Test Environment： i.MX8MP EVK L6.6.52(weston12)   Background Current RDP only supports TLS authentication, but does not support the NLA feature or PAM password authentication. Therefore, the connection security of RDP will be very low, and you can even login remotely without the correct username and password. This article implements the NLA feature and PAM password authentication base on weston rdp backend, which supports customized user and login.   1.Patches patch weston-imx with add_rdp_pam_nla_support.patch patch meta-imx with add_pam_support_and_weston_user.patch   2.Generate keys on Ubuntu rename key as server.crt and server.key sudo apt-get install winpr-utils winpr-makecert -rdp -path ~/ copy server.crt and server.key from Ubuntu to /etc/freerdp/keys/ on i.MX board 3. Enable start-on-startup=true in weston.ini   4.Install Remmina on Ubuntu.   5.Generate SAM file on board and Ubuntu: /etc/winpr/SAM(SAM is a file, not a directory) and copy hash into /etc/winpr/SAM The username weston and passwd has been set in add_pam_support_and_weston_user.patch. username: weston passwd: weston domain: domain   $ winpr-hash -u weston -d domain -p weston -v1 -f sam weston:domain::b2ca4ec6a1dbd13c49b6ab5e1b10d5bf::: $ vi /etc/winpr/SAM   6.Access with Remmina on Ubuntu. 7.Result      

We are pleased to announce that Config Tools for i.MX v24.12 are now available. Downloads & links To download the installer for all platforms, please login to our download site via:  https://www.nxp.com/design/designs/config-tools-for-i-mx-applications-processors:CONFIG-TOOLS-IMX Please refer to  Documentation  for installation and quick start guides. For further information about DDR config and validation, please go to this  blog post. Release Notes Full details on the release (features, known issues...) • DDR tool – Support for the custom System Manager image import is added. – i.MX 95 advanced tests are enabled: Vref for DQ and Vref for CA optimization • SerDes tool – Additional parameters for TX configuration on GUI (swing, margin, equalization) for i.MX 95 are added. – PCIe Gen1/Gen2/Gen3 switch on pattern generation. • Clocks – Modular clocks initialization is supported. – Initialization mode is visible in the Clocks diagram and Details view. – New Modular Initialization view for configuration of the initialization mode and core selection of the module is created. • TEE – Configuration and overview of areas with the same address and different address space is supported. – Code generation can be toogled for global options groups. – The process for releasing ELE crypto before setting up TRDC is supported. • Pins – Miscellaneous tab for various Pins configuration options is added. – Filtering for routing dialogs is added.

