Public bug reported:
[Impact]
On Dell Slate Max systems with SoundWire Device Class Audio (SDCA) hardware,
there is a race condition when setting up jack detection.
Plug headset first, sound can output and headset Mic is workable.
But after cold boot/reboot, audio device is keep but no sound output from
headset, headset Mic also no function. Hot plug headset can recovery.
[Fix]
Reorganize SDCA IRQ registration and lifecycle management to run at the correct
time and avoid races.
The fixes do this by adding a new component-level callback that runs
after all ALSA controls are created. This ensures the jack detection
IRQs are registered only when the controls are ready.
Upstream commits (first appeared in v7.2-rc6):
- 3e81e2fb2163 ASoC: Add a component fixup_controls callback
- b8f71f16134f ASoC: SDCA: Switch to fixup_controls callback for IRQ
registration
- bf1b7821f853 ASoC: SDCA: Move kcontrol search out of IRQ
- 050406cbd676 ASoC: SDCA: Populate IRQ data earlier
- 0880082c27b6 ASoC: SDCA: Remove devm from primary IRQ cleanup
- f18e97fa7f12 ASoC: SDCA: Add sdca_irq_cleanup_late()
- 4ecef577d1ce ASoC: SDCA: Rename sdca_irq_allocate() to include devm
[Test Plan]
Boot the system, plug headphones in and out, and check if audio switches
correctly.
1. Boot the system with headphones unplugged.
2. Plug headphones in and check the jack state:
$ evtest
(or check alsamixer/sound settings)
3. Unplug headphones and verify sound switches back.
4. Reload the SoundWire driver modules or trigger suspend/resume to force card
teardown and reprobe:
$ sudo rtcwake -m mem -s 15
Or reload the SoundWire modules:
$ sudo modprobe -r snd_sof_intel_sdw
$ sudo modprobe snd_sof_intel_sdw
Without these patches:
- On boot, headphones might show up as connected when they are not, or sound
might not switch correctly when plugged in.
- After suspend/resume or reloading modules, jack detection stops working, or
the system crashes/shows warnings due to stale pointers.
With these patches:
- Headphones and speaker paths are always set correctly on boot.
- Jack detection and audio routing work correctly after suspend/resume and
driver reloads.
[Where problems could occur]
Could break SDCA jack detection and SoundWire audio class drivers.
If the new fixup_controls callback has a bug, jack IRQs will not be registered.
Jack detection could stop working completely.
If the cached kcontrol search gets a wrong pointer, the kernel will crash with
a NULL pointer dereference when the IRQ handler runs.
[Other Info]
All seven patches are upstream in v7.2-rc6.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Noble)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.17 (Ubuntu Noble)
Importance: Undecided
Status: In Progress
** Affects: linux (Ubuntu Resolute)
Importance: Undecided
Status: In Progress
** Affects: linux-oem-6.17 (Ubuntu Resolute)
Importance: Undecided
Status: Invalid
** Tags: cpl jira-cpl-325 oem-priority
** Also affects: linux-oem-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.17 (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Resolute)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.17 (Ubuntu Resolute)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Noble)
Status: New => Invalid
** Changed in: linux (Ubuntu Resolute)
Status: New => In Progress
** Changed in: linux-oem-6.17 (Ubuntu Noble)
Status: New => In Progress
** Changed in: linux-oem-6.17 (Ubuntu Resolute)
Status: New => Invalid
** Tags added: cpl jira-cpl-325 oem-priority
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https://bugs.launchpad.net/bugs/2163215
Title:
Fix SDCA jack detection race and reprobe issues on Dell Slate Max
platform with CirrusLogic audio solution
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