Linux BSP Release

Description: The dsp is an optional silicon feature. Currently, some of the Apalis iMX8 (and maybe Colibri iMX8X) do not have the feature. The device-trees by default enable the DSP in the SoC dtsi. The current driver prints the following message if the DSP is missing, often followed by a kernel oops. | Failed power operation on resource 512 sc_err 3, power_on 1 Change the driver to first detect the existence of a DSP and react accordingly.

Description: eMMC is slower than expected on BSP 3.0b3

Workaround: none

Description: KSZ9031 is not IEEE compliant and will be replaced with KSZ9131 that passed compliance testing. Currently, we do not plan to replace existing KSZ9031 PHY on iMX6 modules.

Description: Update graphics to the latest version from NXP

Description: Updated to the latest NXP 2.3.0

Description: Initial support for Verdin Development Board 1.0A added

Description: Amend the following page with instructions on how to build for Apalis iMX8 and Colibri iMX8X, including the toolchain to use: https://developer.toradex.com/knowledge-base/build-u-boot-and-linux-kernel-from-source-code

Description: pixelclk-active = 1 still drives data at CLK in active low

Workaround: Use display resolution timings in kernel-parameters set in u-boot.

Description: Add support for MIPI-DSI

Description: Add UART Support

Description: Add support for Ethernet in bootloader and kernel.

Description: Add support for I2C

Description: Add support for UART

Description: Add support for Analog Audio Mic in

Description: Add support for Analog Audio Line In

Description: Add support for USB Client

Description: Add support for Ethernet

Description: Add support for DVI monitors

Description: U-boot: introduce update_uboot_recovery env wrapper. This should simplify and unify the process of updating u-boot stored in eMMC/NAND for development purposes, putting aside all differences of each SoM (NAND vs eMMC; Tegra vs iMX etc.).

Description: Support on-module WiFi is added.

Description: Add support for suspend/resume

Workaround: To avoid crash on suspend, add the boot kernel parameter "clk_ignore_unused".

Description: Add support for CAN

Description: Add and validate WiFi support on Apalis iMX8.

Description: Support initiating power-off, support switching carrier board power-off

Description: Add support for SPDIF Audio

Description: Add support for DDC for HDMI/DVI

Description: Add support for PCIe

Description: Add support for I2C

Description: Add support for Analog Inputs

Description: Add support for Analog Audio Mic in

Description: Add support for Analog Audio Line In

Description: Add support for USB Client

Description: Add support for DVI-D monitors

Description: We documented building the SCU firmware here
https://developer.toradex.com/knowledge-base/build-custom-imx-88x-system-controller-firmware-scfw
Toradex does not recommend customers rebuilding their own SCU firmware.

Description: While V1.0B modules with their bring-up BSP are fused and do boot from the primary eMMC hardware boot area partition their U-Boot environment still gets stored to the regular eMMC hardware user area partition which may corrupt the primary boot FAT partition.

Workaround: Do NOT save your U-Boot environment or your primary boot FAT partition will get corrupted.

Description: Move to a newer mainline U-Boot for future-prove support.

Description: U-boot: "Could not initialize PHY FEC" issue after software reboot due to too low auto-negotiation timeout value.

Workaround: Do cold reboot with the reset button or power off/on.

Description: Timeouts and reads from false channels may be observed when using STMPE811 ADC.

Description: NXP released BSP L4.14.98_2.0.0_ga. Update the kernel to that release.

Description: Support the new product version [00491000] Apalis iMX8QP 2GB V1.0A with our embedded Linux BSP.

Description: Support on-module RTC including wake-up had been done.

Description: Support for MIPI-DSI is added.

Description: Support for watchdog is added.

Description: Support for SPI is added

Description: Support for PWM is added.

Description: Support for Analog Inputs is added.

Description: Support for Analog Audio Headphone is added.

Description: Add support for SDIO / SD Card

Description: Support for USB Client is added.

Description: Ethernet works well on Colibri iMX8QXP SoM v1.0b + Colibri Evaluation Board v3.2b with Toradex Linux BSP >= 3.0b2.52

Description: Support parallel RGB displays

Description: We decided to remove legacy update tool support from BSP 3.0.

Workaround: Stick to BSP 2.8.

Description: util-linux among others provides taskset for setting a processe's CPU affinity.

Description: The Angstrom distribution was changed to a minimal image provided by Toradex, based on Poky.

Workaround: Use the latest stable BSP 2.8.

Description: Support the new product version [00371001] Apalis iMX8QM 4GB WB V1.0B with our embedded Linux BSP.

Description: Using GStreamer 1.12 from the OpenEmbedded/Yocto BSP with the MIPI-CSI OV5640 camera driver CONFIG_MXC_CAMERA_OV5640_MIPI_NV stutters (frames seem to be shown not in the correct order).

Description: Implementation of recovery mode for Apalis iMX8. Documented on https://developer.toradex.com/knowledge-base/imx-recovery-mode#Apalis_iMX8

Description: Support on module RTC

Description: Provide the full Toradex Easy Installer features

Description: Add support for 2D/3D graphics acceleration

Description: Add support for MIPI-CSI

Description: Add support for USB Host

Description: Add support for LVDS displays

Description: for operating Wi-Fi/BT capable modules with a single antenna please have a look at the following article on our developer website:
https://developer.toradex.com/knowledge-base/operating-wifibt-capable-modules-with-a-single-antenna

Description: The MCP2515 SPI CAN controller as found on the Colibri Evaluation Board is disabled by default in favour of toradex,evalspi SPIDEV. Let us change this like on the other Colibri modules.

Workaround: Just add Status = "disabled" to the toradex,evalspi device tree node and okay to the MCP2515 one.

Description: We switched from CRDA to direct loading of the Wi-Fi regulatory domain database in-kernel.

Description: If an Android phone is connected to the Colibri iMX6ULL, then an unexpected Linux kernel bug is shown and Bluetooth stops connecting. The only solution is to restart the module.

