diff --git a/board/technexion/imx8mpico/readme.txt b/board/technexion/imx8mpico/readme.txt
index 1a04e44572..c20bfc0f44 100644
--- a/board/technexion/imx8mpico/readme.txt
+++ b/board/technexion/imx8mpico/readme.txt
@@ -45,7 +45,7 @@ J2: jumper on pins 2 and 4.
 
 In case the board was flashed with a wrong u-boot, or the eMMC is
 erased, u-boot can be loaded by USB Serial Download boot mode, using
-imx-usb-loader. See [3] and [4].
+imx-usb-loader. See [3].
 
 For flashing:
 - Plug the micro USB cable from the Debug USB Port, to your computer
@@ -53,9 +53,13 @@ For flashing:
 
 In the U-Boot prompt launch:
 
-=> ums 0 mmc 0
+=> ums 0 mmc ${mmcdev}
 
 This will mount the eMMC content in the host PC as a mass storage device.
+Note: the ${mmcdev} id may change from one uboot version to another. The
+actual id can be confirmed by running commands "mmc rescan" then
+"mmc list", to find the eMMC entry. Finally it's possible to enter
+directly the mmc device id, for example: "ums 0 mmc 2".
 
 To determine the device associated to the eMMC card have a look in the
 /proc/partitions file:
@@ -69,12 +73,13 @@ Buildroot prepares a bootable "sdcard.img" image in the output/images/
 directory, ready to be dumped on the eMMC. Launch the following
 command as root:
 
-  dd if=output/images/sdcard.img of=/dev/<your-sd-device>
+  dd bs=1M if=output/images/sdcard.img of=/dev/<your-sd-device>
 
 *** WARNING! This will destroy all the eMMC content. Use with care! ***
 
 This operation can take several minutes, depending on the image
-size. When tested, a 2MB/s transfer rate was observed.
+size. When tested, a 10MB/s transfer rate was observed. Note: the
+blocksize "bs=1M" parameter gives better transfer performances.
 
 For details about the medium image layout, see the definition in
 board/freescale/common/imx/genimage.cfg.template.
@@ -90,6 +95,5 @@ To boot your newly created system:
 Enjoy!
 
 [1]. https://www.technexion.com/products/system-on-modules/pico/pico-compute-modules/detail/PICO-IMX8M
-[2]. https://www.technexion.com/products/system-on-modules/pico-evaluation-kits/detail/PICO-PI-IMX8M-BASIC
-[3]. https://www.technexion.com/support/knowledgebase/boot-configuration-settings-for-pico-baseboards/
-[4]. https://www.technexion.com/support/knowledgebase/loading-bootable-software-images-onto-the-emmc-of-picosom-on-pico-pi/
+[2]. https://www.technexion.com/products/system-on-modules/evk/pico-pi-imx8m/
+[3]. https://developer.technexion.com/docs/pico-evaluation-kit-boot-mode-settings#picoimx8m-and-picoimx8mmini
diff --git a/configs/imx8mpico_defconfig b/configs/imx8mpico_defconfig
index 5478f267fc..55746fb67e 100644
--- a/configs/imx8mpico_defconfig
+++ b/configs/imx8mpico_defconfig
@@ -1,13 +1,14 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_14=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/freescale/common/imx/imx8-bootloader-prepare.sh board/freescale/common/imx/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="${UBOOT_DIR}/arch/arm/dts/imx8mq-pico-pi.dtb"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
-BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,TechNexion,linux,9146d4dcb2dda0c7614f74f824cfb20d29bd85f8)/linux-9146d4dcb2dda0c7614f74f824cfb20d29bd85f8.tar.gz"
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,TechNexion,linux-tn-imx,tn-hardknott_5.10.72-2.2.0_20220207)/linux-tn-im-tn-hardknott_5.10.72-2.2.0_20220207.tar.gz"
 BR2_LINUX_KERNEL_DEFCONFIG="tn_imx8"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="freescale/imx8mq-pico-pi freescale/imx8mq-pico-pi-dcss-ili9881c"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_PACKAGE_FREESCALE_IMX=y
 BR2_PACKAGE_FREESCALE_IMX_PLATFORM_IMX8M=y
 BR2_PACKAGE_FIRMWARE_IMX=y
@@ -18,13 +19,13 @@ BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
 BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_GIT=y
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_REPO_URL="https://source.codeaurora.org/external/imx/imx-atf"
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_REPO_VERSION="rel_imx_4.14.98_2.0.0_ga"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_REPO_VERSION="lf-5.10.72-2.2.0"
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="imx8mq"
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_BL31=y
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_TARBALL=y
-BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="$(call github,TechNexion,u-boot-edm,9a070a5b4460124054bc459edfc9d1b43e5403bb)/u-boot-edm-9a070a5b4460124054bc459edfc9d1b43e5403bb.tar.gz"
+BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="$(call github,TechNexion,u-boot-tn-imx,tn-hardknott_5.10.72-2.2.0_20220207)/u-boot-tn-imx-tn-hardknott_5.10.72-2.2.0_20220207.tar.gz"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="pico-imx8mq"
 BR2_TARGET_UBOOT_NEEDS_DTC=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM=y