This guide walks you through setting up and building the Yocto SDK, customizing a device tree (DTS), and compiling the kernel for NXP i.MX platforms. It is designed to simplify the process, from downloading tools to creating functional images for embedded devices. Prerequisites Required Software: A Linux-based operating system (Ubuntu/Debian recommended). Git installed (sudo apt install git). Yocto dependencies: $ sudo apt install gawk wget git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 python3-subunit zstd liblz4-tool file locales libacl1 ​ Hardware: An NXP i.MX-based development board (i.MX6, i.MX7, i.MX8, or i.MX9). Sufficient storage space   1. Downloading the Repository Start by downloading the necessary tools and repository. If the ~/bin folder does not already exist, create it: $ mkdir ~/bin (this step may not be needed if the bin folder already exists) $ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo $ chmod a+x ~/bin/repo $ export PATH=~/bin:$PATH   2. Compile the Yocto SDK: Create and navigate to a release directory: $: mkdir <release> $: cd <release>   Initialize and sync the repo: $: repo init -u https://github.com/nxp-imx/imx-manifest -b <branch name> [ -m <release manifest>] $: repo sync   Set up the environment and build the SDK: $: [MACHINE=<machine>] [DISTRO=fsl-imx-<backend>] source ./imx-setup-release.sh -b bld-<backend> $: bitbake <image recipe> -c populate_sdk   Example: $: mkdir Yocto_SDK $: cd Yocto_SDK $: repo init -u https://github.com/nxp-imx/imx-manifest -b imx-linux-scarthgap -m imx-6.6.52-2.2.0.xml $: repo sync $: MACHINE=imx93evk DISTRO=fsl-imx-xwayland source ./imx-setup-release.sh -b bld-xwayland $: bitbake imx-image-full -c populate_sdk   Recommendation: Use the full image (imx-image-full) to include all available packages and libraries.   Run the generated .sh file to install the SDK: sudo ./fsl-imx-xwayland-glibc-x86_64-imx-image-full-armv8a-imx93evk-toolchain-6.6-scarthgap.sh   The final .sh file is located in: bld-xwayland/tmp/deploy/sdk/   3. Cloning the Kernel Repository (linux-imx repository)   Clone the kernel source matching the version of the Yocto SDK you built earlier:   $: git clone https://github.com/nxp-imx/linux-imx.git -b <Kernel-version>   EXAMPLE: $: git clone https://github.com/nxp-imx/linux-imx.git -b lf-6.6.52-2.2.0   4. Customizing the Device Tree Device trees can be modified or created based on your hardware setup.   Device Tree Locations:   iMX6 and iMX7: arch/arm/boot/dts/nxp/imx/   iMX8 and iMX9: arch/arm64/boot/dts/freescale/   If you create a new device tree, add it to the respective Makefile:   iMX8 and iMX9: arch/arm64/boot/dts/freescale/Makefile   iMX6 and iMX7: arch/arm/boot/dts/nxp/imx/Makefile     5. Setting Up the Cross-Compilation Environment To prepare for kernel compilation, source the environment setup script. Assuming the Yocto SDK is installed in /opt, run:   EXAMPLE: $ source /opt/fsl-imx-xwayland/6.6-scarthgap/environment-setup-armv8a-poky-linux   6. Configuring the Kernel Make configuration adjustments as needed:   iMX8 and iMX9: arch/arm64/configs/imx_v8_defconfig   iMX6 and iMX7: arch/arm/configs/imx_v7_defconfig   Use the appropriate configuration command:   iMX8 and iMX9: $: make imx_v8_defconfig   iMX6 and iMX7: $: make imx_v7_defconfig   7. Compiling Device Trees Only   To compile only the device tree files, run: $: make dtbs   8. Compiling the Kernel Finally, compile the kernel image using: $ make -j $(nproc)   The resulting kernel image will be located in: iMX8 and iMX9: arch/arm64/boot/   iMX6 and iMX7: arch/arm/boot/   References: IMX YOCTO PROJECT USERS GUIDE IMX LINUX USERS GUIDE  IMX REFERENCE MANUAL   

Kindly note that application note “AN12812: Using Code-Signing Tool with Hardware Security Module" has been removed from nxp.com. The AN is obsolete, the CST User’s guide describes how to use CST with an HSM using PKCS#11 interface. You can download CST package with its documentation from https://www.nxp.com/webapp/sps/download/license.jsp?colCode=IMX_CST_TOOL_NEW  