Description: iptables -L is not supported by our default Linux kernel configuration.

Workaround: A custom Linux Kernel compilation with correct configuration can solve the issue. The correct Linux kernel configuration is e.g. described here:
https://wiki.gentoo.org/wiki/Iptables

Description: Kernel crashes after M4 firmware started. The only log message is "Starting Kernel ...".

Workaround: Enter the following commands in U-Boot: setenv fdt_high=0xffffffff saveenv

Description: The touchscreen with 7" Capacitive Touch Display may not work well when used either on an Evaluation Board with the Capacitive Touch Adapter or on Aster or Ixora.

Description: NXP released BSP 4.9.123_2.3.0_ga. Patches for the user space components are in the master branch on meta-freescale. We pulled those into the rocko branch of meta-toradex-nxp.

Description: Wake from suspend is not working on Colibri iMX6ULL 512MB Wi-Fi / Bluetooth IT.

Description: Touchscreen with 7" Capacitive Touch Display does not work when used on an Aster carrier board with a Colibri T20/T30 module.

Description: Add a device tree which targets the aster carrier board. This also enables an easier integration of the Capacitive Touch 7" Parallel display.

Description: The CAN muxing ALT2 (can1.RX, can1.TX) for these pins are labelled ftm1.RX, ftm1.TX. Fix this.

Description: Update Wi-Fi Backports to 4.18

Description: When running with HS400 at 200 MHz the Kernel may report eMMC errors such as "mmcblk0: error -84 transferring data". Some systems also show "warning! HS400 strobe DLL status REF not lock!". We have not seen issues which lead the system to be completely stuck. However, when using HS200 at 200MHz it affects performance very little (~5%) but seems to run without any errors.

Description: In dual CAN operation, Apalis TK1 CAN may stop working, when error or collision happens on one of the busses.

Description: In a period between driver initialisation and interface bring-up, packets send on the bus with baud rate different then 1Mbps will be treated as invalid.

Description: The only difference from [01491101] CSI Camera Module 5MP OV5640 V1.1B to the old version V1.1A is about pin 12 (Master clock). This signal isn't used on V1.1B anymore as an oscillator is assembled on the V1.1B version. This improves EMI behavior and also works with SoMs which don't provide a master clock.

Description: Currently, the device tree specifies 2.5V as SGTL5000 VDDA. This is wrong, in practice, the board uses 3.3V Audio voltage as VDDA.

Description: Add support for the new V1.1A hardware revisions of the Colibri iMX6ULL products.

Description: Enforcing to build 32-bit binaries for native and portions thereof using -m32 in EXTRA_OEMAKE_class-native may lead to the following error when building e.g. u-boot-toradex:
cbootimage: Accessing a corrupted shared library

Workaround: The -m32 as specified in EXTRA_OEMAKE_class-native in recipes-bsp/cbootimage/cbootimage.bb of meta-toradex-tegra may be overridden to your liking. The same applies to the following as well:
meta-toradex-demos: recipes-devtools/mtd/mtd-utils_%.bbappend
meta-toradex-nxp: recipes-devtools/imx-loader/imx-loader_git.bb
meta-toradex-tegra: recipes-bsp/tegrarcm/tegrarcm.bb
meta-toradex-tegra: recipes-support/libcryptopp/libcryptopp_5.6.4.bb

Description: U-Boot typically tears down the display controller before handing control over to Linux. On LCD displays disabling pixel clock leads to a fading out effect with vertical/horizontal lines. Make sure to disable back light before booting Linux.

Description: Allow using MXM or SODIMM pin numbers to get or set GPIOs. This also allows for easier code porting from one to another Toradex module.

Description: In OE we build the device trees listed in conf/machine/xxx.conf (build-time variable KERNEL_DEVICETREE) and put them into the image. In the update.sh script we currently also have a variable KERNEL_DEVICETREE with a list of what to put on the update media. We could patch update.sh in OE during image creation time, so that update.sh contains the list from conf/machine/xxx.conf rather than having to maintain that list in both places.

Description: The apalis-tk1-mainline machine fails poweroff/shutdown and instead just reboots.

Workaround: The rocko-next branch of meta-toradex-tegra features a patch which disables the AMS AS3722 PMIC's auto power on when AC OK feature otherwise enabled by default and causing a reboot rather than full poweroff.

Description: In a SDK the symlink sysroots/armv7at2hf-neon-angstrom-linux-gnueabi/usr/lib/arm-linux-gnueabihf/tegra/libGL.so currently points to ./arm-linux-gnueabihf/tegra/libGL.so.1 which does not exist.

Workaround: Fix the symlink in the unpacked SDK: ln -fs libGL.so.1 .../sysroots/armv7at2hf-neon-angstrom-linux-gnueabi/usr/lib/arm-linux-gnueabihf/tegra/libGL.so

Description: SD card is not detected in U-Boot even after using "mmc rescan".

Workaround: Fix already available in 2016.11-toradex-next U-Boot branch.

Description: OpenCV4Tegra currently fails to build due to a missing dependency on libpng12.

Workaround: The libpng12 recipe has been re-added to the rocko-next branch of meta-toradex-tegra so OpenCV4Tegra is at least buildable again. However, for full OpenCV4Tegra support, we recommend using NVIDIA's JetPack resp. Linux for Tegra aka L4T as explained in the following article on our developer website:
https://developer.toradex.com/knowledge-base/installing-nvidia-jetpack-with-l4t-on-apalis-tk1

Description: Building 2.8b2 and earlier fails on Ubuntu 18.04 LTS.

Workaround: It works on Ubuntu 16.04 LTS.

Description: While BSP 2.8b1 enumerated PCIe on the Apalis evaluation board just fine BSP 2.8b2 may fail with the following error message:
busn_res: can not insert [bus 02-01] under [bus 01] (conflicts with (null) [bus 01])

Workaround: As a workaround you may just revert the following offending commit for now:
http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_4.9-1.0.x-imx&id=9a4bf05126f42c2632729ab0da503021d74ed454

Description: RS485 with using RTS to control the transceiver is not working. The RTS signal is not asserted during transmission. This is a regression in 2.8 BSPs (Linux kernel 4.9).

