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>
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 @@
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 @@
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 @@
!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 @@
{
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.