intel-ipu6-dkms FTBS with the latest linux 6.8 hwe kernel in jammy

[Andrea Righi]

[Impact]

/var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/i2c/hm11b1.c:907:18: error: implicit declaration of function ‘v4l2_subdev_get_try_format’; did you mean ‘v4l2_subdev_get_fmt’? [-Werror=implicit-function-declaration]
  907 | *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format;
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
      | v4l2_subdev_get_fmt
/var/lib/dkms/ipu6-drivers/0~git202211220708.278b7e3d-0ubuntu0.22.04.1/build/drivers/media/i2c/hm11b1.c:907:17: error: invalid type argument of unary ‘*’ (have ‘int’)
  907 | *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format;
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Test case]

 $ sudo apt install intel-ipu6-dkms

[Fix]

Backport from Noble the required changes to properly support the new 6.8 kernel ABI.

[Regression potential]

We may experience regressions in system that are using the ipu6 camera, especially with the new 6.8 kernel.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: intel-ipu6-dkms 0~git202211220708.278b7e3d-0ubuntu0.22.04.1
ProcVersionSignature: User Name 6.8.0-35.35.1~22.04.1-lowlatency 6.8.4
Uname: Linux 6.8.0-35-lowlatency x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CloudArchitecture: x86_64
CloudID: nocloud
CloudName: unknown
CloudPlatform: nocloud
CloudSubPlatform: config-disk (/dev/vdb)
Date: Thu Jun 27 09:28:42 2024
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: ipu6-drivers
UpgradeStatus: No upgrade log present (probably fresh install)

[Andrea Righi (arighi)]

Backporting the version from oracular allows to fix both the hwe 6.8 kernel and the GA 5.15 kernel.

Test build with 6.8:

intel-ipu6.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

intel-ipu6-isys.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

intel-ipu6-psys.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

hm11b1.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov01a1s.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov01a10.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov02c10.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov02e10.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov08a10.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov08x40.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov13858.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

ov8856.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

hm2170.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

hm2172.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

hi556.ko:
Running module version sanity check.
 - Original module
 - Installation
   - Installing to /lib/modules/6.8.0-35-lowlatency/updates/dkms/

Test build with GA 5.15:

intel-ipu6.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.15.0-115-generic/updates/dkms/

intel-ipu6-isys.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.15.0-115-generic/updates/dkms/

intel-ipu6-psys.ko:
Running module version sanity check.
 - Original module
   - No original module exists with...

[Timo Aaltonen (tjaalton)]

this does not need testing with the GA kernel, it was never useable for ipu6 (only oem-6.x was, and they're EOL with the 6.8 backport from noble)