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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2014-12-08 16:10:37 +0100
committerTakashi Iwai <tiwai@suse.de>2014-12-10 10:45:28 +0100
commit8fc01fc0674e3ea7fdd13bd3d138793619227f89 (patch)
tree2098bbdcc0248276ca589c35bd2f8bd1aa929a48 /fs
parentALSA: dice: Add support for duplex streams with synchronization (diff)
downloadlinux-8fc01fc0674e3ea7fdd13bd3d138793619227f89.tar.xz
linux-8fc01fc0674e3ea7fdd13bd3d138793619227f89.zip
ALSA: dice: Support for non SYT-Match sampling clock source mode
This commit allows this driver to handle devices with non SYT-Match sampling clock source. When sampling clock source is SYT-Match mode, devices handle 'presentation timestamp' in received packets and generates sampling clock according to the information. In this case, driver is synchronization master and must transfer correct value in SYT field of each packets in outgoing stream, then the outgoing stream is a master stream. On the other hand, non SYT-Match mode, devices do this. So drivers must pick up the value in SYT field of incoming packets and use the value for outgoing stream. Currently firewire-lib module achieve this work. Furthermore, without SYT-Match and internal clock source, the sampling rate should be fixed for the other devices connected to the handled device. This commit add a restriction of sampling rate at this situation. With these implementations, this driver has no need to set clock source. This commit remove set function. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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