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| author | Daniel Girnus <dgirnus@de.adit-jv.com> | 2016-12-06 14:46:15 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-12-06 13:55:15 +0100 |
| commit | 1e2e3fe480064ca33186e5a923beaa160efed35d (patch) | |
| tree | ab3155a9ffd5391a54b5072a798615e71d382b54 /sound/usb/midi.h | |
| parent | 4763601a56f155ddf94ef35fc2c41504a2de15f5 (diff) | |
| download | linux-1e2e3fe480064ca33186e5a923beaa160efed35d.tar.bz2 | |
ALSA: usb-audio: avoid setting of sample rate multiple times on bus
Some of userland applications call 'snd_pcm_hw_params()' and
'snd_pcm_hw_prepare()' sequentially, which means 'snd_pcm_hw_prepare()'
is called twice and the second 'snd_pcm_hw_prepare()' is called in
'SNDRV_PCM_STATE_PREPARED' state.
Some devices are not able to manage this and they will stop playback
if the sample rate will be configured several times over USB protocol.
V2: updated Changelog
Signed-off-by: Daniel Girnus <dgirnus@de.adit-jv.com>
Signed-off-by: Jens Lorenz <jlorenz@de.adit-jv.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/midi.h')
0 files changed, 0 insertions, 0 deletions