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When capture is already running and playback starts, the echo cancellation setup for the new playback stream tries to acquire a lock that the capture thread is already holding while waiting for DSP data. This causes the playback startup to block for 13-27 seconds resulting in muted audio at the beginning of playback. Fixed by using the lock-free variant of the echo reference setup call, which is safe here since the resource manager lock is already held preventing any concurrent access. This is also consistent with how the same operation is handled for the transmit stream path. Tested on: LEMANS EVK (IQ-9075) Signed-off-by: Tejas Vijay Kanfade <tkanfade@qti.qualcomm.com>
Signed-off-by: tkanfade <tkanfade@qti.qualcomm.com>
sauravk-git
approved these changes
Aug 11, 2026
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When capture is already running and playback starts, the echo
cancellation setup for the new playback stream tries to acquire
a lock that the capture thread is already holding while waiting
for DSP data. This causes the playback startup to block for
13-27 seconds resulting in muted audio at the beginning of
playback.
Fixed by using the lock-free variant of the echo reference
setup call, which is safe here since the resource manager
lock is already held preventing any concurrent access.
This is also consistent with how the same operation is
handled for the transmit stream path.
Tested on: LEMANS EVK (IQ-9075)