Workaround: Use ioctl to configure RS-485 and set the flag SER_RS485_RX_DURING_TX and SER_RS485_RTS_AFTER_SEND.

Description: When the UART without DMA (fsl_lpuart.nodma=1) overruns, the FIFO can get out of sync. Once out of sync, characters appear delayed only after new characters have been received.

Workaround: Reopen UART in case overruns have been detected (see /proc/tty/driver/fsl-lpuart). Use UART in DMA mode makes overruns less likely to occur and seems not to suffer issues on overruns.

Description: When migrating to the Linux kernel only the evaluation board device trees got updated, others may have diverged. This is especially the case with the Colibri camera device tree concerning e.g. RTC and new capacitive touch aka mxt.

Description: Currently the Toradex configuration block parser suffers an off by one issue potentially leading to spurious printout during boot e.g.
Model: Toradex V1.2A,
instead of
Model: Toradex UNKNOWN MODULE V1.2A.

Workaround: Fix available on 2016.11-toradex-next branch of git.toradex.com/u-boot-toradex.git.

Description: To get atmel mxt based touchscreens with GPIO connected reset line to work GPIO needs to be configured as an output with appropriate level separately.

Description: In order to allow our customers easy re-flashing of the touch controller configuration, we need to add the mxt-app as well as the proper configuration files to our images.

Workaround: https://www.toradex.com/community/questions/25020/view.html

Description: Integrate solutions proposed by Nvidia (L4T R21.7) and NXP to mitigate Meltdown and Spectre security vulnerabilities.

Description: The built-in/on-module Wi-Fi of the Colibri iMX6ULL 512MB Wi-Fi / Bluetooth IT module currently does not support the access point aka ap mode.

Workaround: You may force the mwifiex driver to create two interfaces during initialization
echo "options mwifiex driver_mode=0x3" > /etc/modprobe.d/mwifiex.conf
The interface mlan0 is a regular station interface while the uap0 interface can be used as an access point.

Description: Support USB 3.0 SuperSpeed on USBO1.

Workaround: Use USB 3.0 SuperSpeed on USBH4 for now. Alternatively, the mainline Linux kernel already supports USB 3.0 SuperSpeed on USBO1 as well as USBH4. You may also use the latest mainline Linux based demo image Apalis-TK1-Mainline_LXDE-Image as can be found at http://developer.toradex.com/files/toradex-dev/uploads/media/Colibri/Linux/Images/.
Such fix/support may now be found in the 2016.11-toradex-next U-Boot and toradex_tk1_l4t_r21.6-next Linux kernel branches of our git repositories.
Please note that one may not switch back to USB device functionality once USB 3.0 SuperSpeed host functionality has previously been used.

Description: The scrot recipe source is 404.

Description: The update to rocko (BSP 2.8b1) made automount fail for systems which do not trigger mounting through dbus/udisk2, i.e. which rely on udev rules.

Description: When building 2.8b1 building stress fails with "ERROR: stress-1.0.4-r0 do_fetch: Fetcher failure for URL: 'http://people.seas.harvard.edu/~apw/stress/stress-1.0.4.tar.gz'. Checksum mismatch!".

Workaround: Use 2.8b2 or remove the stress recipe under "meta-toradex-demos/recipes-support/stress/stress_1.0.4.bb" (this will use a fixed version of stress in openembedded-core/meta/recipes-extended/).

Description: In the demo images for BSP 2.8b1 the image viewer gpicview is not installed.

Workaround: Remove adwaita-icon-theme from BAD_RECOMMENDATIONS when building the image with openembedded.

Description: The thermal sensor driver on i.MX 7Solo does not probe successfully. There is no thermal sensor data available.

Description: Currently we use an LXDE/GTK+ based desktop for our demo images targetting modules which provide enough storage. Moving this to a LXQt/Qt5 based desktop. This aids customers who want to start developing a Qt5 based application.

Description: Adding pcie_aspm=off to kernel cmdline may fix problems with PCIe cards on Apalis TK1.

Description: Target is to achieve >2k msg/s (1Mbit/s) on both CAN channels.

Description: After building an image completely successfully, building the same image the next day without any changes leads to an error "do_image_teziimg: Error executing a python function in exec_python_func()".

Workaround: Make an unrelated change in any recipe to force recreation of the rootfs.

Description: Add an option to sepcify the 24bpp LVDS output format which is currently hard-coded to what NVIDIA calls 24.0 in their TRM. The alternate option would be called 24.1.

Description: We moved a while ago to a SPL/u-boot.img approach. The SPL runs in SRAM and configures the DDR-RAM, then it loads U-Boot proper into DDR and passes control. In the legacy update procedure, the recovery mechanism however stayed with a monolithic u-boot.imx binary which had to be built separately. Change also the recovery procedure to a download chain of first loading SPL and then u-boot.img. Note that the Toradex Easy Installer works that way successfully for some time.

Description: Switch to the generic compressed Kernel image type (zImage) instead of the legacy U-Boot specific uImage format.

Workaround: Please note that if one is updating from an earlier release one may have to manually fix the U-Boot environment to take this into account as mentioned on the community forum at https://www.toradex.com/community/questions/19860/bsp-28b2-fails-to-load-linux-kernel-due-to-uimage.html

Description: Upstream libusbgx accepted our implementation of OS Descriptor support. However, during review process the configuration schema changed slightly. Update libusbgx to the latest upstream version and use the new configuration format.

Description: The early sample hardware Apalis iMX6 V1.0A/B have a different UART pin-out which require a specific device tree. Starting with 2.8 Beta 1 we no longer provide these device trees.

Workaround: Use an older BSP or forward port the relevant changes between the device tree targeting the later HW vs. V1.0 HW.

Description: Enable "user debug" which enables kernel messages when a user process crashes due to an exception.

Description: Use ISO 8601 date format in the release_date property of the Toradex Easy Installer image JSON descriptor file.

Description: We are currently using 4.11 which is not really an LTS release however we opted to do that because we were relying on it for certain later features for certain Wi-Fi solutions we wanted to support. It may make sense to stabilise on an LTS release for the future.

Workaround: You may find our backports based on Linux kernel 4.14 here: http://git.toradex.com/cgit/backports-toradex.git/log/?h=toradex-4.14

Description: Apalis/Colibri T30 PWM was capped at 12.45kHz. We've increased it to 99.6kHz that can be further divided by integer divider.

Workaround: PWM peripheral input clock value can be increased to a maximum of 48MHz. Valid clock values can be calculated pwm_clk = 408MHz/N, where N=<1 , 128.5> in 0.5 increments

Description: Update our i.MX kernel to the 4.9-1.0.x-imx branch of the FSL community kernel aka linux-fslc-imx which includes NXP's latest 4.9.11 1.0.0 GA release changes.

Description: Update meta-lxde to build the latest LXDE sources. The latest lxpanel release doesn't work with our GTK+3.

Description: Add a -v parameter to fw_printenv/fw_setenv which outputs the U-Boot source version information.

Description: This release is identical to the previous 2.7b4 release and has passed full validation and verification for Apalis T30, Apalis iMX6, Colibri T30, Colibri VF50, Colibri VF61, Colibri iMX6 and Colibri iMX7.

Description: Bring-up Colibri iMX6ULL 512MB WB IT V1.0A.

Description: It would be very convenient to just be able to install NVIDIA's JetPack via Toradex Easy Installer once available for Apalis TK1.

Workaround: For now just stick to the rather cumbersome manual installation procedure: http://developer.toradex.com/knowledge-base/installing-nvidia-jetpack-with-l4t-on-apalis-tk1

Description: As we juggled around some of the pins the GPIO Tool also needs updating.

Description: Add support for on-module Wi-Fi.

Description: Camera support has been greatly improved by an update to the OV5640 driver from our camera partner Antmicro as well as NVIDIA's latest L4T R21.6 update.

Description:
Working on Colibri iMX6ULL 256MB V1.0A, demo image 2.7b4 image:
- U-Boot boot loader
- Environment storage in NAND
- Ethernet
- Framebuffer support
- GPIO from cmdline
- MMC/SD cards
- RAM size auto detection
- Splash Screen
- Toradex Colibri configuration block handling
- UARTA, used for serial console
- USB storage as host on USB host port
- Linux kernel
- Analog input via IIO framework, channel AD0 and AD1
- CAN via MCP2515 on Evaluation Board
- Ethernet
- Ethernet MAC address, optional custom setting from bootloader
- Framebuffer for parallel RGB displays
- Framebuffer console
- GPIOlib /sys/class/gpio
- I2C via /dev/i2c-X
- MMC/SD card mmc0, 4bit wide
- RTC (SoC and I2C)
- Resistive Touch
- SPI
- Splash Screen
- UARTA, used for serial console
- UARTB, UARTC
- Serial number and board revision in /proc/cpuinfo
- SoC unique ID in /sys/bus/soc/devices/soc0/unique_id
- Suspend LP1
- USBH host port
- USB host audio driver
- USB device Ethernet RNDIS
- USB device/host detection aka OTG support on USBC
- Watchdog via /dev/watchdog
- Update
- Legacy update scripts
- Toradex Easy Installer

Not working or not tested:
- U-Boot boot loader
- USB device/host switching
- Linux kernel
- Flexcan, not tested
- IrDA, not supported
- PWM, currently not working, SW issues
- RS485, not tested
- USB WiFi, drivers and firmware not installed
- On-Module Bluetooth/WiFi, not yet implemented
- Linux user-space
- GPIOtool, not yet implemented

Description: While the Apalis PWM3 pin is shared with the Apalis BKL1_PWM pin currently the former does not have the PWM pin muxing activated. Note that exporting PWM3 for raw sysfs access will therefore fail and one has to revert to using the pwm backlight.

Workaround: Change resp. pin muxing in the device tree. You may find a patch on our toradex_tk1_l4t_r21.5-next branch.

Description: Target is to achieve >2k msg/s on both CAN channels.

Description: The kernel does not know about rw,noatime. The string rw by itself is valid, and to pass additional arguments rootflags=noatime can be used. The kernel mounts ext3/ext4 file systems by default ro, hence so far the kernel mounted the rootfs read-only. The init manager systemd then remounts the rootfs after file system checking. This makes sense and does not add measurable boot time. Let the kernel explicitly mount ro on block device based rootfs. The root mount flag noatime is only relevant when re-mounting read-write, hence it needs to be present in /etc/fstab. UBIFS used on raw NAND devices has no user space file checking, hence there is no value to mount it in read-only first. Also mount time for UBIFS is larger, and mounting first read-only and then read-write has higher boot time (300ms, likely due to missing block cache). Let the kernel explicitly mount rw on raw NAND based rootfs. UBIFS has no atime support, hence no root mount flags needed.

Workaround: The change to initially read-only mounted root file system on Apalis TK1 requires the U-Boot emmcargs environment variable to be adjusted to run NVIDIA's JetPack resp. L4T as documented here: http://developer.toradex.com/knowledge-base/installing-nvidia-jetpack-with-l4t-on-apalis-tk1#Flashing_Latest_Boot_Loader

Description: If an image creates a rootfs which is exactly a multiple of 64 MByte and then if one executes in U-Boot 'run update' the detection that all 64 MByte chunks have been flashed fails and the update never completes. Note that the Toradex Easy Installer is not affected.

