All of lore.kernel.org
 help / color / mirror / Atom feed
From: Sangbeom Kim <sbkim73@samsung.com>
To: 'Mark Brown' <broonie@opensource.wolfsonmicro.com>
Cc: alsa-devel@alsa-project.org, sbkim01@gmail.com,
	sangsu4u.park@samsung.com, 'Liam Girdwood' <lrg@ti.com>
Subject: WM8994 playback delay
Date: Thu, 29 Mar 2012 08:02:29 +0900	[thread overview]
Message-ID: <031201cd0d36$d9b78310$8d268930$@com> (raw)
In-Reply-To: <1332964426-8480-2-git-send-email-broonie@opensource.wolfsonmicro.com>

Hi, Mark,

Currently, We are developing SMDK with Exynos5250 and  WM8994 on 3.3-rc6.
We try to enable CONFIG_PM_RUNTIME and on/off control of power domain.
But It has playback delay in the first playback.(3~4sec and 6/10times)

In that time, Log maessage is 
'wm8994-codec wm8994-codec: Timed out waiting for DC Servo 300'
wait_for_dc_servo() function generate above message on sound/soc/codecs/wm_hubs.c

After removing wait_for_dc_servo for testing, playback delay is disappeared.
So, Could you please explain the  purporse of wait_for_dc_servo()?
If wait_for_dc_servo() is removed, What kind of problem can be happened?

Thanks,
Sangbeom.

  reply	other threads:[~2012-03-28 23:02 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-28 19:53 [PATCH 1/2] ASoC: sgtl5000: Convert mic bias to a supply widget Mark Brown
2012-03-28 19:53 ` [PATCH 2/2] ASoC: dapm: Remove SND_SOC_DAPM_MICBIAS_E() Mark Brown
2012-03-28 23:02   ` Sangbeom Kim [this message]
2012-03-29 10:50     ` WM8994 playback delay Mark Brown
2012-03-29  3:40 ` [PATCH 1/2] ASoC: sgtl5000: Convert mic bias to a supply widget Dong Aisheng
2012-03-29  5:24 ` Shawn Guo
2012-03-29 10:56   ` Mark Brown
2012-03-29 14:11     ` Shawn Guo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='031201cd0d36$d9b78310$8d268930$@com' \
    --to=sbkim73@samsung.com \
    --cc=alsa-devel@alsa-project.org \
    --cc=broonie@opensource.wolfsonmicro.com \
    --cc=lrg@ti.com \
    --cc=sangsu4u.park@samsung.com \
    --cc=sbkim01@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.