Hello everyone, this post is intended to add support to one of the most popular NFC chips on the market (PN532).  On this example I will use the I.MX93 EVK as reference board and focused in I2C communication for the PN532 Chip.    Details:   I.MX93 EVK  PN532 Module (I2C, SPI, UART)  BSP Linux 6.6.36_2.1.0 (Yocto)      STEP 1 (IMAGE COMPILATION).    At first, we need to compile our image for our board (in my case I.MX93 EVK) to add the NFC layer (Details on Yocto User's Guide😞😞 $ mkdir yocto-bsp $cd yocto-bsp $ repo init -u https://github.com/nxp-imx/imx-manifest -b imx-linux-scarthgap -m imx-6.6.36-2.1.0.xml $ repo sync $DISTRO=fsl-imx-wayland MACHINE=imx93evk source imx-setup-release.sh -b imx93evk-build   Then, add the support for NFC in our local.conf file:  $ nano conf/local.conf   We will add the below lines: CORE_IMAGE_EXTRA_INSTALL += "libnfc" CORE_IMAGE_EXTRA_INSTALL += "libnfc-dev"   Then, we can compile the image with:  $ bitbake imx-image-full   NOTE:  libnfc is a complete coverage of low-level PN53x chipset commands written in pure and plain C for portability and speed.  libnfc-dev are the development files and headers to use in our low-level applications.    By default, the NXP BSP support the NFC pn532 driver with a tool called nfctool, but this one is very limited compared with the libnfc.      STEP 2 (DEVICE TREE MODIFICATION).    We need to add the below lines to the Device tree:  &lpi2c5 { #address-cells = <1>; #size-cells = <0>; clock-frequency = <400000>; pinctrl-names = "default", "sleep"; pinctrl-0 = <&pinctrl_lpi2c5>; pinctrl-1 = <&pinctrl_lpi2c5>; status = "okay"; nfc@24 { compatible = "nxp,nxpnfc"; //we can set the "nxp,pn533" driver but it will just work for the nfctool mentioned before reg = <0x24>; clock-frequency = <400000>; interrupt-parent = <&gpio2>; interrupts = <18 IRQ_TYPE_EDGE_FALLING>; }; };    And to the iomux section(same in device tree):  pinctrl_lpi2c5: lpi2c5grp { fsl,pins = < MX93_PAD_GPIO_IO22__LPI2C5_SDA 0x40000b9e MX93_PAD_GPIO_IO23__LPI2C5_SCL 0x40000b9e MX93_PAD_GPIO_IO18__GPIO2_IO18 0x31e >; };     STEP 3 (Connection with PN532 MODULE).     For this example, we must connect the Module with the I.MX93 RP Header as follows:    I.MX93 SIDE  PN532 SIDE  GND  GND  VCC  VCC  GPIO_IO22  SDA  GPIO_IO23  SCL  GPIO_IO18  IRQ    STEP 4 (BOOT BOARD AND CREATE libnfc.conf FILE).    Once when we have booted our board and selected our modified Device Tree, we should see our i2c-4 under /dev of our Linux OS: root@imx93evk:~# ls /dev | grep i2c i2c-0 i2c-1 i2c-2 i2c-4   And see our specific device (0x24) with the i2cdetect tool:   root@imx93evk:~# i2cdetect -y 4 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- 24 -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- --     Now, we need to create a file called libnfc.conf under /etc/nfc/ (You can create that directory if does not exist).  This file must contain information about how the libnfc layer will communicate with the i2c device:    # Allow device auto-detection (default: true) # Note: if this auto-detection is disabled, user has to set manually a device # configuration using file or environment variable allow_autoscan = false # Allow intrusive auto-detection (default: false) # Warning: intrusive auto-detection can seriously disturb other devices # This option is not recommended, user should prefer to add manually his device. allow_intrusive_scan = true # Set log level (default: error) # Valid log levels are (in order of verbosity): 0 (none), 1 (error), 2 (info), 3 (debug) # Note: if you compiled with --enable-debug option, the default log level is "debug" log_level = 2 # Manually set default device (no default) # To set a default device, you must set both name and connstring for your device # Note: if autoscan is enabled, default device will be the first device available in device list. #device.name = "_PN532_SPI" #device.connstring = "pn532_spi:/dev/spidev0.0:500000" device.name = "_PN532_I2c" device.connstring = "pn532_i2c:/dev/i2c-4"   As you can see, the most important line to modify is the device.connstring, that is the charged of interaction and connection between the PN53x Module and the libnfc layer. In my case is pn532_i2c:/dev/i2c-4.    Now we can use the NFC module:  root@imx93evk:~# nfc-list nfc-list uses libnfc 1.8.0 NFC device: _PN532_I2c opened root@imx93evk:~#   And read UID of TAGs:  root@imx93evk:~# nfc-poll nfc-poll uses libnfc 1.8.0 NFC reader: _PN532_I2c opened NFC device will poll during 36000 ms (20 pollings of 300 ms for 6 modulations) ISO/IEC 14443A (106 kbps) target: ATQA (SENS_RES): 00 44 UID (NFCID1): 04 17 b5 d2 a2 11 90 SAK (SEL_RES): 00 Waiting for card removing...nfc_initiator_target_is_present: Target Released done. root@imx93evk:~#   Also, attached is a little application using the NFC headers installed with libnfc-dev. Tha application will do a poll with a 10 seconds time out. If Tag is not detected in 10 seconds, the app will close. If a tag is detected before the timeout, the app will print the UID of the NFC TAG:   OUTPUT of timeout: root@imx93evk:~# ./nfc-app NFC reader: _PN532_I2c opened Waiting for an NFC tag (timeout: 10 seconds)... No NFC tag detected within the timeout period. root@imx93evk:~#   OUTPUT when tag is detected: root@imx93evk:~# ./nfc-app NFC reader: _PN532_I2c opened Waiting for an NFC tag (timeout: 10 seconds)... Tag detected - UID: 04:16:BC:D2:A2:11:90 root@imx93evk:~#   To compile the app just copy the attached nfc-app.c file to the i.MX93 EVK and compile using this command: root@imx93evk:~# gcc nfc-app.c -o nfc-app -lnfc     I hope this thread can be helpful!   Best regards, Salas.  

