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author | Hui Wang <hui.wang@canonical.com> | 2019-12-18 21:26:50 +0800 |
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committer | Takashi Iwai <tiwai@suse.de> | 2019-12-18 20:04:37 +0100 |
commit | 92adc96f8eecd9522a907c197cc3d62e405539fe (patch) | |
tree | f5521e07eee4b8dfe8a1c5d8a2aa8c19ee169ce0 /drivers/i2c/busses | |
parent | 7c497d799267134786afdf719d9230b7d6f77d84 (diff) | |
download | talos-op-linux-92adc96f8eecd9522a907c197cc3d62e405539fe.tar.gz talos-op-linux-92adc96f8eecd9522a907c197cc3d62e405539fe.zip |
ALSA: usb-audio: set the interface format after resume on Dell WD19
Recently we found the headset-mic on the Dell Dock WD19 doesn't work
anymore after s3 (s2i or deep), this problem could be workarounded by
closing (pcm_close) the app and then reopening (pcm_open) the app, so
this bug is not easy to be detected by users.
When problem happens, retire_capture_urb() could still be called
periodically, but the size of captured data is always 0, it could be
a firmware bug on the dock. Anyway I found after resuming, the
snd_usb_pcm_prepare() will be called, and if we forcibly run
set_format() to set the interface and its endpoint, the capture
size will be normal again. This problem and workaound also apply to
playback.
To fix it in the kernel, add a quirk to let set_format() run
forcibly once after resume.
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191218132650.6303-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/i2c/busses')
0 files changed, 0 insertions, 0 deletions