[nanoPC-T4 USB type-c port doesn't work with Buster current 5.4.31]

1 hour ago, Igor said:

 

According to the support contract, this is not a problem.

 

Porting features from fixed private to the mainline kernel is far from cheap and simple. Its expensive work which you cover in exactly 0%. Hire someone to do this job and share the work. Why would we need to do that? 

 

I think you misunderstood the tone. It wasn't a demand, it was an observation.

Although ... it would be nice if there were some sort of release notes or FAQ entries for each build (Bionic, Buster, Focal and kernels 4.4.x, 5.x.x) outlining what works and what doesn't. Users could then make an educated decision beforehand, instead of discovering later that <hardware thing> doesn't work yet in a specific release/kernel.

[nanoPC-T4 USB type-c port doesn't work with Buster current 5.4.31]

The USB-C port is NOT working at all on 5.7.15 either. I'm specifically concerned about storage. Works fine with Ubuntu 18 and 4.4 kernel. 

[[Development] RK3399 media script]

On 2/7/2020 at 9:10 AM, Secarius said:

Hi did anyone managed to use the eDP port on the Nano PC T4?

 

I couldn't get it to work at all. IMO, Friendly generally has sketchy hardware compatibility and only loosely adheres to specs and standards.

[rk3399-bluetooth.service is still present in "systemctl list-jobs"]

What I ended up doing for NanoPC T4 is disable the systemd service and in rc.local:

/usr/bin/brcm_patchram_plus_rk3399 --enable_hci --no2bytes \
  --use_baudrate_for_download --tosleep 200000 --baudrate 1500000 \
  --enable_lpm --patchram /lib/firmware/brcm/BCM4345C5.hcd /dev/ttyS0 &

 

> ... bluetooth doesn't work and I've got a flood in Rock Pi 4 syslog

 

The --enable_lpm stops the flood and allows it to more-or-less complete.

 

FWIW I haven't yet seen an Armbian 5.x kernel where both wifi and bluetooth actually worked on the T4, but I haven't tried 5.x since I started messing around with brcm_patchram so maybe ... 

 

[rk3399-bluetooth.service is still present in "systemctl list-jobs"]

After bootup I get

 

# systemd-analyze
Bootup is not yet finished. Please try again later.

 

# systemctl list-jobs
JOB UNIT                                 TYPE  STATE
142 systemd-update-utmp-runlevel.service start waiting
114 rk3399-bluetooth.service             start running  
  1 multi-user.target                    start waiting

 

If I stop rk3399-bluetooth.service everything completes and list-jobs is clean, but then bluetooth stops working. I've tried a few things in the rk3399-bluetooth unit file but so far I've not been able to find a way to make systemd happy and finish cleanly.

 

By the way, in the service file it uses "--use_baudrate_for_downloade", typo and should be "--use_baudrate_for_download"

 

[[Development] RK3399 media script]

Is there any chance of an update for this kit? An additional kit for Buster would also be most welcome, if possible.