Hi 
I managed to get my usb camera taking pictures alright on Orange PI PC+ (VERSION=5.37.180112), 

$uname -a

Linux orangepipcplus 3.4.113-sun8i #4 SMP PREEMPT Wed Nov 22 13:45:28 CET 2017 armv7l armv7l armv7l GNU/Linux

And I even got the GC2035 working sort of with:
$sunxi-pio -m "PG11<1><0><1><1>"
$modprobe gc2035
$modprobe vfe_v4l2
But I have no /dev/media0 or /dev/media1. So I cannot re-focus the web camera (that supports it; Logitec C920).

 

I can re-focus my usb camera on my Orange PI Prime (VERSION=5.37.180120)

using  

$uvcdynctrl -v -d /dev/video0 --set='Focus (absolute)' $COUNT. Where i also have the /dev/media0 (or 1 if I plug in 2 cams)

So why does it not work with Orange Pi PC+? I know it is a different kernel & chipset.

Orange PI Prime says

$uname -a

Linux orangepiprime 4.14.14-sunxi64 #61 SMP Sat Jan 20 03:18:42 CET 2018 aarch64 aarch64 aarch64 GNU/Linux

(did not get a /boot/dtb tree for 4.14.15 or 4.14.16 so I hang around with the old one)

(Actually I find Orange PI Prime more mature than Orange PI PC+, with less number of crashes especially after tuning down ram speed.) 

Both are primary used for controlling 3d printers with octoprint, and taking snapshots with fswebcam.

Try this build: https://dl.armbian.com/orangepipc/archive/Armbian_5.38_Orangepipc_Debian_stretch_next_4.14.14_desktop.7z 

 

Still testing.

Thank you Igor much appreciated. Yes I got /dev/media0 (for the USB camera). 

However I got three small problems left, probably due to this image in naming is for Orange Pi PC, not Orange Pi PC+

1) how do I enable wifi? It was mostly working on the previous kernel (minor hickups a couple of times per day)

2) how do I enable the GC2035 camera? It was working on the previous kernel. Now the module is missing. I haven't compiled kernel since 2.4 but I guess I will have to dive into bitbake/yocto.

3) how do I get my eMMC back? It was working out of the box on the old kernel. (And I got the old kernel on the eMMC)

old kernel gave:

$grep mmcblk1 dmesg.old-kernel
 mmcblk1: mmc2:0001 8WPD3R 7.28 GiB
[    1.315152] mmcblk1boot0: mmc2:0001 8WPD3R partition 1 4.00 MiB
[    1.315384] mmcblk1boot1: mmc2:0001 8WPD3R partition 2 4.00 MiB
[    1.316269]  mmcblk1: p1
[    1.317898]  mmcblk1boot1: unknown partition table
[    1.319265]  mmcblk1boot0: unknown partition table
[    1.319493] mmcblk mmc2:0001: Card claimed for testing.
[    7.509553] EXT4-fs (mmcblk1p1): mounted filesystem with ordered data mode. Opts:                       (null)
[   10.316476] EXT4-fs (mmcblk1p1): re-mounted. Opts: commit=600,errors=remount-ro
but noting now.

$dmesg|grep mmcblk1

$