Release Notes unified i.MX 91/93 Linux BSP
==========================================

BSP-Yocto-NXP-i.MX93-PD24.1.0          2024-01-31
=================================================

- Linux NXP Vendor Kernel v6.1.36_2.1.0-phy1 (based on NXP tag lf-6.1.36-2.1.0)
- U-boot 2023.04_2.1.0-phy1 (based on NXP tag lf-6.1.36-2.1.0)
- Yocto 4.2.2 (mickledore)
- Qt 6.5.0
- RAUC 1.10.1

Tested Yocto Images:
--------------------
 - phytec-headless-image
   * phyboard-segin-imx93-2

 - phytec-qt6demo-image
   * phyboard-segin-imx93-2

Build Environment:
------------------
 - Ubuntu 20.04 64-Bit

Features:
---------
- Added support for phyCORE-i.MX 93 SOM with i.MX 93 A1 silicon revision (SOM
  revision 1607.1, yocto machine phyboard-segin-imx93-2). It replaces previously
  supported SOM with i.MX 93 A0 silicon revision (SOM revision 1607.0, yocto
  machine phyboard-segin-imx93-1).

  NOTE: Yocto machine phyboard-segin-imx93-1 is NO LONGER SUPPORTED!

 - Added the following U-Boot features:
        * Enable redundant environment in MMC
        * Add overlays support
        * Add watchdog support
        * Add Ethernet support
        * Ethernet MAC addresses are now read from the fuses
        * Add 2nd DRAM FSP for frequency scaling
        * Add USB support
        * Add TMU (thermal) support
        * Add PHYTEC EEPROM SOM detection
        * Add eMMC boot support
        * Add RAUC boot support

 - Added the following Linux kernel features:
        * Add heartbeat LED support
        * Add watchdog support
        * Add PXP (graphics) support
        * Add PEB-EVAL-01 overlay
        * Add i.MX 93 LPM (frequency scaling) support
        * Add RPMsg support
        * Add eMMC support

Issues fixed:
-------------
- Device-tree overlays are now automatically applied. Additional ones can be
  specified or disabled in /boot/bootenv.txt file by editing overlays variable.
- Ethernet suspend issue has been fixed. Now, Ethernet works after device has
  been woken-up from suspend.
- Device enters suspend mode without any 'cfg80211' dependencies
- Thermal-Monitoring has been fixed. SoC temperature grade variant (i.e.
  Consumer, Industrial) is now read from the fuses, and the temperature range
  is selected accordingly.

Defeatured:
-----------
- Support for "phyBOARD-Segin i.MX 93" with A0 silicon revision (SOM revision
  1607.0 yocto machine phyboard-segin-imx93-1) has been dropped!
  It is possible to activate support for A0 silicon revision, but this is not
  recommended by the chip vendor and unstable system behavior can be observed.
  Please contact PHYTEC sales team to obtain i.MX 93 A1 SOM revision with the
  new A1 silicon.

Known Issues:
-------------
- In rare occasions a system freeze can be observed, which results in a
  watchdog triggered reboot, during iperf3 stresstest in a "client mode" of
  ETH2 (PHY on module). When iperf3 stresstest is set to "server mode" this
  effect can not be observed anymore.
- SDK built with Yocto does not contain all the tools required to build Qt 6
  applications. However for building Qt 6 applications using the usual yocto
  build-flow (i.e. built with bitbake and recipes) everything is in place.
- BSP provided M33 core demos from NXP are not working on A1 revision of i.MX93
  due to ROM differences between A0 and A1 silicon revisions.

Notes:
------
- Only compressed flash images are built (i.E. only "*.wic.xz" instead of
  "*.wic"). Consequently the tool to flash an image to an SD card must be able
  to handle ZIP-compressed "wic.xz" images. That is default for Linux, but not
  on Windows. On Windows use for example: https://etcher.balena.io/
- Added partup support to provide partup packages as an alternative way to
  traditional WIC images for the initial flashing process. Using partup allows
  for an easy and fast way to flash and configure eMMC and SD card devices in
  one step. For instructions on how to use partup, please refer to the first
  chapters of our BSP manual.