V4L2 error after updating kernel to 5.15 from 5.10

[Baal]

Armbianmonitor:

http://ix.io/3UHS

Hi all

 

After update kernel from 5.10.60 to 5.15 or 5.16 on my Orange PI PC+ MJPEG-Streamer throws:

  Quote

libv4l2: error turning on stream: Cannot allocate memory

motion throws:

  Quote

[1:ml1] [ERR] [VID] v4l2_set_mmap: Error starting stream. VIDIOC_STREAMON: Cannot allocate memory

 

I tried to decrease resolution - even 320x240 not helps.

Rolling back to 5.10.60 helps, but it's not very sustainable solution.

 

Are there any known solution for 5.15-5.16?

 

Today checked kernel 5.15.43-sunxi and 5.17.11-sunxi - same issue

 

baal@3dprinter:~$ mjpg_streamer -i "input_uvc.so -f 5 -d $(ls -1 /dev/video[1-9] | head -1) -r SVGA -n" -o output_http.so
MJPG Streamer Version: git rev: 310b29f4a94c46652b20c4b7b6e5cf24e532af39
 i: Using V4L2 device.: /dev/video1
 i: Desired Resolution: 800 x 600
 i: Frames Per Second.: 5
 i: Format............: JPEG
 i: TV-Norm...........: DEFAULT
 i: FPS coerced ......: from 5 to 30
 o: www-folder-path......: disabled
 o: HTTP TCP port........: 8080
 o: HTTP Listen Address..: (null)
 o: username:password....: disabled
 o: commands.............: enabled
libv4l2: error turning on stream: Cannot allocate memory
Unable to start capture: Cannot allocate memory
 i: Can't enable video in first time
 i: cleaning up resources allocated by input thread
^Csetting signal to stop
force cancellation of threads and cleanup resources
 o: cleaning up resources allocated by server thread #00

 

[usual user]

Quote

[    0.000000] cma: Reserved 128 MiB at 0x75c00000

128MiB cma is probably not sufficient according to here:

Quote

Decoding H.264/H.265 videos can require a large amount of CMA memory,  so it is recommended to set a large CMA pool, e.g. using the cma kernel  command line parameter. For instance, 256 MiB should be enough to  decode 1080p H.264 videos: cma=256M.

 

[Baal]

THANK YOU!!

 

I added

extraargs=cma=256M

to /boot/armbianEnv.txt and it works now.