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| author | Rene Herman <rene.herman@gmail.com> | 2007-09-10 23:19:55 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2007-10-16 16:49:24 +0200 |
| commit | 90cf9b853281a39555cce8a42fc0fabad75b42a8 (patch) | |
| tree | 45b1da8f46b35d5b7d3fd1e6fbf05518670ff920 /lib/iomap_copy.c | |
| parent | 51c80cb65ff9b7bdf172f9075138793c2bce6883 (diff) | |
[ALSA] ad1838/cs4231 - fix MCE timeout upon initial load
When the ad1848/cs2431 is first being initialized, auto-calibration may not
be set causing a timeout waiting for it in snd_ad1848/cs4231_mce_down().
This has no dire consequences other than an alarming printk, but since what
we need to wait for is for the calibration to _finish_, let's just check for
that instead.
The early chips need a slight delay (as commented -- 5 sample periods) to be
sure that _if_ calibration is going to happen, it has started when we check
While the CS4231A datasheet implies it'll happen immediately on downing MCE,
some testing is showing that there's a window there as well, so just do the
delay everywhere.
Thanks to Krysztof Helt for pinpointing this problem.
Signed-off-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'lib/iomap_copy.c')
0 files changed, 0 insertions, 0 deletions