No support for t194 SOC Family in tegra-defconfig with L4T 34.1.x?

[J4n_J4ns3N]

Hello,

i try to build a kernel from source with the new L4T Releases 34.1.x (contained in Jetpack 5.0.x DP) for use with a Xavier NX (production).

When I checked the default config (created with make tegra-defconfig), i recognised that the only SOC downstream option drivers that are included is the one for the t234 family (CONFIG_ARCH_TEGRA_23x_SOC).
Building the kernel (following Kernel Customization — Jetson Linux Developer Guide 34.1 documentation) with this config suceeds, but it won’t fit for the Xavier NX i want to boot on with.

When including the t194 drivers (ARCH_TEGRA_19x_SOC), the build fails exactly at the same point as posted in Building kernel 5.10 from nvbuild.sh script - Jetson & Embedded Systems / Jetson Xavier NX - NVIDIA Developer Forums.
No other config changes were made!

The Known Issues Section of the r34.1.1 Release Notes mention:

3499398 GPIO configuration utility does not work as expected in Linux 5.10 kernel included
in Jetpack 5.0 DP release

Does this mean no compilation actually possible due to incompatible pinctrl/pinmux implementations?
How can i successfully build a 5.x kernel for my Jetson Xavier NX?

Thanks in advance!

[shreyas.pa]

I had this issue since I was not feeding pinmuxing information to Xavier NX. When I pass a proper .cfg file with pinmux information, the issue is gone.

[ShaneCCC]

Suppose the source should able support t194/t234 in default configure.
Please don’t change any kernel configure to build the kernel to try.

[J4n_J4ns3N]

how do you pass pinmux data to the kernel build process?

Pinmux is used during flashing, not during compilation of the kernel AFAIK.

[shreyas.pa]

Yes specify a proper pinmux.cfg file while flashing the board.

[J4n_J4ns3N]

I referred to the build process of the kernel, not the flash process of the system image.