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

BSP-Yocto-NXP-i.MX93-PD24.2.0          2024-10-08
=================================================

- Linux NXP Vendor Kernel v6.6.23-2.0.0-phy8 (based on NXP tag lf-6.6.23-2.0.0)
- U-boot v2024.04-2.0.0-phy6 (based on NXP tag lf-6.6.23-2.0.0)
- Yocto 5.0 LTS (scarthgap)
- Qt 6.7.0
- RAUC 1.11.3

Tested Yocto Images:
--------------------
- phytec-headless-image
  * phyboard-nash-imx93-1
  * phyboard-segin-imx93-2

- phytec-qt6demo-image
  * phyboard-nash-imx93-1
  * phyboard-segin-imx93-2

Build Environment:
------------------
- Ubuntu 22.04 64-Bit

Features:
---------
- Added support for SOMs with low-cost i.MX9302 (900 MHz CPU) SoC variant.
- Added support for PEB-WLBT-05 (WLAN) adapter on phyBOARD-Segin-i.MX 93 board.
- Added support for audio when using PEB-AV-10 Audio/Video adapter and the
  phyBOARD-Nash-i.MX 93 board (rev 1616.1).
- Added support for VM016 cameras (color and BW) on phyBOARD-Nash-i.MX 93 board.
- Added support for PWM fan on phyBOARD-Nash-i.MX 93 board.
- Added JTAG device-tree overlay 'imx93-phyboard-nash-jtag.dtbo' for the
  phyBOARD-Nash-i.MX 93 board. Customers can load and use this overlay for JTAG
  debugging.
- Using common U-Boot 'imx93-phycore_defconfig' for both phyBOARD-Segin-i.MX 93
  and phyBOARD-Nash-i.MX 93 boards.
- Using single Linux defconfig 'imx93_phytec_defconfig' instead of config
  fragments.

Issues fixed:
-------------
- Improved signal integrity of eMMC and CAN1 interfaces (drive-strength).
- PEB-AV-10 Audio/Video adapter device-tree overlays got renamed to
  'imx93-phyboard-nash-peb-av-10.dtbo'.
- Occasional system freeze has been mitigated by disabling CPU idle management
  (by adding cpuidle.off=1 to kernel command line). NXP has also recommended
  disabling CPU idle management, as especially in extended temperature range
  (e.g. at -40 C) switching off CPUs can have unexpected effects.
  Please note, that by disabling CPU idle management power consumption of the
  SOM increases (10-50 mW average, 300 mW peak).
- Resource table (rsc_table) offset for i.MX93 M33 core has been updated from
  0x2021f000 to 0x2021e000 (rev A1 silicon). BSP provided M33 core demos from
  NXP can now be successfully evaluated on the phyCORE-i.MX 93 SOMs.

Known Issues:
-------------
- Qt packages qt3d and qtdatavis3d cannot be build for the SDK and were
  therefore removed from the i.MX 93 SDK.
- On phyBOARD-Nash-i.MX 93 carrier-board (rev 1616.0), Audio with PEB-AV-10 A/V
  adapter is broken due to HW bug.
- On phyBOARD-Nash-i.MX 93 carrier-board (rev 1616.0 and rev 1616.1), Backlight
  with PEB-AV-10 A/V adapter is ON by default after power-reset due to HW bug.
- When using DMA for lpuart1 (Debug console) data loss can be observed. Thus
  DMA is disabled for lpuart1 UART port.
- partup packages built with the ampliphy-vendor-rauc distro contain a faulty
  layout configuration. The filesystem of the config (and app) partition is
  falsely set to null. There is already a fix in meta-phytec, setting the
  filesystem type of the config and app partitions to ext4 as before, coming in
  the next release. partup packages built with the distro ampliphy-vendor and
  ampliphy-vendor-xwayland are not affected.

Notes:
------
- In Yocto, kernel recipe was renamed from 'linux-imx' to 'linux-phytec-imx'.
  Git repository was moved to https://github.com/phytec/linux-phytec-imx.
- With phyBOARD-Nash-i.MX 93 rev 1616.1 the logic of the the backlight signal for
  the PEB-AV-10 A/V adapter was inverted (from active-low to active-high).
  The BSP release PD24.2.0 implements that new logic.
  When using PD24.2.0 on a phyBOARD-Nash-i.MX 93 rev 1616.0 a customer must change
  logic again to active-low to get backlight working.