kernel/sound/firewire/fireface/ff-protocol-former.c, branch linux-5.14.y

ALSA: fireface: update isochronous resources when starting packet streaming after bus-reset

2019-06-11T09:36:25Z

After bus reset, isochronous resource manager releases all of allocated isochronous resources. The nodes to restart packet streaming should request reallocation of the resources. However, between the bus-reset and invocation of 'struct fw_driver.update' handler, ALSA PCM application can detect this situation by XRUN because the target device cancelled to transmit packets once bus-reset occurs. Due to the above mechanism, ALSA fireface driver just stops packet streaming in the update handler, thus pcm.prepare handler should request the reallocation. This commit requests the reallocation in pcm.prepare callback when bus generation is changed. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: support allocate_resources operation in ff400 protocol

2019-06-11T09:36:23Z

This commit is a part of preparation to perform allocation/release of isochronous channels in pcm.hw_params/hw_free callbacks. This commit implements allocate_resources callback for ff400 protocol. In this callback, sampling transfer frequency is configured to the device as well. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: support allocate_resources operation in ff800 protocol

2019-06-11T09:36:23Z

This commit is a part of preparation to perform allocation/release of isochronous channels in pcm.hw_params/hw_free callbacks. This commit implements allocate_resources callback for ff800 protocol. As I noted in commit fc716397a5c7 ("ALSA: fireface: add support for packet streaming on Fireface 800"), this unit allocates isochronous resources for tx stream voluntarily. Therefore, this commit is to maintain isochronous rsources for rx stream. In the callback, sampling transfer frequency is configured to the device as well. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: comment cleanup about destination address of async transactions for MIDI messages

2019-01-24T13:39:32Z

In Fireface series, registration of higher 4 bytes of destination address for asynchronous transaction of MIDI messages is done by a write transaction to model-specific register. On the other hand, registration of lower 4 bytes of the address is selectable from 4 options. A register for this registration includes the other purpose options such as input attenuation. Thus this driver expects userspace applications to configure the register. Actual behaviour for the asynchronous transaction is different depending on protocols. In former protocol, destination offset of each transaction is the same as the registered address even if it is block request. In latter models, destination offset of each transaction is the offset of previous transaction plus 4 byte and the transaction is quadlet request. This commit cleanups comments about the above mechanism. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: add protocol-specific operation to fill transaction buffer with MIDI messages

2019-01-22T16:20:54Z

Between former and latter models, content of asynchronous transaction for MIDI messages from driver to device is different. This commit is a preparation to support latter models. A protocol-specific operation is added to encode MIDI messages to the transaction. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: change prototype of handler for async transaction with MIDI messages

2019-01-22T16:20:49Z

In a series of Fireface, devices transfer asynchronous transaction with MIDI messages. In the transaction, content is different depending on models. ALSA fireface driver has protocol-dependent handler to pick up MIDI messages from the content. In latter models of the series, the transaction is transferred to range of address sequentially. This seems to check continuity of transferred messages. This commit changes prototype of the handler to receive offset of address for received transactions. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: code refactoring to parse of clock configuration

2019-01-21T14:12:23Z

A procedure to retrieve clock configuration is used by two callers. Each of caller has duplicated code to parse bits. This commit adds refactoring to remove the duplicated code. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: code refactoring for dump of sync status

2019-01-21T14:12:23Z

This commit adds refactoring for dump of sync status by adding tables for check bits. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: add protocol-dependent operation to get clock status

2019-01-21T14:12:20Z

This commit adds a member for a callback function to get clock status to former protocol. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai

ALSA: fireface: add protocol-dependent operation to switch mode to fetch PCM frame

2019-01-21T14:12:19Z

This commit adds a member for a callback function to switch frame fetching mode to former protocol. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai