Hello,
I’m trying to install drivers for the google coral M2 on banana pi m4. I’m using the BPI-M4/BPI-W2 Ubuntu Server 16.04 image from the bpi website. Following the get started guide from google (https://coral.ai/docs/m2/get-started), it looks like the installation script from google is looking for kernel headers
any idea how I can manage this problem? I’m quite new to linux but I like to learn
Which kernel have you running (run “uname -a” in your system)?
Maybe you can download sources for this kernel from github to /usr/src/linux
Hi Frank, thanks for your help. The kernel is 4.9.119-BPI-M4-Kernel and I think I can download it from here https://github.com/BPI-SINOVOIP/BPI-M4-bsp. Browsing through the files I cannot find the headers, to get them should I compile it? Never did that but I hope I can find some guide
headers are the source of linux kernel…
I think you should download content of linux-rtk to the folder i mentioned above and try again
Maybe foldername have to be
/usr/src/linux-headers-$(uname -r)
But structure imho is normal linux-source
just tried with either linux or linux-header-etc but no luck sadly 
the error is the same, kernel source for this kernel does not seem to be installed
something like this does not work? Do not try to create a folder with $(…) it is evaluated to your kernel version
git clone https://github.com/BPI-SINOVOIP/BPI-M4-bsp
ln -s $(pwd)/BPI-M4-bsp/linux-rtk /usr/src/linux-headers-$(uname -r)
Can you post the script containing the error-message? Then i can look for condition which brings up the message
yup I tried to git clone and made the symbolic link to /usr/src I don’t know how to locate the installing script, maybe inside the .deb package? I tried to decompress it but I could not find any cue, nothing in pre/post scriptsgasket-dkms_1.0-9_all.deb (43,6 KB)
It looks like the package have installed linux headers for 4.4.111-snapdragon…just try to compare with your github-folder…else i have no more idea…
Maybe the source/build-symlink in /lib/modules/$(uname -r)
Hi Frank, github content files are very similar with snapdragon stuff. About modules I’ve already source/build inside the correct kernel folder.
I’m writing with google coral support, If I can find a solution I’ll let you know. For the moment thank you very much for your help
Do you think would be a possibility recompile the kernel with coral module?
when I try to load the coral drivers (gasket, apex) I get these errors:
[ 418.976141] gasket: module_layout: kernel tainted.
[ 418.976170] Disabling lock debugging due to kernel taint
[ 423.373659] apex 0000:01:00.0: can’t enable device: BAR 0 [mem 0x00000000-0x00003fff 64bit pref] not claimed
[ 423.373699] apex 0000:01:00.0: BAR 2: no space for [mem size 0x00100000 64bit pref]
[ 423.373712] apex 0000:01:00.0: BAR 2: failed to assign [mem size 0x00100000 64bit pref]
[ 423.373730] apex 0000:01:00.0: BAR 0: assigned [mem 0x98064000-0x98067fff 64bit pref]
[ 423.374483] apex 0000:01:00.0: enabling device (0000 -> 0002)
[ 423.375621] apex 0000:01:00.0: Cannot get BAR2 base address
[ 423.375963] apex 0000:01:00.0: error adding gasket device
[ 423.376161] apex: probe of 0000:01:00.0 failed with error -12
any idea if is possible to fix it? thanks
I have the M.2 Dual Edge TPU. inserted in the M.2 slot.
The “2020-05-18-ubuntu-18.04-mate-desktop-bpi-M4-aarch64-sd-emmc.img” (posted on this forum ) img running on an inserted SD gets me to a point where the TPU is detected via “lspci -x | grep 089a”
There are no errors during install but I don’t see “ls /dev/apex_0” when following the listed coral.ai steps
UPDATE
No luck whatsoever!
@sinovoip could you please look into Coral M.2 TPU’s compatibility on your BPI-M4. You’ re product is one of the few SBCs that have an M.2 E key. If you’ re team can get the Coral M.2 TPU running we’ll use and promote your boards in our project.