Please notice the following patches are only tested in the environment that is listed below. For the environment with other software versions or hardware equipment, some other editing  may be required Environment: i.MX 8MP EVK LVDS：LVDS BOE EV121WXM-N10-1850  LVDS to MiniSAS panel：XMX-LVDS-MINISAS Software: LF5.15.71 U-boot: 1. Apply '0001-Enable-DY1212W-4856-in-U-boot-for-i.MX8MP.patch' to enable EV121WXM-N10-1850  in U-boot stage. If other LVDS panel is used here, you will need porting your specific LVDS device in this step. 2. Apply '0002-Modify-u-boot-to-show-logo-seamlessly-for-i.MX8MP.patch' to make sure display related models won't be power off, which will help to achieve seamless display. 3. In the original U-boot driver, PWM isn't enable. Therefore, apply '0003-Enable-PWM-and-BACKLIGHT-in-U-boot-and-modify-to-sho.patch' to enable PWM. Kernel: 1. Apply '0001-Enable-DY1212W-4856-in-Kernl-for-i.MX8MP.patch' to enable EV121WXM-N10-1850  in Kernel. If other LVDS panel is used here, you will need porting your specific LVDS device in this step. 2. Apply '0002-Modify-Kernel-to-show-logo-seamlessly-for-i.MX8MP.patch' to make sure LVDS related models won't be init in the booting progress. 3. Apply '0003-Enable-PWM-and-BACKLIGHT-in-Kernel-and-modify-to-sho.patch' to make sure we could edit backlight of panel in Kernel. 

Please notice the following patches are only tested in the environment that is listed below. For the environment with other software versions or hardware equipment, some other editing  may be required Environment: i.MX 93 EVK LVDS：LVDS BOE EV121WXM-N10-1850  Software: LF6.1.36 U-boot: 1. Apply '0001-Add-LVDS-driver-and-BOE-12.1-EV121WXM-N10-1850-LVDS-.patch' to enable EV121WXM-N10-1850  in U-boot stage. If other LVDS panel is used here, you will need porting your specific LVDS device in this step. 2. Apply '0002-Modify-u-boot-to-show-logo-seamlessly.patch' to make sure display related models won't be power off, which will help to achieve seamless display. Kernel: 1. Apply '0001-Keep-NXP-logo-until-Weston-is-booted-for-i.MX93-in-L.patch' to make sure LVDS related models won't be init in the booting progress.

Please notice the following patches are only tested in the environment that is listed below. For the environment with other software versions or hardware equipment, some other editing  may be required Environment: i.MX 8MP EVK MIPI DSI: MX8-DSI-OLED1 (RM67191) Software: LF5.15.71 U-boot: 1. Apply '0001-Modify-u-boot-to-show-logo-seamlessly.patch' to make sure display related models won't be power off, which will help to achieve seamless display. Kernel: 1. Apply '0001-Keep-NXP-logo-until-Weston-is-booted-8MP-MIPI.patch' to make sure MIPI-DSI related models won't be re-init in the booting progress.

