Commit 8a2a74d2 authored by Daniel Mack's avatar Daniel Mack Committed by Takashi Iwai

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: default avatarDaniel Mack <zonque@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent ef7a4f97
......@@ -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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