[libcamera-devel] Compatibility with cameras

[Laurent Pinchart]

Hi Guido,

On Thu, Feb 17, 2022 at 05:00:23PM +0100, Guido Körber wrote:
> Is there a simple way to check if the hardware is present even if the camera is not detected by software?
> I have set up a prototype with a hand soldered connector and would like to know if I did all the wiring correct.

You can use i2cdetect and i2cget ([1]) to talk to the sensor. You may
need to first enable power by toggling the corresponding GPIO, which can
also be done from userspace ([2]). Checking video transmission is more
difficult, you will need to get at least the kernel driver for the
sensor and Unicam up and running.

[1] https://manpages.debian.org/unstable/i2c-tools/i2cdetect.8.en.html
[2] https://manpages.debian.org/experimental/gpiod/gpioset.1.en.html

> > Am 17.02.2022 um 14:09 schrieb Kieran Bingham:
> > Quoting Guido Körber (2022-02-17 13:04:18)
> >> 
> >> I want to use libcamera on Raspberry with a camera that is not
> >> explicitly supported by libcamera but does generic CSI-2. Will this
> >> work, or do I need a camera specific plugin or something else?
> > 
> > You will likely need to make sure you have a relevant kernel driver, and
> > may likely need to do some updates to libcamera, to manage the
> > CameraSensorHelper classes.
> > 
> > You might also then want to follow the Raspberry Pi ISP tuning
> > procedures.
> > 
> > https://datasheets.raspberrypi.com/camera/raspberry-pi-camera-guide.pdf
> > 
> > But yes, you should be able to get it to work.

-- 
Regards,

Laurent Pinchart