This article demonstrates several simple gpio leds as system indicators, including kernel panic indicators.   HW: i.MX93 11x11 EVK SW: lf-6.6.3-1.0.0    

    Test envs: BOARD: i.MX 8MN EVK BSP: L6.6.36   The L6.6.y includes the feature about supporting starting Cortex-M33 from non-TCM address for i.MX93, but not for i.MX8M series.    LF-7815 remoteproc: imx_rproc: support starting Cortex-M33 from non-TCM address for i.MX93 https://github.com/nxp-imx/linux-imx/commit/680aa11c7bdaddf6bbffd74bc0a94ef67593b69b#diff-66a34e17e82d281936f559217adc3983b39abeb2e478967f3d5cef2eed5b67fcR693   For older BSP, customer can refer this full patch set https://patchew.org/linux/20230209063816.2782206-1-peng.fan@oss.nxp.com/   If you want to test ELF in DDR on i.MX8M series and i.MX93 platform with L6.6.y, please use below patch set.  

 

 

 

Introduction LVGL is a graphics library to run on devices using a limited amount of resources. Previously, we have ran an LVGL demo from the LVGL repository, this contains a couple more demos which all of them are pieces of code included and lends us the opportunity to evaluate the library in a quick and easy way. GUI projects are developed by customers through a lot more options than bare code, there are GUI tools that translate a graphic asset into LVGL code, in this demonstration we will use a tool that's widely used in MCU GUI development and translate the GUI created into LVGL code; SquareLine. NOTE: refer to the appendix for precedent LVGL documents on i.MX series processors. HW set-up i.MX 93 EVK boot over eMMC/uSD to Linux Factory or Ubuntu. Connect power and debug receptables. Connect MX8_DSI_OLED1 to J701 (MIPI DSI) through MiniSAS cable. SquareLine set-up Download the latest version of SquareLine under the following link according to your host system. NOTE: This document is intended for demonstration of templates included within the tool, so it's recommended to download a free trial, for formal development please refer to the appendix of this document. Unzip and execute the installer, this is the windows prompt.   Demo download After setting SquareLine up go to the example section, we will demonstrate the thermostat capabilities with the Thermostat Demo. We can directly export these UI files and they would be graphically ready to be build, click on Export -> Export UI Files and select your preferred destination to save these.   LVGL setup. Option 1 Fresh Environment Clone LVGL and LV_DRIVERS repositories, this is a .gitmodules file that points to the specific branches needed. [submodule "lvgl"] path = lvgl url = https://github.com/lvgl/lvgl.git branch = release/v8.3 [submodule "lv_drivers"] path = lv_drivers url = https://github.com/lvgl/lv_drivers.git branch = release/v8.3 NOTE: If you are using other methods, you should point to these commits, lv_drivers @ 8cdabe8 and lvgl @ f2c1032. Gather the necessary files described below from the LVGL Linux Port example found here. Makefile lv_conf.h lv_drv_conf.h main.c mouse_cursor_icon.c Patch the Makefile. + include $(LVGL_DIR)/thermostat/thermostat.mk Patch the lv_drv_conf.h # define EVDEV_NAME "/dev/input/event10" /*You can use the "evtest" Linux tool to get the list of devices and test them*/ +# define EVDEV_NAME "/dev/input/event<Number>" NOTE: This changes according to the output of # evtest. Patch lv_conf.h -#define LV_FONT_MONTSERRAT_20 0 +#define LV_FONT_MONTSERRAT_20 1 Patch the main.c - disp_drv.hor_res = 800; - disp_drv.ver_res = 480; + disp_drv.hor_res = 1080; + disp_drv.ver_res = 1920; … - /*Create a Demo*/ - lv_demo_widgets(); + /*Create a Squareline Demo*/ + ui_init(); LVGL Setup. Option 2 with LVGL demos already running Gather the necessary files described below from the LVGL Linux Port example found here. Makefile lv_conf.h lv_drv_conf.h main.c mouse_cursor_icon.c Patch the lv_drv_conf.h # define EVDEV_NAME "/dev/input/event10" /*You can use the "evtest" Linux tool to get the list of devices and test them*/ +# define EVDEV_NAME "/dev/input/event<Number>" NOTE: This changes according to the output of # evtest. Patch the main.c - disp_drv.hor_res = 800; - disp_drv.ver_res = 480; + disp_drv.hor_res = 1080; + disp_drv.ver_res = 1920; … - /*Create a Demo*/ - lv_demo_widgets(); + /*Create a Squareline Demo*/ + ui_init(); Run the demo Build the demo with the following command and copy the ./demo output to the i.MX 93 EVK RootFS. # source /opt/path/to/your/toolchain # make clean # make The demo can be ran with the following commands. # systemctl stop weston # For LF $ sudo service gdm3 stop # For Ubuntu # ./demo   Conclusion SquareLine demos can run in prebuilt and basic builds of i.MX processors through FB, which can enable a quick set-up for GUI testing before moving to use a windowing stack without sacrificing any features. Appendix Document: How to run LGVL on iMX using framebuffer Official page for pricing information

