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authorDaniel Mack <zonque@gmail.com>2013-04-17 00:01:37 +0800
committerTakashi Iwai <tiwai@suse.de>2013-04-18 10:03:23 +0200
commit8a2a74d2b7667b2719858caf9eb2b5a92460195d (patch)
treea6d257af3b353205c2b2add2c7740713da9a0c9a /sound/usb/pcm.c
parentef7a4f979bd8201324b2bcd30277c14aba889f50 (diff)
downloadop-kernel-dev-8a2a74d2b7667b2719858caf9eb2b5a92460195d.zip
op-kernel-dev-8a2a74d2b7667b2719858caf9eb2b5a92460195d.tar.gz
ALSA: snd-usb: use ep->stride from urb callbacks
For normal PCM transfer, this change has no effect, as the endpoint's stride is always frame_bits/8. For DSD DOP streams, however, which is added later, the hardware stride differs from the software stride, and the endpoint has the correct information in these cases. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 9916c85..099c0fe 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -1236,8 +1236,8 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
counts = snd_usb_endpoint_next_packet_size(ep);
/* set up descriptor */
- urb->iso_frame_desc[i].offset = frames * stride;
- urb->iso_frame_desc[i].length = counts * stride;
+ urb->iso_frame_desc[i].offset = frames * ep->stride;
+ urb->iso_frame_desc[i].length = counts * ep->stride;
frames += counts;
urb->number_of_packets++;
subs->transfer_done += counts;
@@ -1251,14 +1251,14 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
frames -= subs->transfer_done;
counts -= subs->transfer_done;
urb->iso_frame_desc[i].length =
- counts * stride;
+ counts * ep->stride;
subs->transfer_done = 0;
}
i++;
if (i < ctx->packets) {
/* add a transfer delimiter */
urb->iso_frame_desc[i].offset =
- frames * stride;
+ frames * ep->stride;
urb->iso_frame_desc[i].length = 0;
urb->number_of_packets++;
}
@@ -1269,7 +1269,7 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
!snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
break;
}
- bytes = frames * stride;
+ bytes = frames * ep->stride;
if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
/* err, the transferred area goes over buffer boundary. */
unsigned int bytes1 =
@@ -1310,8 +1310,8 @@ static void retire_playback_urb(struct snd_usb_substream *subs,
{
unsigned long flags;
struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
- int stride = runtime->frame_bits >> 3;
- int processed = urb->transfer_buffer_length / stride;
+ struct snd_usb_endpoint *ep = subs->data_endpoint;
+ int processed = urb->transfer_buffer_length / ep->stride;
int est_delay;
/* ignore the delay accounting when procssed=0 is given, i.e.
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