path: root/sound/pci
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authorHui Wang <hui.wang@canonical.com>2019-12-18 21:26:50 +0800
committerTakashi Iwai <tiwai@suse.de>2019-12-18 20:04:37 +0100
commit92adc96f8eecd9522a907c197cc3d62e405539fe (patch)
treef5521e07eee4b8dfe8a1c5d8a2aa8c19ee169ce0 /sound/pci
parentMerge tag 'asoc-fix-v5.5-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus (diff)
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>
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