some customers have issue with uboot resetting on new bsp because of lack of mac address and different design fom nxp evk board, this doc shows how to set the mac address in different way(fuse, dts file, header file), then check the different HW design between customized board with nxp board, according to the HW design to change the uboot 

  JEIDA-24 is adopted in most use-cases, and also the default format in Linux BSP(6.x)  Actually, JEIDA-18 is also supported in Linux BSP by not mentioned explicitly.   JEIDA-18 can be supported in two configuration: 1. Keep JEIDA-24 setting to display controllers, skip 4th data-lane in hardware connection: according JEIDA-24 output waveform, it has 4 data-lane enabled on LVDS bus: since the data-bits on TxOUT3 are the LSBs of the pixels, to change from JEIDA-24(RGB888, 4 data-lane) to JEIDA-18(RGB666, 3 data-lane), it can be achieved by skipping the TxOUT3 output(4th data-lane) in hardware connection, to make the JEIDA-18 format as the picture below(JEIDA-18 LCD panels only require 3 data-lanes)   2. Change the display controller settings to JEIDA-18: one reference by Variscite, one of the SoM vendor: https://variwiki.com/index.php?title=DART-MX8M-PLUS_Display&release=mx8mp-yocto-mickledore-6.1.36_2.1.0-v1.3 related setting quoted from the link above: Supported "data-mapping" values are "jeida-18", "jeida-24" and "vesa-24". Supported "fsl,data-mapping" values are "jeida", and "spwg". Supported "fsl,data-width" values are <18>, and <24>.    "data-mapping"= "jeida-18", "jeida-24" and "vesa-24" are handled in DRM driver, as the link below: https://github.com/nxp-imx/linux-imx/blob/d23d64eea5111e1607efcce1d601834fceec92cb/drivers/gpu/drm/drm_of.c#L451 if (!strcmp(mapping, "jeida-18")) return MEDIA_BUS_FMT_RGB666_1X7X3_SPWG; if (!strcmp(mapping, "jeida-24")) return MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA; if (!strcmp(mapping, "vesa-24")) return MEDIA_BUS_FMT_RGB888_1X7X4_SPWG;    Here the variable “MEDIA_BUS_FMT_RGB666_1X7X3_SPWG" is handled in ldb driver(MX8MP) as the link below: https://github.com/nxp-imx/linux-imx/blob/d23d64eea5111e1607efcce1d601834fceec92cb/drivers/gpu/drm/bridge/fsl-ldb.c#L144 switch (bridge_state->output_bus_cfg.format) { case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG: lvds_format_24bpp = false; lvds_format_jeida = true; break; case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA: lvds_format_24bpp = true;  the bus_format would be "MEDIA_BUS_FMT_RGB666_1X18" in this configuration:  https://github.com/nxp-imx/linux-imx/blob/d23d64eea5111e1607efcce1d601834fceec92cb/drivers/gpu/drm/imx/imx8mp-ldb.c#L178 switch (ldb_ch->bus_format) { case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG: imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB666_1X18; break;    “MEDIA_BUS_FMT_RGB666_1X18” is not handled in LCDIF driver:  https://github.com/nxp-imx/linux-imx/blob/d23d64eea5111e1607efcce1d601834fceec92cb/drivers/gpu/imx/lcdifv3/lcdifv3-common.c#L310 switch (bus_format) { case MEDIA_BUS_FMT_RGB565_1X16: disp_para |= DISP_PARA_LINE_PATTERN(LP_RGB565); break; case MEDIA_BUS_FMT_RGB888_1X24: disp_para |= DISP_PARA_LINE_PATTERN(LP_RGB888_OR_YUV444); break; default: dev_err(lcdifv3->dev, "unknown bus format: %#x\n", bus_format); return;    hence there would be error message below in this configuration, which can be ignored: imx-lcdifv3 32e80000.lcd-controller: unknown bus format: 0x1009  

Hibernation mode (suspend to disk) will be useful for boot time optimization, especially under heavy application usage cases. This article is a quick guide for how to enable hibernation mode in Linux running on i.MX93. Some limitation and pitfalls will also be introduced.   Detail PDF attached.    

