linux.git/sound/firewire/dice, branch v3.19

ALSA: dice: Add support for MIDI capture/playback

2014-12-10T09:46:14+00:00

This commit adds a support for MIDI capture/playback

When MIDI substrams already start streaming and PCM substreams are going to
join at different sampling rate, streams are stopped once. Then sampling rate
is changed and streams are restarted.

Signed-off-by: Takashi Sakamoto 
Acked-by: Clemens Ladisch 
Signed-off-by: Takashi Iwai

ALSA: dice: Add support for capturing PCM samples

2014-12-10T09:45:53+00:00

This commit adds a support for capturing PCM samples.

When opposite PCM substream is already running, available sampling rate is
limited at current one.

Signed-off-by: Takashi Sakamoto 
Acked-by: Clemens Ladisch 
Signed-off-by: Takashi Iwai

ALSA: dice: Support for non SYT-Match sampling clock source mode

2014-12-10T09:45:28+00:00

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 
Acked-by: Clemens Ladisch 
Signed-off-by: Takashi Iwai

ALSA: dice: Add support for duplex streams with synchronization

2014-12-10T09:44:54+00:00

This commit adds support for AMDTP in-stream. As a result, Dice driver
supports full duplex streams with synchronization.

AMDTP can transfer timestamps in its packets. By handling the timestamp,
devices can synchronize to the other devices or drivers on the same bus.

When Dice chipset is 'enabled', it starts streams with correct settings.
This 'enable' register is global, thus, when a stream is started to run,
an opposite stream can't start unless turning off 'enable'. Therefore
a pair of streams must be running. This causes a loss of CPU usage when
single stream is needed for neither playbacking or capturing.

This commit assumes that playback-only models also have a functionality
to transmit stream for delivering timestamps.

Currently, sampling clock source is restricted to SYT-Match mode. This is
improved in followed commit. I note that at SYT-Match mode, Dice can select
from 4 streams for synchronization but this driver uses the 1st stream only
for simplicity.

Signed-off-by: Takashi Sakamoto 
Acked-by: Clemens Ladisch 
Signed-off-by: Takashi Iwai

ALSA: dice: Change the way to start stream

2014-12-10T09:44:37+00:00

Streaming functionality can start streams when rate is given but currently
some codes are in PCM functionality.

This commit changes the way to start stream and add some arrangement
to make it easy to understand the way.

Signed-off-by: Takashi Sakamoto 
Acked-by: Clemens Ladisch 
Signed-off-by: Takashi Iwai

ALSA: dice: fix semicolon.cocci warnings

2014-12-01T20:41:07+00:00

sound/firewire/dice/dice-transaction.c:34:2-3: Unneeded semicolon

 Removes unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Takashi Sakamoto 
Signed-off-by: Fengguang Wu 
Signed-off-by: Takashi Iwai

ALSA: dice: Add new functions for constraints of PCM parameters

2014-11-29T19:17:06+00:00

This commit adds a new functions and some arrangement for PCM restriction.
This arrangement is due to the number of channels which each Dice device has.

I note that minimum number for period becomes 2, instead of 1 because its PCM
functionality has SNDRV_PCM_INFO_BATCH, this means that the driver uses double
(or more) buffering so the minimum number for period should be 2.

Signed-off-by: Takashi Sakamoto 
Signed-off-by: Takashi Iwai

ALSA: dice: Split proc interface into a file

2014-11-29T19:09:47+00:00

This commit adds a file and move some codes related to proc output.

Signed-off-by: Takashi Sakamoto 
Signed-off-by: Takashi Iwai

ALSA: dice: Split hwdep functionality into a file

2014-11-29T19:08:19+00:00

This commit adds a file and move some codes related to hwdep functionality.

This interface is designed for mixer/control application. By using hwdep
interface, the application can get information about firewire node, can
lock/unlock kernel streaming and can get notification at starting/stopping
kernel streaming.

Additionally, this interface give a way to read Dice notification.

Signed-off-by: Takashi Sakamoto 
Signed-off-by: Takashi Iwai

ALSA: dice: Split PCM functionality into a file

2014-11-29T19:07:47+00:00

This commit adds a file and move some codes related to PCM functionality.

Currently PCM playback is supported. PCM capture will be supported in followed
commits.

Signed-off-by: Takashi Sakamoto 
Signed-off-by: Takashi Iwai