RT - Kernel Jetson TX-NX

Autonomous Machines Jetson & Embedded Systems Jetson TX2
#1

Hi,
I need to compile an RT kernel for a Jetson TX2-NX, I followed the explanations here to apply the patch. However during the compilation phase of zImage different compile errors appear, such as this:

/home/rpo/RT-Kernel/build/kernel/nvgpu/drivers/gpu/nvgpu/os/linux/platform_gk20a_tegra.c: In function ‘gk20a_tegra_get_emc_rate’:                                   
/home/rpo/RT-Kernel/build/kernel/nvgpu/drivers/gpu/nvgpu/os/linux/platform_gk20a_tegra.c:170:13: error: implicit declaration of function ‘clk_get_rate’; did you mean ‘clk_hw_get_rate’? [-Werror=implicit-function-declaration]   
gpu_freq = clk_get_rate(g->clk.tegra_clk);
           ^~~~~~~~~~~~                                                                                                                                                                                                          
           clk_hw_get_rate

error taken at random from the entire error panel

These errors obviously block the rest of the Kernel installation (which is not very cool)

So I wanted to know if anyone knows why this kind of error occurs ?

Thank you in advance for your answers

#2

Hi @QC_RPO,

Welcome to the NVIDIA Developer forums! Looks like you posted in the wrong category, I will move this to the Jetson TX2 forum so support has visibility.

#4

Have check this document to use Linaro 7.3.1 2018.05 toolchain.

https://docs.nvidia.com/jetson/archives/l4t-archived/l4t-3261/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/kernel_custom.html#

#5

Thank you !

#6

Yes, i’m using this toolchain for compile the Kernel.
[UPDATE] By carefully following the NVIDIA doc, the following error appears:

cp -u   arch/arm64/boot/dts/
cp: Missing target file operand after 'arch/arm64/boot/dts/'

But these directories are generated (I think) by the Makefile, knowing that this time there are no other errors

#7

What does this command for?

#8

This command is execute into supplied Makefile.
And it’s more of an error (or log) message provided during kernel compilation.

(Thank you for you responses)

#9

[Update]:
When following these instructions provided by NVIDIA, the following errors occur.

/path/to/kernel/kernel-4.9/arch/arm64/boot/dts/Makefile:119: target 'arch/arm64/boot/_ddot_'  given more than once in the same rule

This solution is described on another topic but in my case it doesn’t work, I admit I’m a bit at a loss for a solution. Can anyone think of a solution?

#10

So the instruction at NVIDIA Jetson Linux Driver Package Software Features : Kernel Customization | NVIDIA Docs is not working on your case?

#11

Exactly, in my case this instruction is not working.

#12

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

  1. What’s the version?
  2. Did you confirm without problem before apply the rt patches?
    3.Run below sh file to apply the rt-patches instead of manually
    …/kernel/kernel-4.9/scripts/rt-patch.sh --apply-patches
#14

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.