case-lib: is_ipc4: use new debugfs file instead of kernel parameter

[plbossart]

First step to remove use of kernel parameters

Link: thesofproject/linux#4902
Link: #1166

[plbossart]

shellcheck error is a pre-existing issue that was obviously overlooked

In case-lib/lib.sh line 954:
TGLU_RVP_NOCODEC_IPC4ZPH | ADLP_RVP_NOCODEC_IPC4ZPH | MTLP_RVP_NOCODEC |ADLP_RVP_NOCODEC-ipc4 | TGLU_RVP_NOCODEC-ipc4 | MTLP_RVP_NOCODEC | MTLP_RVP_NOCODEC-multicore-2cores | MTLP_RVP_NOCODEC-multicore-3cores | LNLM_RVP_NOCODEC)
^--------------^ SC22[21](https://github.com/thesofproject/sof-test/actions/runs/8544615585/job/23411051491?pr=1167#step:3:22) (warning): This pattern always overrides a later one on line 954.
^--------------^ SC[22](https://github.com/thesofproject/sof-test/actions/runs/8544615585/job/23411051491?pr=1167#step:3:23)22 (warning): This pattern never matches because of a previous pattern on line 954.

MTLP_RVP_NOCODEC is listed twice in the same OR.

[marc-hb]

cc:

• thesofproject/linux#3867

 # If /sys/module/snd_sof_pci/parameters/ipc_type does not exist
# the DUT is running IPC3 mode

This shortcut and bad assumption should print a big fat dlogw() TODAY and be "upgraded" to a die() failure in the future. Please add the dlogw() now; I think that would have saved you time and it will save others'

[marc-hb]

MTLP_RVP_NOCODEC is listed twice in the same OR.

(Unrelated) fix submitted in #1168. Now merged.

[marc-hb]

Looks good except for some nits and one... missing fi?

stale request for changes

[marc-hb]

Lots of models missing but everything green for the ones present

[marc-hb]

This does not work actually: it's at least missing a few sudo. I think you didn't notice because you run sof-test as root but that's not how it's usually tested.

https://sof-ci.01.org/softestpr/PR1167/build265/devicetest/index.html?model=MTLP_RVP_NOCODEC&testcase=verify-kernel-module-load-probe

2024-04-05 14:58:59 UTC [REMOTE_INFO] Starting func_exit_handler(0)
cat: /sys/kernel/debug/sof/fw_profile/ipc_type: Permission denied
2024-04-05 14:58:59 UTC [REMOTE_WARNING] using pre kernel 6.9 backwards-compatible fallback with ipc_type kernel parameter
cat: /sys/kernel/debug/sof/fw_profile/ipc_type: Permission denied
2024-04-05 14:58:59 UTC [REMOTE_WARNING] using pre kernel 6.9 backwards-compatible fallback with ipc_type kernel parameter
2024-04-05 14:58:59 UTC [REMOTE_INFO] pkill -TERM -f mtrace-reader.py
2024-04-05 14:58:59 UTC [REMOTE_INFO] ktime=123 sof-test PID=3129: ending
2024-04-05 14:58:59 UTC [REMOTE_INFO] Test Result: PASS!

[marc-hb]

Filed new issue:

• /sys/debug/ fw_profile/ipc_type: permission denied #1171