3f60546293
Adding helper API to find usb substream context information using card number, pcm device number and direction. This usb substream is used to enable/disable by issuing SET_ALT command to device. Also add disconnect call back to perform any clean up required. Bug: 140989596 Change-Id: I252f5171bd94b5ab096eb1a2f053f29a8c049c3b Signed-off-by: Hemant Kumar <hemantk@codeaurora.org> Signed-off-by: Jack Pham <jackp@codeaurora.org>
21 lines
686 B
C
21 lines
686 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __USBAUDIO_PCM_H
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#define __USBAUDIO_PCM_H
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snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
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unsigned int rate);
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void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream);
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int snd_usb_pcm_suspend(struct snd_usb_stream *as);
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int snd_usb_pcm_resume(struct snd_usb_stream *as);
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int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
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struct usb_host_interface *alts,
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struct audioformat *fmt);
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void snd_usb_preallocate_buffer(struct snd_usb_substream *subs);
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int snd_usb_enable_audio_stream(struct snd_usb_substream *subs,
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int datainterval, bool enable);
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#endif /* __USBAUDIO_PCM_H */
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