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| author | Tzung-Bi Shih <tzungbi@google.com> | 2020-07-24 10:07:31 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-07-24 19:27:53 +0300 |
| commit | 3aecfc72d7ad73330e7a6ebd0005738a8fd417ab (patch) | |
| tree | 77fa08689dd3f928b796102fbe3ecd8a9a1a5a43 /sound/soc/intel/boards/bdw-rt5677.c | |
| parent | aa2d1ee76660edd4072c9cf8f83ffde4b58a1dd0 (diff) | |
| download | linux-3aecfc72d7ad73330e7a6ebd0005738a8fd417ab.tar.xz | |
ASoC: dapm: don't call pm_runtime_* on card device
runtime_usage of sound card has been observed to grow without bound.
For example:
$ cat /sys/devices/platform/sound/power/runtime_usage
46
$ sox -n -t s16 -r 48000 -c 2 - synth 1 sine 440 vol 0.1 | \
aplay -q -D hw:0,0 -f S16_LE -r 48000 -c 2
$ cat /sys/devices/platform/sound/power/runtime_usage
52
Commit 4e872a46823c ("ASoC: dapm: Don't force card bias level to be
updated") stops to force update bias_level on card. If card doesn't
provide set_bias_level callback, the snd_soc_dapm_set_bias_level()
is equivalent to NOP for card device.
As a result, dapm_pre_sequence_async() doesn't change the bias_level of
card device correctly. Thus, pm_runtime_get_sync() would be called in
dapm_pre_sequence_async() without symmetric pm_runtime_put() in
dapm_post_sequence_async().
Don't call pm_runtime_* on card device.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200724070731.451377-1-tzungbi@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel/boards/bdw-rt5677.c')
0 files changed, 0 insertions, 0 deletions