BMC/Intel-BMC/linux.git/sound/firewire/dice, branch dev

Revert "ALSA: dice: fix wrong offsets for Dice interface"

2015-03-10T14:26:25+00:00

This reverts commit 8cdebf71098c07168ef6335e2f1f35d85dbe3049. The reverted commit breaks out-stream functionality of Dice driver. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: dice: fix wrong offsets for Dice interface

2015-03-01T09:49:06+00:00

For received packet stream, the offset of 'RX_SEQ_START' locates after the offset of 'RX_NUMBER_MIDI', although current macro and proc output includes wrong offsets. Fortunately, this bug doesn't affect streaming functionality because these macro is not used. This commit fixes these wrong macro and outputs. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireworks/bebob/dice/oxfw: make it possible to shutdown safely

2015-02-23T08:11:24+00:00

A part of these drivers, especially BeBoB driver, are programmed to wait some events. Thus the drivers should not destroy any data in .remove() context. This commit moves some destructors from 'struct fw_driver.remove()' to 'struct snd_card.private_free()' to shutdown safely. Signed-off-by: Takashi Sakamoto Cc: # 3.19+ Signed-off-by: Takashi Iwai

ALSA: fireworks/bebob/dice/oxfw: allow stream destructor after releasing runtime

2015-02-23T08:11:16+00:00

Currently stream destructor in each driver has a problem to be called in a context in which sound card object is released, because the destructors call amdtp_stream_pcm_abort() and touch PCM runtime data. The PCM runtime data is destroyed in application's context with snd_pcm_close(), on the other hand PCM substream data is destroyed after sound card object is released, in most case after all of ALSA character devices are released. When PCM runtime is destroyed and PCM substream is remained, amdtp_stream_pcm_abort() touches PCM runtime data and causes Null-pointer-dereference. This commit changes stream destructors and allows each driver to call it after releasing runtime. Signed-off-by: Takashi Sakamoto Cc: # 3.19+ Signed-off-by: Takashi Iwai

ALSA: fireworks/bebob/dice/oxfw: add reference-counting for FireWire unit

2015-02-23T08:10:38+00:00

Fireworks and Dice drivers try to touch instances of FireWire unit after sound card object is released, while references to the unit is decremented in .remove(). When unplugging during streaming, sound card object is released after .remove(), thus Fireworks and Dice drivers causes GPF or Null-pointer-dereferencing to application processes because an instance of FireWire unit was already released. This commit adds reference-counting for FireWire unit in drivers to allow them to touch an instance of FireWire unit after .remove(). In most case, any operations after .remove() may be failed safely. Signed-off-by: Takashi Sakamoto Cc: # 3.19+ Signed-off-by: Takashi Iwai

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