Date: Sun, 23 Nov 2014 16:27:31 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r274918 - head/sys/dev/sound/usb Message-ID: <201411231627.sANGRV9P051030@svn.freebsd.org>
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Author: hselasky Date: Sun Nov 23 16:27:31 2014 New Revision: 274918 URL: https://svnweb.freebsd.org/changeset/base/274918 Log: Don't use the synchronization endpoint unless referenced by the isochronous endpoint descriptor used for the data transfers, hence the synchronization feature might not be supposed to be supported [yet]. This makes seamless playback synced with the USB HOST clock work with the DN32-USB module for Midas audio systems and possibly other similar products from Klark Teknik. MFC after: 1 week Modified: head/sys/dev/sound/usb/uaudio.c Modified: head/sys/dev/sound/usb/uaudio.c ============================================================================== --- head/sys/dev/sound/usb/uaudio.c Sun Nov 23 15:38:06 2014 (r274917) +++ head/sys/dev/sound/usb/uaudio.c Sun Nov 23 16:27:31 2014 (r274918) @@ -189,6 +189,7 @@ struct uaudio_chan_alt { uint8_t iface_index; uint8_t iface_alt_index; uint8_t channels; + uint8_t enable_sync; }; struct uaudio_chan { @@ -1798,6 +1799,14 @@ uaudio_chan_fill_info_sub(struct uaudio_ chan_alt->iface_index = curidx; chan_alt->iface_alt_index = alt_index; + if (UEP_HAS_SYNCADDR(ed1) && ed1->bSynchAddress != 0) { + DPRINTF("Sync endpoint will be used, if present\n"); + chan_alt->enable_sync = 1; + } else { + DPRINTF("Sync endpoint will not be used\n"); + chan_alt->enable_sync = 0; + } + usbd_set_parent_iface(sc->sc_udev, curidx, sc->sc_mixer_iface_index); @@ -2074,8 +2083,10 @@ tr_transferred: chn_intr(ch->pcm_ch); /* start SYNC transfer, if any */ - if ((ch->last_sync_time++ & 7) == 0) - usbd_transfer_start(ch->xfer[UAUDIO_NCHANBUFS]); + if (ch->usb_alt[ch->cur_alt].enable_sync != 0) { + if ((ch->last_sync_time++ & 7) == 0) + usbd_transfer_start(ch->xfer[UAUDIO_NCHANBUFS]); + } case USB_ST_SETUP: mfl = usbd_xfer_max_framelen(xfer);
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