Workaround: Check the last rootfs chunk on the update media and create a zero length chunk with incremented number, e.g.: $ ls -l //colibri-imx6/ ... -rw-r--r--. 1 root root 67108864 Jul 12 15:13 root.ext3-106 -rw-r--r--. 1 root root 67108864 Jul 12 15:13 root.ext3-107 -rw-r--r--. 1 root root 48128 Jul 12 15:13 SPL ... $ touch //colibri-imx6/root.ext3-108

Description: We forgot to actually deploy the new device tree: imx6q-apalis-ixora-v1.1.dtb.

Workaround: Just checkout the Linux kernel sources, build the device trees and copy imx6q-apalis-ixora-v1.1.dtb to the update SD card into the apalis_imx6 folder. Then in U-Boot first 'setenv fdt_file imx6q-apalis-ixora-v1.1.dtb; saveenv' and do a 'run setudpate; run update_fdt'.

Description: Power I2C bus communication speed should be reduced to 100 KHz as our temperature sensor chip LM95245 is not rated for higher speeds.

Description: When migrating from older stable Colibri VF61 BSPs to later BSPs the MCC functionality got replaced by rpmsg. In order to be able to continue running existing eCos or MQX implementations on the M4 core the MCC functionality would be needed. A fix is pushed to the mcc kernel module: https://github.com/toradex/mcc-kmod/commit/083388fa5cce79c239988d61543322d91996aa8d

Description: Use the ext4 file system by default.

Workaround: Please note that if one is updating from an earlier release one may have to manually fix the U-Boot environment to take this into account as mentioned on the community forum at https://www.toradex.com/community/questions/16464/image-27b4-fails-to-mount-rootfs.html

Description: Currently various things may fail or behave strangely on certain modules if the config block is missing. Unify that behaviour by e.g. rather not allowing use of any features (e.g. Ethernet, RNDIS) at all in this case.

Workaround: Use the 'cfgblock create' U-Boot command to restore the config block. Alternatively we implemented similar functionality into our Toradex Easy Installer.

Description: After the RTC has been under-powered, some RTC deliver invalid date/time. The external RTC currently shipped on Toradex evaluation boards has a oscillator fail bit which indicates when RTC does not contain a valid date/time.

Description: Add support for Capacitive Touch Display 7" Parallel V1.0A.

Description: Use optimized RAM timings as we found some issues on some modules and in our temperature testing.

Description: The SGTL5000 driver in the Linux Kernel currently only supports one codec. The driver would need amending so that multiple codecs can be used. The issue is the statically created VDDD_LDO regulator.

Workaround: For i.MX based modules update to BSP 2.7b3 or later. With the backport of 'ASoC: sgtl5000: Fix regulator support' into the toradex_4.1-2.0.x-imx this driver limitation has been removed.

Description: USB Gadget schema fails to load on Apalis iMX6 Quad 2GB IT and Apalis iMX6 Dual 512MB modules which leads to RNDIS not working.

Description: There is now an experimental meta-snappy which allows regular Yocto project BSPs to support running Ubuntu Core snaps. Integrate this in our regular demo images.

Description: After the RTC has been under-powered, some RTC deliver invalid date/time. The external RTC currently shipped on Toradex evaluation boards has a oscillator fail bit which indicates when RTC does not contain a valid date/time.

Description: Trying to sdboot from an ext4 rootfs fails due to us defaulting to ext3. While the downstream T20/T30 L4T kernel has issues with ext4 later TK1 L4T should work just fine with it.

Workaround: Just change the sdargs to ext4 as follows: setenv sdargs 'ip=off root=/dev/mmcblk1p2 rw rootfstype=ext4 rootwait'

Description: Wakeup on CAN does not work in suspend mode with FlexCAN with 4.1.39 kernel.

Description: Depending on its DVFS state right before hardware reset the Apalis/Colibri T30 module may hang during a subsequent boot. Software reset seems not affected.

Workaround: Either power-cycle or make sure you are running at a higher DVFS state upon hardware reset. A fix for this called 'apalis/colibri_t30: improve vdd core pmic handling' may be found on our U-Boot 2016.11-toradex-next branch.

Description: As on our T30 designs there is a hardware over-temperature shut-off directly via PMIC we should check whether we could at least have an over temperature message shortly before that (e.g. 5 deg C).

Description: Fix the Colibri iMX7 display timings and allow setting them from the kernel cmdline.

Workaround: Use native mode node in device-tree

Description: Apalis iMX6: The gpio-tool can not read or change the current pinmuxing of the NANDF_DATA4 pin but rather the SD4_DAT6 pin got changed instead. Apalis TK1: Some of the Apalis GPIOs were not accessible with the gpio-tool.

Workaround: Don't use the gpio-tool for pin NANDF_DATA4 on Apalis iMX6.

Description: Since the move to the toradex_4.1-2.0.x-imx kernel poweroff fails powering off the PMIC once Linux reached halt.

Workaround: One could poweroff the carrier board by using a GPIO. http://developer.toradex.com/knowledge-base/gpio-(linux)#GPIO_PowerOff

Description: A few Colibri VF50/VF61 (IT) modules flashed with our latest beta BSP release V2.7Beta1_20170112 may hang during DRAM initialization (e.g. right after printing DRAM:). Attempting recovery with that same beta release will likewise fail.

Workaround: This is a software regression in U-Boot. Either compile U-Boot from our -next branch or use our latest stable BSP release V2.5_20151216 which has been fully validated & verified and does not exhibit this issue.

Description: The mmc-utils allow e.g. inspecting the current health and life time estimation of the on-module eMMC.

Description: The wrap-up script in the Toradex Easy Installer Colibri iMX6 V2.7 Beta 1 image does not allow to flash Colibri iMX6 modules.

Description: In the U-Boot version 2016.11 as shipped with our BSP V2.7 beta 1 the USB host mode initialisation (usb start) returns "Port not available." on both ports. This issue has been fixed and is available on our -next branch.

Description: After the RTC has been under-powered, some RTC deliver invalid date/time. The external RTC currently shipped on Toradex evaluation boards has a oscillator fail bit which indicates when RTC does not contain a valid date/time.

