Separate setting implicit feedback quirks from setting a sync endpoint (which may also be explicit feedback or async).
Signed-off-by: Eldad Zack eldad@fogrefinery.com
--- v2: removed check to return early if subs->sync_endpoint is already set, as this is a functional change (although it is initialized to NULL and set to NULL on disconnect). --- sound/usb/pcm.c | 60 ++++++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 45 insertions(+), 15 deletions(-)
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index e24ce7d..0016f28 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -327,24 +327,16 @@ static int search_roland_implicit_fb(struct usb_device *dev, int ifnum, return 0; }
- -static int set_sync_endpoint(struct snd_usb_substream *subs, - struct audioformat *fmt, - struct usb_device *dev, - struct usb_host_interface *alts, - struct usb_interface_descriptor *altsd) +static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs, + struct usb_device *dev, + struct usb_interface_descriptor *altsd, + unsigned int attr) { + struct usb_host_interface *alts; struct usb_interface *iface; int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; - unsigned int ep, attr; int implicit_fb = 0; - - /* we need a sync pipe in async OUT or adaptive IN mode */ - /* check the number of EP, since some devices have broken - * descriptors which fool us. if it has only one EP, - * assume it as adaptive-out or sync-in. - */ - attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; + unsigned int ep;
switch (subs->stream->chip->usb_id) { case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ @@ -388,6 +380,45 @@ static int set_sync_endpoint(struct snd_usb_substream *subs, goto add_sync_ep; }
+ /* No quirk */ + return 0; + +add_sync_ep: + subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, + alts, ep, !subs->direction, + implicit_fb ? + SND_USB_ENDPOINT_TYPE_DATA : + SND_USB_ENDPOINT_TYPE_SYNC); + if (!subs->sync_endpoint) + return -EINVAL; + + subs->data_endpoint->sync_master = subs->sync_endpoint; + + return 0; +} + +static int set_sync_endpoint(struct snd_usb_substream *subs, + struct audioformat *fmt, + struct usb_device *dev, + struct usb_host_interface *alts, + struct usb_interface_descriptor *altsd) +{ + int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; + unsigned int ep, attr; + int implicit_fb = 0; + int err; + + /* we need a sync pipe in async OUT or adaptive IN mode */ + /* check the number of EP, since some devices have broken + * descriptors which fool us. if it has only one EP, + * assume it as adaptive-out or sync-in. + */ + attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; + + err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr); + if (err < 0) + return err; + if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && altsd->bNumEndpoints >= 2) { @@ -420,7 +451,6 @@ static int set_sync_endpoint(struct snd_usb_substream *subs, implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB;
-add_sync_ep: subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, alts, ep, !subs->direction, implicit_fb ?