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greybus: audio: Split start and stop APBridgeA requests 

Provide finer-grained control of the audio streaming on APB1 by
splitting the transmit/receive start and stop requests into prepare,
start, stop, and shutdown.

CC: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Mark Greer 2016-02-29 15:31:02 -07:00 committed by Greg Kroah-Hartman
parent 9250c0ee26
commit 5bbe14b7ac
4 changed files with 112 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/staging/greybus/audio_apbridgea.c
View File

@ -82,6 +82,19 @@ int gb_audio_apbridgea_get_tx_delay(struct gb_connection *connection,
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_get_tx_delay);
int gb_audio_apbridgea_prepare_tx(struct gb_connection *connection,
__u16 i2s_port)
{
struct audio_apbridgea_prepare_tx_request req;
req.hdr.type = AUDIO_APBRIDGEA_TYPE_PREPARE_TX;
req.hdr.i2s_port = cpu_to_le16(i2s_port);
return gb_hd_output(connection->hd, &req, sizeof(req),
GB_APB_REQUEST_AUDIO_CONTROL, true);
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_prepare_tx);
int gb_audio_apbridgea_start_tx(struct gb_connection *connection,
__u16 i2s_port, __u64 timestamp)
{
@ -108,6 +121,19 @@ int gb_audio_apbridgea_stop_tx(struct gb_connection *connection, __u16 i2s_port)
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_stop_tx);
int gb_audio_apbridgea_shutdown_tx(struct gb_connection *connection,
__u16 i2s_port)
{
struct audio_apbridgea_shutdown_tx_request req;
req.hdr.type = AUDIO_APBRIDGEA_TYPE_SHUTDOWN_TX;
req.hdr.i2s_port = cpu_to_le16(i2s_port);
return gb_hd_output(connection->hd, &req, sizeof(req),
GB_APB_REQUEST_AUDIO_CONTROL, true);
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_shutdown_tx);
int gb_audio_apbridgea_set_rx_data_size(struct gb_connection *connection,
__u16 i2s_port, __u16 size)
{
@ -130,6 +156,19 @@ int gb_audio_apbridgea_get_rx_delay(struct gb_connection *connection,
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_get_rx_delay);
int gb_audio_apbridgea_prepare_rx(struct gb_connection *connection,
__u16 i2s_port)
{
struct audio_apbridgea_prepare_rx_request req;
req.hdr.type = AUDIO_APBRIDGEA_TYPE_PREPARE_RX;
req.hdr.i2s_port = cpu_to_le16(i2s_port);
return gb_hd_output(connection->hd, &req, sizeof(req),
GB_APB_REQUEST_AUDIO_CONTROL, true);
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_prepare_rx);
int gb_audio_apbridgea_start_rx(struct gb_connection *connection,
__u16 i2s_port)
{
@ -155,6 +194,19 @@ int gb_audio_apbridgea_stop_rx(struct gb_connection *connection, __u16 i2s_port)
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_stop_rx);
int gb_audio_apbridgea_shutdown_rx(struct gb_connection *connection,
__u16 i2s_port)
{
struct audio_apbridgea_shutdown_rx_request req;
req.hdr.type = AUDIO_APBRIDGEA_TYPE_SHUTDOWN_RX;
req.hdr.i2s_port = cpu_to_le16(i2s_port);
return gb_hd_output(connection->hd, &req, sizeof(req),
GB_APB_REQUEST_AUDIO_CONTROL, true);
}
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_shutdown_rx);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("greybus:audio-apbridgea");
MODULE_DESCRIPTION("Greybus Special APBridgeA Audio Protocol library");