Description: On modules with newer kernels we set up a composite USB gadget with an RNDIS and a ACM USB endpoint providing a virtual Ethernet and serial link on the USB client port. Currently for Colibri VF a getty is spawned on the serial link giving you a login console on that connection. All other modules do not spawn a getty. We no longer spawn a getty on any module since some host platforms do have issues with composite USB gadgets.

Workaround: Please have a look at the following article on our developer website for more information: http://developer.toradex.com/knowledge-base/usb-device-mode-(linux)

Description: On Colibri VF50/VF61 in situations with frequent unexpected power-cuts there is a possibility of filesystem getting corrupted.

Workaround: Use a Read-Only Root Filesystem.

Description: Using PREEMPT_RT patch with Linux 4.4.21 on Colibri VF61 results in a freeze at boot time.

Workaround: Disable serial console either via kernel boot arguments or kernel configuration (CONFIG_SERIAL_FSL_LPUART_CONSOLE).

Description: The elf file format is supported by most commercial and free development environments and provides a standardized header for crucial information such as load address and entry point.

Description: Testing various SDIO based Wi-Fi solutions we observed it to completely lock-up the system.

Workaround: Find the following commit fixing this: http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_tk1_l4t_r21.5&id=20e255fde2d32d8bccd9e589fad4a2f663fcfb3a

Description: Test low-power/suspend modes.

Description: At this point the Linux suspend to memory and standby power states are supported ("mem"/"standby"). The standby mode uses a low power run state, whereas suspend to memory makes use uses the SoCs deep sleep mode (DSM). Wakeup from external GPIO as well as internal RTC have been verified working.

Description: With the move to morty all SysV initscripts have been installed which caused interference. This got fixed by finally getting rid of all SysV remnants.

Description: Using keypad driver causes kernel freeze on iMX7

Workaround: Use the generic GPIO driven matrix keyboard driver

Description: Include linuxptp in BSP image

Description: Prepare mainline kernel based machine with noueveau and wayland for Apalis TK1.

Description: The gpio-tool will allow to override pin muxing functionality and test GPIO input/output functionality.

Description: The gpio-tool will allow to override pin muxing functionality and test GPIO input/output functionality at runtime.

Description: Our current PEX 8605 errata workaround violates the PCIe clock and reset specification should no PCIe switch be present as e.g. the case on Ixora.

Description: Our current update procedure reads the rootfs payload in pre split files of 64 MB size. The number of chunks is limited to 89 resulting in a maximum size of 5.5 GB.

Workaround: - use the ums command in U-Boot to export the modules eMMC as a mass storage device. - deploy a minimum rootfs and install the 'big' payload after booting into Linux

Description: Updates our downstream U-Boot to 2016.11. This also includes a newer UBI/UBIFS stack which fixes issues such as "Error reading superblock on volume 'ubi0:rootfs' errno=-22" when using UBI fastmap in U-Boot.

Description: The Colibri iMX7 SODIMM 45 wake-up configures an internal pull-up while other modules use pull-down. Also some carrier boards use a external pull-down resistor. Configure an internal pull-down resistor on the pin do be consistent with carrier boards and other modules.

Description: Currently our update.sh script limits the partition size to around 8GB by default so even after our automatic resizing only 8GB of the 16GB of available eMMC space can be used.

Workaround: Manually modify the EMMC_SIZE calculation for apalis-tk1 in our update.sh script. Our upcoming Toradex Easy Installer will no longer suffer from this limitation.

Description: Closing the touch device while the touchscreen locks the closing task and leads to a task blocked kernel message.

Description: Add support to use signals from the K20 companion MCU connected to the MXM connector as GPIOs. Basic support will be non-interrupt safe (may sleep) and the latency will be similar to regular SPI GPIO expanders.

Description: When using UART with DMA it can lock up the UART sending path. The serial console might lock up completely.

Workaround: Disable DMA for UART.

Description: Documented here: http://developer.toradex.com/knowledge-base/using-k20-companion-mcu-on-apalis-tk1#Erase_Chip_Without_Reprogramming

Description: Newer distros like e.g. Fedora 24 use GCC version 6 as the host (native) toolchain. Our jethro based Yocto project build is not able to build the needed native tools, among them the cross compiler on such distros.

Workaround: Use a lightweight container with an older distro as documented on our developer website.

Description: Further U-Boot distro boot integration would allow booting off regular ARM distro's SD cards or USB mass storage devices aka memory sticks.

Description: Udisks development has stalled in 2014, udisks2 seems to be the successor. According to the OE recipes udisks2 also has less dependencies (notable lvm2, which adds almost 3.2MiB to the image and is not commonly used in embedded systems as well as sg3-utils, another 1.1MiB). Udisks2 also has a command line utility see: https://zeth.net/2014/05/28/modern_mounting_with_udisks2.html.

Description: So far U-Boot writes a BCB (Boot Configuration Block) crafted in a way to work around errata e9609. This also requires the U-Boot to be written in a way which only uses 3/4 of a page (implemented by the writeboot command). This mode has a drawback in practice: It cannot detect bad blocks marked with the usual bad block marker. Colibri iMX7 V1.1B and later do not suffer errata e9609. In order to overcome the limitations of the work-around, new U-Boot version will write the BCB in a new format which allows detecting bad block markers and use complete pages. This also allows to write the boot loader using standard nand write commands.

Description: As that whole source mirror stuff has been introduced rather haphazardly whoever did that also failed maintaining/updating it since V2.5 e.g. http://sources.toradex.com/V2.5/. The wohle process around this is currently unclear.

Workaround: http://git.toradex.com/cgit/meta-toradex-demos.git/commit/?h=jethro&id=a6c6fa422e9cf9586e0eb8aba40e0460513edf58

Description: Support Apalis UART4.

Workaround: Use UART1, UART2 or UART3 for now. Alternatively the mainline Linux kernel already supports all 4 UARTs.

Description: VisionWorks demo achieves 10FPS on Apalis TK1 & 30FPS on Jetson TK1. Please identify the cause and resolve it.

