[Bug 1904306] Re: bcm2835-v4l2 does not detect/expose the second camera on RPi Compute Module 3+ in Ubuntu Server 20.04.1

2020-12-14 Thread Adam Black
Gah, I've found the issue.

Based on the investigation in this thread
https://www.raspberrypi.org/forums/viewtopic.php?f=98=174347=25#p1120478
I narrowed it down to dtparam=i2c_arm=on preventing the secondary camera
from being detected.

After commenting out dtparam=i2c_arm=on from /boot/firmware/syscfg.txt I
now have /dev/video0 and /dev/video1 for each of the supported cameras
on CM3+ in Ubuntu 20

[   14.133985] bcm2835-v4l2: V4L2 device registered as video0 - stills mode > 
1280x720
[   14.139034] bcm2835-v4l2: Broadcom 2835 MMAL video capture ver 0.0.2 loaded.
[   14.151264] bcm2835-v4l2: V4L2 device registered as video1 - stills mode > 
1280x720
[   14.156258] bcm2835-v4l2: Broadcom 2835 MMAL video capture ver 0.0.2 loaded.

Is it expected that this, remotely related, setting affects
functionality in bcm2835-camera.c? That's pretty brittle.

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Title:
  bcm2835-v4l2 does not detect/expose the second camera on RPi Compute
  Module 3+ in Ubuntu Server 20.04.1

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[Bug 1904306] Re: bcm2835-v4l2 does not detect/expose the second camera on RPi Compute Module 3+ in Ubuntu Server 20.04.1

2020-12-14 Thread Adam Black
On the Raspberry Pi OS side:

$ vcgencmd version
Aug 19 2020 17:41:31 
Copyright (c) 2012 Broadcom
version e90cba19a98a0d1f2ef086b9cafcbca00778f094 (clean) (release) (start_x)

$ uname -a
Linux raspberrypi 5.4.51-v7+ #1333 SMP Mon Aug 10 16:45:19 BST 2020 armv7l 
GNU/Linux

$ vcgencmd get_camera
supported=2 detected=2

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Title:
  bcm2835-v4l2 does not detect/expose the second camera on RPi Compute
  Module 3+ in Ubuntu Server 20.04.1

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[Bug 1904306] Re: bcm2835-v4l2 does not detect/expose the second camera on RPi Compute Module 3+ in Ubuntu Server 20.04.1

2020-12-09 Thread Adam Black
Vincent, could you pls help triage and remedy this?

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Title:
  bcm2835-v4l2 does not detect/expose the second camera on RPi Compute
  Module 3+ in Ubuntu Server 20.04.1

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