuntu 18.04 LTD, and while Ubuntu is not required on the host machine, other distributions have not been tested. These instructions are targeted for use with the following hardware: • i.MX 8MQ EVK • i.MX 8MN EVK • i.MX 8MN EVK • i.MX 8QXP MEK B0 • i.MX 8QM MEK B0   Release History v1.0 - Mar 2020 - Initial release. v2.0 - Sep 2020: Added the following content: - Mux/Demux Examples - Audio Examples - Image Examples - Transcode Examples - Streaming Examples - Multi-Display Examples - Scaling and Rotation Examples - Zero-copy Examples - Debug Examples Maintainers: . Marco Franchi . Pedro Jardim