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Jeff Johnson
c7448ca0a5
PLAYBACK used dev_timestamp from the T2 coprocessor clock domain, which drifts from the host's ktime_get_boottime() after module reload. This produced wild position values in aaudio_pcm_pointer, triggering XRUN and a scheduling-while-atomic panic when snd_pcm_do_stop ran from DMA IRQ context. Switch PLAYBACK to os_timestamp (host boottime at message receipt), matching what CAPTURE already does. The mailbox transit delay (~100 microseconds at most) is negligible in a 347 ms ALSA buffer and eliminates the crash entirely.