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When a single clock source is shared among several endpoints, we have to keep the same rate on all active endpoints as long as the clock is being used. For dealing with such a case, this patch adds one more check in the hw params constraint for the rate to take the shared clocks into account. The current rate is evaluated from the endpoint list that applies the same clock source. BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1190418 Link: https://lore.kernel.org/r/20210929080844.11583-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __USBAUDIO_ENDPOINT_H
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#define __USBAUDIO_ENDPOINT_H
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#define SND_USB_ENDPOINT_TYPE_DATA 0
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#define SND_USB_ENDPOINT_TYPE_SYNC 1
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struct snd_usb_endpoint *snd_usb_get_endpoint(struct snd_usb_audio *chip,
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int ep_num);
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int snd_usb_add_endpoint(struct snd_usb_audio *chip, int ep_num, int type);
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struct snd_usb_endpoint *
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snd_usb_endpoint_open(struct snd_usb_audio *chip,
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const struct audioformat *fp,
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const struct snd_pcm_hw_params *params,
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bool is_sync_ep);
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void snd_usb_endpoint_close(struct snd_usb_audio *chip,
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struct snd_usb_endpoint *ep);
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int snd_usb_endpoint_configure(struct snd_usb_audio *chip,
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struct snd_usb_endpoint *ep);
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int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock);
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bool snd_usb_endpoint_compatible(struct snd_usb_audio *chip,
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struct snd_usb_endpoint *ep,
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const struct audioformat *fp,
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const struct snd_pcm_hw_params *params);
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void snd_usb_endpoint_set_sync(struct snd_usb_audio *chip,
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struct snd_usb_endpoint *data_ep,
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struct snd_usb_endpoint *sync_ep);
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void snd_usb_endpoint_set_callback(struct snd_usb_endpoint *ep,
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void (*prepare)(struct snd_usb_substream *subs,
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struct urb *urb),
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void (*retire)(struct snd_usb_substream *subs,
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struct urb *urb),
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struct snd_usb_substream *data_subs);
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int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
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void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep);
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void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
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void snd_usb_endpoint_suspend(struct snd_usb_endpoint *ep);
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int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
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void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
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void snd_usb_endpoint_free_all(struct snd_usb_audio *chip);
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int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
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int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep,
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struct snd_urb_ctx *ctx, int idx);
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#endif /* __USBAUDIO_ENDPOINT_H */
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