diff options
| -rw-r--r-- | sound/usb/endpoint.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 0cc64bd4d0a4..7b1cb365ffab 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -617,6 +617,8 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep, unsigned int max_packs_per_period, urbs_per_period, urb_packs; unsigned int max_urbs, i; int frame_bits = snd_pcm_format_physical_width(pcm_format) * channels; + int tx_length_quirk = (ep->chip->tx_length_quirk && + usb_pipeout(ep->pipe)); if (pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && fmt->dsd_dop) { /* @@ -650,11 +652,17 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep, */ maxsize = (((ep->freqmax << ep->datainterval) + 0xffff) >> 16) * (frame_bits >> 3); + if (tx_length_quirk) + maxsize += sizeof(__le32); /* Space for length descriptor */ /* but wMaxPacketSize might reduce this */ if (ep->maxpacksize && ep->maxpacksize < maxsize) { /* whatever fits into a max. size packet */ - maxsize = ep->maxpacksize; - ep->freqmax = (maxsize / (frame_bits >> 3)) + unsigned int data_maxsize = maxsize = ep->maxpacksize; + + if (tx_length_quirk) + /* Need to remove the length descriptor to calc freq */ + data_maxsize -= sizeof(__le32); + ep->freqmax = (data_maxsize / (frame_bits >> 3)) << (16 - ep->datainterval); } |