There are two ethernet ports in i.MX8MP： FEC0 and FEC1(eQOS). Normally we use iperf to test ethernets ports performance. However, when using tftp test, the result is different in two ports. This document describe how to fine tune parameters to increase speed under tftp test or other use case. It is suitable for most i.MX serials and most BSP version.

Customers are experiencing significant and unexpected performance issues in their applications running on Android 14 relative to the performance that they saw on older versions of the OS (such as A12 or A13). This is a known issue on Android Community and is note related to NXP implementation of AOSP (Android Open Source Project). The information Android 14 can recollect from any debuggable application is a lot. With the help of Perfetto you can get and incredible analysis of all processes running on Android OS or an analysis of the memory usages. All this features have a side effect on debuggable applications, where debuggable application can experiment low performance. The degradation on the performance is around 1.5x and 2.0x the time taken on a previous Android version. In order to take really measurements on the application performance it is necessary to disable those features when building the apk . Quick Workaround There are two ways of disabling debug features: Build a release variant by adding a dummy key to Android-Studio. Read the following link to get further details on how to do it. Set debuggable feature to false on build.gradle (Module :app) . Here an example: android { buildTypes { debug { applicationIdSuffix '.debug' debuggable false // The important line! } } } Rebuild the apk and installed to the target with adb install <my-apk> . The application should now have the same performances it was having with A13 or older. References: Debuggable APP lag after updating to Android14

Poring from MCIMX6Y2CVM05AB to MCIMX6Y1DVM05AB Backgroud: Our customers encounter Kernel stuck at starting kernel issue. Here is detail description as below: (1 )Using customer board, and the main chip is MCIMX6Y1DVM05AB. (2) MCIMX6Y2CVM05AB works fine using the same image. (3)The kernel version is L5.10.52. But the old L4.14.98 works fine. (4)Using imx6ull evk's dtb has the same symptom. (imx6ull-14x14-evk.dtb in L5.10.52 prebuild image from NXP. (5)The  L4.14.98 versionBSP both  MCIMX6Y1DVM05AB and MCIMX6Y2CVM05AB can work well For the L5.10.52 only the MCIMX6Y2CVM05AB can work​. Kernel crash at here:   Generally speaking, most customer need to porting from old chip to new, for this customer need to use porting from the new product to old products they have their reasons.     Two reasons: (1) Their previous project use MCIMX6Y1DVM05AB. And also have MCIMX6Y1DVM05AB stock. (2) And the customer needs 15kpcs for urgent demand. But there is no MCIMX6Y2CVM05AB stock in their city.​ Porting steps: For these two products, they are difference, but most pins to pins in design. 1\Found the difference for this two product: See the datasheet: https://www.nxp.com.cn/docs/en/data-sheet/IMX6ULLCEC.pdf https://www.nxp.com.cn/docs/en/data-sheet/IMX6ULLIEC.pdf     For the MCIMX6Y1DVM05AB do not have the LCD/CSI, one CAN, one Ethernet,one ADC.   2\Check the customer’s board dts setting and modify Ask customer for their Board dts file and check: The MCIMX6Y1DVM05AB chip has only followed features, so customer should make sure the related drivers are removed from dts. That means in climaxL5.10.52.7z, customer should disable the followed drivers: pxp, lcdif, can2. (csi and fec2 are already disabled) (1) Disable the fec2   (2)CSI disable   (3)Lcdif disable   (4)CAN 2 Remove     Result: After remove these unused functions. The MCIMX6Y1DVM05AB could boot well on customer’s board. If customer use the MCIMX6Y2CVM05AB, all these functions need to add.