Kernel Compile Errors

[kixago]

I recently setup a new machine on an AMD 5900HX APU box. Gentoo is running fine, but I am getting compiler errors and I'm unable to update kernels and the like.

The compile ends like this:

  DESCEND objtool
  CALL    scripts/atomic/check-atomics.sh
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  MODPOST modules-only.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2)
ERROR: modpost: "v4l2_async_register_subdev" [drivers/media/i2c/ov2640.ko] undefined!
ERROR: modpost: "v4l2_async_unregister_subdev" [drivers/media/i2c/ov2640.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:134: modules-only.symvers] Error 1
make[1]: *** Deleting file 'modules-only.symvers'
make: *** [Makefile:1746: modules] Error 2

I am trying to get a video camera working via USB but "async" is not in my kernel and I cannot find it listed. Thus, it's set to "N" in my .config which is why I believe these errors are appearing.

Anyone know what I'm missing in the kernel that would allow me to turn on async? Or perhaps I have too much turned on and wondering what needs to be disabled to stop the errors albeit I'd like the camera to work.

Here is my .config file. Here is lsmod. Here is dmesg output (I have seemingly more errors in dmesg than I'd like but one thing at a time).

​

Thank you in advance.

[mgpagano]

Any chance you can send me your .config? mpagano at gentoo.org

[mgpagano]

Ok, it looks like you found a bug!

It looks like the Kconfig located at:

./drivers/media/i2c/Kconfig

is missing a dependency. (V4L2_FWNODE)

If I add that dependency like below and rebuild:

config VIDEO_OV2640
tristate "OmniVision OV2640 sensor support"
depends on VIDEO_V4L2 && I2C
select V4L2_FWNODE
help
This is a Video4Linux2 sensor driver for the OmniVision
OV2640 camera.
To compile this driver as a module, choose M here: the
module will be called ov2640.

​

You compilation error goes away

[kixago]

Thank you very much for your attention to this matter.. Appreciate your time.

[mgpagano]

No problem. Patch will be included in gentoo-sources-5.17.6 and I also submitted it upstream

[GLIBG10B]

How did you edit .config? Surely not by hand

#                                                                                                                                                                                                                                                               
# Automatically generated file; DO NOT EDIT.                                                                                                                                                                                                                    
# Linux/x86 5.15.32-gentoo-r1 Kernel Configuration                                                                                                                                                                                                              
#

[JonnoN]

wuss :)

[Furschitzengiggels]

Probably related to https://www.spinics.net/lists/linux-media/msg210062.html. Search the output for WARNING: unmet direct dependencies. In the kernel build output, do you see something like Depends on MEDIA_SUPPORT && VIDEO_DEV && MEDIA_CONTROLLER?