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| author | Kai Vehmanen <[email protected]> | 2020-04-28 12:38:36 +0000 |
|---|---|---|
| committer | Takashi Iwai <[email protected]> | 2020-04-28 14:04:45 +0000 |
| commit | ca76282b6faffc83601c25bd2a95f635c03503ef (patch) | |
| tree | 80770ea91844f55d25b6fd4e29bd0375ae6d4703 /tools/perf/scripts/python | |
| parent | ALSA: hda/realtek - Two front mics on a Lenovo ThinkCenter (diff) | |
| download | kernel-ca76282b6faffc83601c25bd2a95f635c03503ef.tar.gz kernel-ca76282b6faffc83601c25bd2a95f635c03503ef.zip | |
ALSA: hda/hdmi: fix race in monitor detection during probe
A race exists between build_pcms() and build_controls() phases of codec
setup. Build_pcms() sets up notifier for jack events. If a monitor event
is received before build_controls() is run, the initial jack state is
lost and never reported via mixer controls.
The problem can be hit at least with SOF as the controller driver. SOF
calls snd_hda_codec_build_controls() in its workqueue-based probe and
this can be delayed enough to hit the race condition.
Fix the issue by invalidating the per-pin ELD information when
build_controls() is called. The existing call to hdmi_present_sense()
will update the ELD contents. This ensures initial monitor state is
correctly reflected via mixer controls.
BugLink: https://github.com/thesofproject/linux/issues/1687
Signed-off-by: Kai Vehmanen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions