v4l2-related tracedump appears in kernel log (dmesg) during boot

[jose1711]

Describe the issue you are experiencing

During boot process the system logs the following lines:

$ dmesg
..
..
[   67.600202] WARNING: CPU: 0 PID: 3174 at drivers/media/common/videobuf2/videobuf2-core.c:1627 vb2_start_streaming+0xec/0x160 [videobuf2_common]
[   67.600218] Modules linked in: rfcomm nft_chain_nat nf_conntrack_netlink xfrm_user xfrm_algo nft_compat nf_tables nfnetlink algif_hash algif_skcipher af_alg bnep sch_fq_codel vc4 snd_soc_hdmi_codec drm_display_helper btsdio cec spidev ov5647 hci_uart drm_dma_helper btqca drm_kms_helper brcmfmac btrtl snd_soc_core brcmutil btbcm rp1_cfe pisp_be aes_ce_blk btintel aes_ce_cipher rpivid_hevc(C) snd_compress snd_pcm_dmaengine bluetooth snd_pcm cfg80211 ghash_ce snd_timer snd v4l2_mem2mem fb_sys_fops sha2_ce ecdh_generic syscopyarea videobuf2_dma_contig sysfillrect ecc sysimgblt videobuf2_memops libaes videobuf2_v4l2 rfkill videobuf2_common sha256_arm64 sha1_ce i2c_designware_platform gpio_keys spi_bcm2835 raspberrypi_hwmon i2c_designware_core raspberrypi_gpiomem nvmem_rmem pwm_fan rp1_adc uio_pdrv_genirq uio drm drm_panel_orientation_quirks backlight fuse
[   67.600273] CPU: 0 PID: 3174 Comm: ml1:Camera1 Tainted: G         C         6.1.73-haos-raspi #1
[   67.600276] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)
[   67.600277] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   67.600280] pc : vb2_start_streaming+0xec/0x160 [videobuf2_common]
[   67.600288] lr : vb2_start_streaming+0x74/0x160 [videobuf2_common]
[   67.600296] sp : ffffffc00a343b60
[   67.600297] x29: ffffffc00a343b60 x28: ffffffcfe03b4bb8 x27: 0000000000000000
[   67.600300] x26: 0000000000000000 x25: ffffff8107fa8820 x24: ffffff810d086200
[   67.600303] x23: ffffff815170cc00 x22: 0000000040045612 x21: ffffff8107fa8790
[   67.600306] x20: ffffff8107fa85b8 x19: 00000000ffffffea x18: ffffffc00a343500
[   67.600309] x17: 0000000000000000 x16: ffffffd00cd6c69c x15: ffffffc08a3436b7
[   67.600311] x14: 0000000000000000 x13: 2e64656c62616e65 x12: 20746f6e20736920
[   67.600314] x11: 6b6e696c2065646f x10: 6e203068635f3269 x9 : ffffffd00c1ea1e8
[   67.600317] x8 : 00000000ffffefff x7 : 00000000fffff000 x6 : 0000000000000000
[   67.600320] x5 : ffffff81fef18a10 x4 : ffffff81fef18a10 x3 : 0000000000000000
[   67.600322] x2 : 0000000000000000 x1 : ffffffcfdfe5e000 x0 : 0000000000000004
[   67.600326] Call trace:
[   67.600327]  vb2_start_streaming+0xec/0x160 [videobuf2_common]
[   67.600335]  vb2_core_streamon+0x90/0x198 [videobuf2_common]
[   67.600343]  vb2_ioctl_streamon+0x54/0x98 [videobuf2_v4l2]
[   67.600352]  v4l_streamon+0x28/0x40
[   67.600358]  __video_do_ioctl+0x178/0x3fc
[   67.600362]  video_usercopy+0x21c/0x790
[   67.600365]  video_ioctl2+0x20/0x40
[   67.600368]  v4l2_ioctl+0x48/0x70
[   67.600370]  __arm64_sys_ioctl+0xb0/0x100
[   67.600374]  invoke_syscall+0x50/0x120
[   67.600378]  el0_svc_common.constprop.0+0xd4/0x100
[   67.600381]  do_el0_svc+0x34/0xd0
[   67.600383]  el0_svc+0x2c/0x84
[   67.600387]  el0t_64_sync_handler+0xf4/0x120
[   67.600390]  el0t_64_sync+0x18c/0x190
[   67.600392] ---[ end trace 0000000000000000 ]---
[   67.604510] rp1-cfe 1f00110000.csi: csi2_ch0 node link is not enabled.
[   67.604701] ------------[ cut here ]------------

The message repeats several times. I think this may be the reason why HA OS is not detecting a locally connected Pi camera while it works fine in the latest Raspbian on the same board.