Workaround: Fixed by a combination of Norrin soctherm and Laguna cl-dvfs just like used on Jetson TK1: http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_tk1_l4t_r21.5&id=3c204d1590b9fcead7169c7f066f6918bcbde55f

Description: Bring-up type specific CSI-2 camera interfaces.

Workaround: http://git.toradex.com/cgit/linux-toradex.git/commit/?h=toradex_tk1_l4t_r21.5&id=4311e45350ad9199a62e5f37b211cee7de4dfb19

Description: Changing the default settings of multiplexed pins of the camera input allows saving up to 100mW of power.

Description: Using Colibri iMX7S freezes when using Viola. Could be a boot rom issue.

Workaround: Disable SNVS RTC in the device tree.

Description: When booting the M4 core using U-Boot (m4boot) rpmsg seems not to work (the kernel module loads but the initial test message does not seem to arrive/be recognized at the FreeRTOS side).

Workaround: Use the remoteproc method to boot the M4 core.

Description: BL_ON GPIO control is currently missing.

Description: Even if a USB controller is in peripheral mode, loading the USB Gadget schema fails with "Failed to start Load default USB gadget schema g1.schema.".

Workaround: Remove the command (ExecStartPost) copying the serial-number to the USB Gadget configuration in /etc/systemd/system/multi-user.target.wants/usbg.service.

Description: Our latest kernel is missing RS485 handling e.g. to use the RTS (CTS) output to control a RS485 transmitter.

Workaround: You may find the following commit from our older Linux kernel 3.10.17 as deployed in our embedded Linux BSP V2.4 Beta 1 (May 18, 2015) useful: http://git.toradex.com/cgit/linux-toradex.git/commit?h=toradex_imx_3.10.17_1.0.0_ga&id=82cf64948ddab0360fab876ee321b6191ed7258a

Description: Automatic USB Device/Host Detection will allow to use the USB port as either Device or Host (OTG). Note: The current default on the USB client port (USBC, OTG) is to be USB host. The reason for this default is that the Colibri iMX7S modules only provide this USB port, and USB host is typically used more often than client.

Workaround: If USB device is preferred as default set the device tree "dr_mode" property of the "usbotg1" node to "peripheral".

Description: As OE moves to GCC-6 we should provide our U-Boot and Kernel sources in a way that they can be built with gcc 6. This would allow customers taking our BSP and using it with a later Yocto project release.

Description: A bug in our GPIO Config Tool prevents the Apalis iMX6Q MXM Pin 130 to be accessible.

Description: The use of fdt_fixup should be unified across all our modules and document.

Description: All pins without a specific function should be configured for regular GPIO support.

Description: Separate the 'one size fits all' meta-toradex layer into BSP layers by SoC vendor and a software layer for the demo images.

Description: This release is identical to the previous V2.6 Beta 2 release and has passed full validation and verification for Apalis T30, Apalis iMX6, Colibri T30 and Colibri iMX6.

Description: u-boot reads the chip temperature and doesn't continue to boot if it's above 80°C. That doesn't make sense for industrial temperature range modules.

Description: Despite removing the conflicting UART2 Linux freezes on startup.

Workaround: None.

Description: The labels on special keys such as caps lock, enter or tab are missing.

Workaround: A fix is already available on the V2.6-next Meta-Toradex branch.

Description: Gstreamer may freeze when generating its initial database on some modules resulting in the following error message: (gst-plugin-scanner:683): GLib-GObject-WARNING **: cannot register existing type 'GstImxCompositorPad'

Workaround: The following gets you around this: mv /usr/lib/libgstimxcompositor.so.0.12.0 /usr/lib/libgstimxcompositor.so.0.12.0.orig gst-inspect-1.0 mv /usr/lib/libgstimxcompositor.so.0.12.0.orig /usr/lib/libgstimxcompositor.so.0.12.0 Alternatively one may uninstall libgstimxcompositor0 as follows: opkg remove --force-depends libgstimxcompositor0

Description: With the change to the DRM based Display Controller driver display timings are taken from a the Simple Panel driver. The Simple Panel driver does not include timings for the Fusion Capacitive Multi-Touch Displays currently.

Workaround: None.

Description: The move to the 3.14 kernel dropped the possibility to configure the LVDS timings and resolution from the kernel command line and forced the use of the device tree. This provides that feature again.

Description: On some modules in certain temperature ranges Ethernet might not work after suspend or after bringing down the network interface. The LED constantly blinks and receive/transmit errors might be reported. No frames can be received or sent in this state.

Description: A low percentage of modules don't boot reliably because of the bootrom not handling the eMMC correctly. This leads to non booting modules. Using reset solves the problem, a power-cycle mostly works too.

Workaround: Using different i.MX6 fusing options and eMMC configurations seems to solve the problem. For the time being you may evaluate this as described in the following article on our developer website: http://developer.toradex.com/software-resources/arm-family/linux/linux-booting#eMMC_Fast_Boot_Mode_ApalisColibri_iMX6

Description: Use long-term supported Linux kernel release 4.4.

Description: When using the unexport functionality through the GPIO sysfs interface, the pin keeps the last configured state. The typical expecation is that the pin is being disabled (set to Hi-Z).

Workaround: Set the GPIO as input before unexport.

Description: The USB host (USBH) bus disconnects all devices after resuming from LPSTOP (suspend-to-memory) low-power mode.

Workaround: Use unbind before entering suspend and (re)bind the driver after suspend. This method has been implemented as a systemd service (usb-resume.service). Alternatively, use standby mode instead.

Description: Vybrid's display controller (DCU) has more capabilities then currently being supported by the frame buffer driver. Implement a Linux DRM driver to support all the features of the DCU and leverage the advanced interfaces provided by the Kernel (KMS/DRI).

Workaround: Use the DCU frame buffer driver to provide display output.

Description: This version is identical to the previous beta version V2.5 beta 3.

