[alsa-devel] [PATCH v2 10/10] ALSA: hda: replace .wallclock by .get_time_info

[Pierre-Louis Bossart]

>> +               audio_tstamp_report->accuracy_m = 42; /* 24 MHz WallClock
> == 42ns resolution */
>> +               audio_tstamp_report->accuracy_e = 0;
>> +
>
> Do you mean wall clock run at 48000 * 500 Hz ? 42.666ns

HDAudio wall clock (and bit clock) runs at 24MHz. So yes that's 48000 * 500.

> Those aureal sound cards also can provide time stamp using VORTEX_SMP_TIME
> mmio register which tick at 48000 * 256 Hz ?

then it should be fairly easy to implement the same feature...