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From 17c5f7dd425becd30c4a2dafaecb054641a1fdc9 Mon Sep 17 00:00:00 2001
From: Alexander Tsoy <alexander@tsoy.me>
Date: Mon, 29 Jun 2020 05:59:33 +0300
Subject: ALSA: usb-audio: Fix packet size calculation
Commit f0bd62b64016 ("ALSA: usb-audio: Improve frames size computation")
introduced a regression for devices which have playback endpoints with
bInterval > 1. Fix this by taking ep->datainterval into account.
Note that frame and fps are actually mean packet and packets per second
in the code introduces by the mentioned commit. This will be fixed in a
follow-up patch.
Fixes: f0bd62b64016 ("ALSA: usb-audio: Improve frames size computation")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208353
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
---
sound/usb/endpoint.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 9bea7d3f99f8..11f23778f0a5 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -1093,6 +1093,7 @@ int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
ep->freqn = get_usb_high_speed_rate(rate);
ep->fps = 8000;
}
+ ep->fps >>= ep->datainterval;
ep->sample_rem = rate % ep->fps;
ep->framesize[0] = rate / ep->fps;
--
cgit v1.2.3-1-gf6bb5
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