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authorTakashi Iwai <tiwai@suse.de>2021-09-29 11:08:36 +0300
committerTakashi Iwai <tiwai@suse.de>2021-09-30 14:55:18 +0300
commit4e7cf1fbb34ecb472c073980458cbe413afd4d64 (patch)
tree058c5de079f8c9a3e2e1619c6550740d4b59508c /sound/usb/endpoint.h
parentc4ca3871e21fa085096316f5f8d9975cf3dfde1d (diff)
downloadlinux-4e7cf1fbb34ecb472c073980458cbe413afd4d64.tar.xz
ALSA: usb-audio: Restrict rates for the shared clocks
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>
Diffstat (limited to 'sound/usb/endpoint.h')
-rw-r--r--sound/usb/endpoint.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index a668f675b52b..a1099ec37e1c 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -19,6 +19,7 @@ void snd_usb_endpoint_close(struct snd_usb_audio *chip,
struct snd_usb_endpoint *ep);
int snd_usb_endpoint_configure(struct snd_usb_audio *chip,
struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock);
bool snd_usb_endpoint_compatible(struct snd_usb_audio *chip,
struct snd_usb_endpoint *ep,