[Bug 2083775] [NEW] Seeds and metapackages for Tegra

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Hi,

Canonical maintains a set of kernels and images for NVIDIA Tegra Orin
based systems for Ubuntu 22.04/jammy in collaboration with NVIDIA, with
intentions to also support 24.04 and probably other series in the
future.

The image definition for Tegra images is fairly simple:
https://git.launchpad.net/ubuntu-images/tree/ubuntu-server-tegra-igx.yaml?h=jammy
but has to manually pull a number of packages such as:
- nvidia-tegra-defaults (currently just ships a GRUB config to expand the console= parameters to include the specific Tegra serial console)
- grub + shim as to have a path to update these boot artifacts on installed systems

Contrast this to RPi images which just refer to seeds
https://git.launchpad.net/ubuntu-images/tree/ubuntu-server-pi-arm64.yaml
this is because there are RPi specific seeds pulling in the bootloader – flash-kernel  (ubuntu-seeds/platform/raspi-common) – and raspi specific packages – rpi-eeprom (same seed)

Similary, the Tegra images don't currently include a WiFi stack, but
just like RPi, they should as the Tegra system-on-modules come with a
WiFi chip that we want to enable out of the box in Ubuntu. Here again,
this is achieved in Raspberry Pi images by listing wpasupplicant in the
raspi-common seed used in both desktop and server images.

Hence, I think we need to add tegra seeds similar to the raspi ones, and
similar metapackages. In the future, probably the bootloader bits should
be selected through some more scalable mechanism somewhere between
ubuntu-image and seeds. Wireless support should perhaps be in some kind
of Ubuntu for IoT seed or similar, as to not clutter server, but share a
common definition of how we expect to deliver WiFi in RPi like embedded
systems.

We also want to have Tegra seeds to have a mean to pull packages into
main, such as nvidia-tegra-defaults.

Best,

** Affects: ubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: New

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Seeds and metapackages for Tegra
https://bugs.launchpad.net/bugs/2083775
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