32
drivers/staging/greybus/audio_apbridgea.h
View File

@ -48,12 +48,16 @@
#define AUDIO_APBRIDGEA_TYPE_UNREGISTER_CPORT 0x03
#define AUDIO_APBRIDGEA_TYPE_SET_TX_DATA_SIZE 0x04
#define AUDIO_APBRIDGEA_TYPE_GET_TX_DELAY 0x05
#define AUDIO_APBRIDGEA_TYPE_START_TX 0x06
#define AUDIO_APBRIDGEA_TYPE_STOP_TX 0x07
#define AUDIO_APBRIDGEA_TYPE_SET_RX_DATA_SIZE 0x08
#define AUDIO_APBRIDGEA_TYPE_GET_RX_DELAY 0x09
#define AUDIO_APBRIDGEA_TYPE_START_RX 0x0a
#define AUDIO_APBRIDGEA_TYPE_STOP_RX 0x0b
#define AUDIO_APBRIDGEA_TYPE_PREPARE_TX 0x06
#define AUDIO_APBRIDGEA_TYPE_START_TX 0x07
#define AUDIO_APBRIDGEA_TYPE_STOP_TX 0x08
#define AUDIO_APBRIDGEA_TYPE_SHUTDOWN_TX 0x09
#define AUDIO_APBRIDGEA_TYPE_SET_RX_DATA_SIZE 0x0a
#define AUDIO_APBRIDGEA_TYPE_GET_RX_DELAY 0x0b
#define AUDIO_APBRIDGEA_TYPE_PREPARE_RX 0x0c
#define AUDIO_APBRIDGEA_TYPE_START_RX 0x0d
#define AUDIO_APBRIDGEA_TYPE_STOP_RX 0x0e
#define AUDIO_APBRIDGEA_TYPE_SHUTDOWN_RX 0x0f
#define AUDIO_APBRIDGEA_PCM_FMT_8 BIT(0)
#define AUDIO_APBRIDGEA_PCM_FMT_16 BIT(1)
@ -120,6 +124,10 @@ struct audio_apbridgea_get_tx_delay_response {
__le16 delay;
} __packed;
struct audio_apbridgea_prepare_tx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
struct audio_apbridgea_start_tx_request {
struct audio_apbridgea_hdr hdr;
__le64 timestamp;
@ -129,6 +137,10 @@ struct audio_apbridgea_stop_tx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
struct audio_apbridgea_shutdown_tx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
struct audio_apbridgea_set_rx_data_size_request {
struct audio_apbridgea_hdr hdr;
__le16 size;
@ -143,6 +155,10 @@ struct audio_apbridgea_get_rx_delay_response {
__le16 delay;
} __packed;
struct audio_apbridgea_prepare_rx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
struct audio_apbridgea_start_rx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
@ -151,4 +167,8 @@ struct audio_apbridgea_stop_rx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
struct audio_apbridgea_shutdown_rx_request {
struct audio_apbridgea_hdr hdr;
} __packed;
#endif /*__AUDIO_APBRIDGEA_H */

32
drivers/staging/greybus/audio_codec.c
View File

@ -345,17 +345,33 @@ static int gbcodec_trigger(struct snd_pcm_substream *substream, int cmd,
goto func_exit;
}
if (start && tx)
ret = gb_audio_apbridgea_start_tx(gb_dai->connection, 0, 0);
if (start && tx) {
ret = gb_audio_apbridgea_prepare_tx(gb_dai->connection, 0);
if (!ret)
ret = gb_audio_apbridgea_start_tx(gb_dai->connection, 0,
0);
}
else if (start && rx)
ret = gb_audio_apbridgea_start_rx(gb_dai->connection, 0);
else if (start && rx) {
ret = gb_audio_apbridgea_prepare_rx(gb_dai->connection, 0);
if (!ret)
ret = gb_audio_apbridgea_start_rx(gb_dai->connection,
0);
}
else if (stop && tx)
else if (stop && tx) {
ret = gb_audio_apbridgea_stop_tx(gb_dai->connection, 0);
if (!ret)
ret = gb_audio_apbridgea_shutdown_tx(gb_dai->connection,
0);
}
else if (stop && rx)
else if (stop && rx) {
ret = gb_audio_apbridgea_stop_rx(gb_dai->connection, 0);
if (!ret)
ret = gb_audio_apbridgea_shutdown_rx(gb_dai->connection,
0);
}
else
ret = -EINVAL;
@ -488,6 +504,10 @@ static void gb_audio_cleanup(struct gbaudio_codec_info *gb)
if (ret)
dev_info(dev, "%d:Failed during APBridge stop_tx\n",
ret);
ret = gb_audio_apbridgea_shutdown_tx(connection, 0);
if (ret)
dev_info(dev, "%d:Failed during APBridge shutdown_tx\n",
ret);
cportid = connection->intf_cport_id;
ret = gb_audio_gb_deactivate_tx(gb->mgmt_connection,
cportid);

8
drivers/staging/greybus/audio_codec.h
View File

@ -207,17 +207,25 @@ extern int gb_audio_apbridgea_set_tx_data_size(struct gb_connection *connection,
__u16 i2s_port, __u16 size);
extern int gb_audio_apbridgea_get_tx_delay(struct gb_connection *connection,
__u16 i2s_port, __u32 *delay);
extern int gb_audio_apbridgea_prepare_tx(struct gb_connection *connection,
__u16 i2s_port);
extern int gb_audio_apbridgea_start_tx(struct gb_connection *connection,
__u16 i2s_port, __u64 timestamp);
extern int gb_audio_apbridgea_stop_tx(struct gb_connection *connection,
__u16 i2s_port);
extern int gb_audio_apbridgea_shutdown_tx(struct gb_connection *connection,
__u16 i2s_port);
extern int gb_audio_apbridgea_set_rx_data_size(struct gb_connection *connection,
__u16 i2s_port, __u16 size);
extern int gb_audio_apbridgea_get_rx_delay(struct gb_connection *connection,
__u16 i2s_port, __u32 *delay);
extern int gb_audio_apbridgea_prepare_rx(struct gb_connection *connection,
__u16 i2s_port);
extern int gb_audio_apbridgea_start_rx(struct gb_connection *connection,
__u16 i2s_port);
extern int gb_audio_apbridgea_stop_rx(struct gb_connection *connection,
__u16 i2s_port);
extern int gb_audio_apbridgea_shutdown_rx(struct gb_connection *connection,
__u16 i2s_port);
#endif /* __LINUX_GBAUDIO_CODEC_H */