Hi everyone,

+ Ricardo and Heiko in CC as the driver originators and rockchip pros...

I'm reaching out to you based on a discussion with Sebastian Fricke, who 
was working on the OV13850 driver for the v5 kernel. I tried getting the 
IMX214 finally to work on the RockPro64 from Pine64, which only works on 
Android so far and I need to get that done on Mainline Linux (I did not 
find anyone who managed that and reported about it). However, I'm also 
totally stuck.

The RockPro64 runs Dietpi, which is essentially Armbian + a few tweaks.
I'm using the Armbian 5.15.18 kernel, so mainline, with a custom device 
tree, which in the first place powers the MIPI ports. I suspect it is a 
bad idea to have one pinctrl as a placeholder for 4 converters, however, 
I'm not too deep into proxying in the devicetree, so here's the current 
status:

https://pastebin.com/vs277ex0

The camera is connected to the first MIPI port. The kernel boot logs 
look ok to me (except for the cyclic dependency issue, but I think that 
does not matter much).

https://pastebin.com/hvhdEfxm

Without the camera configured in the device tree, it shows up as 0x0c 
device on the #1 I2C bus, which is a bit suspicious to me given the 
addresses in the documentation and the info given in the kernel 
documentation.

However, I essentially followed the description according to this guide 
to set up the RKISP:

https://linuxtv.org/downloads/v4l-dvb-apis/admin-guide/rkisp1.html

using this:

https://pastebin.com/ZqWC5vhC

It looks like this (see also png attached).

https://pastebin.com/MfTNp5Pd

However, the IMX214 driver does not complain until that point and seems 
to do right. I expected that at least something happens, however it does 
not. The last command does this:

VIDIOC_STREAMON returned -1 (No such device or address) and this is the 
kernel output

[1509.435228] imx214 1-000c: write_table error: -6
[1509.435868] imx214 1-000c: could not sent common table -6

There is no more info given, even if I do some "echo 0x3F > 
/sys/class/video4linux/v4l-subdev0/dev_debug" to the subdevs.

Here's the IMX214 documentation btw. that I got through a detour from CSDN.

https://www.dropbox.com/sh/5d3mp2akr3kmu7t/AADaAsSxZu2kVSIfEceStwuoa?dl=0

I'm not entirely sure, but there is something wrong somewhere and I 
can't find out if it is with the driver, the RKISP or anything else. 
Here's what "v4l2-ctl -d /dev/v4l-subdev3 --all" gives - not sure but 
shouldn't it show supported resolutions or something?

https://pastebin.com/ckAFPbAs


Any help would be appreciated.

Best
Clemens