What operating system image do you use?

rpi5-64 (Raspberry Pi 5 64-bit OS)

What version of Home Assistant Operating System is installed?

12.2

Did you upgrade the Operating System.

Yes

Steps to reproduce the issue

Boot the system, check the logs.

Anything in the Supervisor logs that might be useful for us?

not relevant

Anything in the Host logs that might be useful for us?

not relevant

System information

System Information

version	core-2024.4.3
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
user	root
virtualenv	false
python_version	3.12.2
os_name	Linux
os_version	6.1.73-haos-raspi
arch	aarch64
timezone	Europe/Prague
config_dir	/config

Home Assistant Cloud

logged_in	true
subscription_expiration	13. februára 2025 o 01:00
relayer_connected	true
relayer_region	eu-central-1
remote_enabled	true
remote_connected	true
alexa_enabled	false
google_enabled	true
remote_server	eu-central-1-17.ui.nabu.casa
certificate_status	ready
instance_id	fd9acab5e43e4efd85ff0db93524adfe
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 12.2
update_channel	stable
supervisor_version	supervisor-2024.04.0
agent_version	1.6.0
docker_version	25.0.5
disk_total	28.7 GB
disk_used	8.1 GB
healthy	true
supported	true
board	rpi5-64
supervisor_api	ok
version_api	ok
installed_addons	Advanced SSH & Web Terminal (17.2.0), motionEye (0.20.0)

Dashboards

dashboards	6
resources	0
views	10
mode	storage

Recorder

oldest_recorder_run	4. apríla 2024 o 15:59
current_recorder_run	13. apríla 2024 o 22:15
estimated_db_size	127.01 MiB
database_engine	sqlite
database_version	3.44.2

Additional information

No response

[sairon]

What kernel version have you tested with on Raspberry Pi OS? It's a shot in the dark but you can try the latest dev build to see if it's resolved - it is using Linux 6.6.20, which should be the same the current Pi OS is using.

Also, how do you use the camera? I think it won't work out of the box without any changes in config.txt and such, so adding more details about the setup would be helpful.

[jose1711]

Thank you for your response.

What kernel version

HA OS: Linux a0d7b954-ssh 6.1.73-haos-raspi #1 SMP PREEMPT Thu Apr 11 10:33:23 UTC 2024 aarch64 Linux
Raspbian: Linux raspberrypi 6.6.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64 GNU/Linux

I'll try to extract and replace required files in /boot partition from the dev build and report back if there is any improvement.

how do you use the camera?

As per https://gist.github.com/enegaard/a57af286205914bd912270c89650fb1b I added the following lines to config.txt:

[all]
start_x=1
gpu_mem=128

In Raspbian cam -l returns the following output:

[0:00:37.489576290] [1931]  INFO Camera camera_manager.cpp:284 libcamera v0.2.0+46-075b54d5
[0:00:37.501517975] [1935]  INFO RPI pisp.cpp:662 libpisp version v1.0.4 6e3a53d137f4 14-02-2024 (14:00:12)
[0:00:37.516460475] [1935]  INFO RPI pisp.cpp:1121 Registered camera /base/axi/pcie@120000/rp1/i2c@88000/ov5647@36 to CFE device /dev/media0 and ISP device /dev/media1 using PiSP variant BCM2712_C0
Available cameras:
1: 'ov5647' (/base/axi/pcie@120000/rp1/i2c@88000/ov5647@36)

I cannot reproduce the same in HA OS:

$ apk add libcamera-tools; cam -l
..
[0:08:16.035800835] [667]  INFO Camera camera_manager.cpp:284 libcamera v0.1.0
Available cameras:
$

[jose1711]

Replacing the files in the startup partition resulted in a boot loop so I went with a fresh install on another SD card. The tracedump is gone, it even seems that picamera is recognized:

$ dmesg
..
[    2.164699] rp1-cfe 1f00110000.csi: Using sensor ov5647 6-0036 for capture
[    2.165212] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-csi2_ch0] node id 0 successfully as /dev/video0
[    2.165708] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-embedded] node id 1 successfully as /dev/video1
[    2.166262] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-csi2_ch2] node id 2 successfully as /dev/video2
[    2.166896] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-csi2_ch3] node id 3 successfully as /dev/video3
[    2.170809] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-fe_image0] node id 4 successfully as /dev/video4
[    2.171422] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-fe_image1] node id 5 successfully as /dev/video5
[    2.172957] rp1-cfe 1f00110000.csi: Registered [rp1-cfe-fe_stats] node id 6 successfully as /dev/video6

But unfortunately neither cam nor motioneye are able to use it. Not sure if this an HA OS limitation or something can be done about the camera support.