Description: We are currently chasing a strange race condition/sequencing issue concerning eMMC seen on certain Colibri iMX6 modules. An affected module will continue to boot off the regular eMMC user area while our update scripts will update the one located in the boot area which may lead to quite some confusion/inconsistencies.

Workaround: Just manually enter the following from within U-Boot for now and you should be fine again:
Colibri iMX6 # mmc partconf 0 1 1 0
More information about this is available here: http://developer.toradex.com/software-resources/arm-family/linux/linux-booting#eMMC_Hardware_Boot_Area_Partitions_ApalisColibri_iMX6_and_ApalisColibri_T30

Description: Move the machine support of the i.MX 6 based modules into the community driven meta-fsl layer. <machine>.conf, U-Boot and Linux recipes are now available in meta-fsl-arm-extra starting with the OE 'jethro' release.
Note: The V2.5 BSPs which are based on the OE 'fido' release have the Toradex i.MX 6 machine support still in meta-toradex.

Description: Various UBIFS errors reported by Linux kernel especially while booting. Some errors might lead to root file system not being mountable.

Description: Upon boot after a watchdog reset the U-Boot boot loader gets stuck in SPL. Only a full power-cycle will recover the system.

Workaround: Our stable Embedded Linux BSP V2.3 from 20150320 does not exhibit this issue.

Description: Full UBIFS root file system can lead to a system which is not able to mount the root file system anymore.

Workaround: Take measures to avoid the root file system completely running out of space.

Description: Rarely after about 500 software reboot cycles the module locks up during boot.

Workaround: Just power-cycle again.

Description: On Ixora with set jumper JP2 the lower X8 USB host port (shared with the X9 micro USB port) is not reliably working. There seems to be a race condition in NVIDIA's USB OTG driver concerning the loading and binding of the USB device gadget driver which prevents Apalis USBO1 being operational in host mode.

Workaround: Disconnecting the USB device, removing the jumper JP2, connecting a USB micro cable to a PC, disconnecting the same again, jumpering JP2 again and connecting the USB device again should remedy the issue. Alternatively booting with JP2 removed and only connecting JP2 after boot also works.

Description: The USB ID pin shall be used for automatic USB device/host detection.

Workaround: Use implementation available in resp. -next branch for now.

Description: Currently DDR3L RAM is running at 533MHz. Further optimisations to achieve 800MHz speeds are required.

Description: Use long-term supported Linux kernel release 4.1.

Description: Support standby and suspend-to-RAM for newer (mainline) Kernel versions. True suspend-to-RAM (self-refresh) only works with newest hardware revision 1.2.

Description: Support Framebuffer in U-Boot to provide graphical output at bootloader time.

Description: Support the Kernels SoC bus which makes sure SoC peripherals are exported within a sub-directory in sysfs. That also allows to export SoC information such as Type and unique ID through sysfs.

Description: The current software AC97 driver supports audio playback and touch. It needs to be extended with receive capabilities to support analogue audio capture as well.

Description: GPIO support in U-Boot

Description: Use Analog Camera Adapter (ACA, formerly ACM) as Video Source.

Description: Using UART on Vybrid without DMA can lead to boot freezes when characters have been received during startup.

Workaround: Enable DMA mode to avoid this problem completely or avoid character transmission to the module during startup.

Description: Exporting of GPIOs using the sysfs interface fails with "Invalid argument". This is due to lack of GPIO pinmux configurations in the device tree. Currently, only few pins have pinmux information for GPIO use.

Workaround: The device tree needs to be extended to provide the pinmux for the required GPIOs.

Description: Support upgrade through USB device capabilities using the DFU device class.

Description: Current software AC97 driver only supporting touch requires extension for analogue audio to work as well.

Description: Implement optional MMC UHS support (enable using mmc_uhs=1 kernel command line parameter, requires V1.1A or later HW).

Description: The USB client implementation is unreliable and freezes communication from time to time (e.g. when using the USB client driver RNDIS/g_ether).

Description: USB Host/Client capabilities in U-Boot.

Description: The Colibri USB client aka USBC port shall be usable as a regular USB host port as well.

Description: Current Timesys kernel is considered obsolete. Migration to a later version is desired.

Description: Initial Colibri iMX6 BSP.

Description: The imx I2C driver does not support block read support. However, in order to use some I2C devices, the I2C bus adaptor driver needs to support SMBus block reads.

Description: Test and document the HW options to control an RS485 transceiver.

Description: No support for Ethernet on Apalis T30 in U-Boot.

Workaround: Use an Asix based USB to Ethernet dongle if you need Ethernet support in U-Boot.

Description: The PWM other than PWM do not work.

Description: Vybrid's internal RTC is not as accurate as expected (~2% drift).

Workaround: Update time regularly using NTP or use external RTC (/dev/rtc1).

Description: Assign the PWM to the LED-PWM class to have a consistent interface across modules.

Description: Currently when disabling the HDMI display controller by specifying the modedb option 'video=tegrafb1:off' from within U-Boot as Linux kernel boot argument the Tegra X driver complains with 'failed to initialize the display controller library' and refuses to start X at all.

Workaround: As a workaround one can remove the HDMI display controller's device node 'rm /dev/tegra_dc_1' and restart LXDM 'systemctl restart lxdm' from within Linux.

Description: Currently NFS booting mostly fails due to some timeouts in the Ethernet resp. USB stack.

Workaround: Build latest U-Boot sources from git.toradex.com.

Description: Implement RNDIS DHCP server for seamless Ethernet over USB device operation.

Description: Audio capture can stall causing stutter in captured stream.

Workaround: None. Await for update to driver.

Description: HDMI audio has an incorrect sampling frequency so the recorded audio stream is distorted.

Workaround: None. Await updated driver.

Description: Implement support for Vybrid SoC internal second Ethernet MAC.

Description: The main scheduling clock is non-monotonic increasing, which leads to time gaps in kernel log output.

Workaround: So far we haven't noticed any issues because of that. The real-time clock works as expected.