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Code Issues Releases Wiki Activity

greybus: audio: Register CPorts for specific directions

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Currently, it is assumed that all audio data CPorts registered on
APB1 are used for transmitting audio data.  That may not always be
true like when a microphone is connected but no speakers.  Also,
the current special protocol lacks a way to tell APB1 whether the CPort
being registered is for transmitting, receiving, or both.

Fix by adding a 'direction' field to the register and unregister CPort
requests and define bits indicating which direction (or both) audio
data will go on that CPort.

Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Mark Greer 2016-02-26 17:04:36 -07:00 committed by Greg Kroah-Hartman
parent 611924dd72
commit 4a8e519902
4 changed files with 21 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/staging/greybus/audio_apbridgea.c
View file

@ -29,13 +29,15 @@ int gb_audio_apbridgea_set_config(struct gb_connection *connection,
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_set_config);
int gb_audio_apbridgea_register_cport(struct gb_connection *connection,
__u16 i2s_port, __u16 cportid)
__u16 i2s_port, __u16 cportid,
__u8 direction)
{
struct audio_apbridgea_register_cport_request req;
req.hdr.type = AUDIO_APBRIDGEA_TYPE_REGISTER_CPORT;
req.hdr.i2s_port = cpu_to_le16(i2s_port);
req.cport = cpu_to_le16(cportid);
req.direction = direction;
return gb_hd_output(connection->hd, &req, sizeof(req),
GB_APB_REQUEST_AUDIO_CONTROL, true);
@ -43,13 +45,15 @@ int gb_audio_apbridgea_register_cport(struct gb_connection *connection,
EXPORT_SYMBOL_GPL(gb_audio_apbridgea_register_cport);
int gb_audio_apbridgea_unregister_cport(struct gb_connection *connection,
__u16 i2s_port, __u16 cportid)
__u16 i2s_port, __u16 cportid,
__u8 direction)
{
struct audio_apbridgea_unregister_cport_request req;
req.hdr.type = AUDIO_APBRIDGEA_TYPE_UNREGISTER_CPORT;
req.hdr.i2s_port = cpu_to_le16(i2s_port);
req.cport = cpu_to_le16(cportid);
req.direction = direction;
return gb_hd_output(connection->hd, &req, sizeof(req),
GB_APB_REQUEST_AUDIO_CONTROL, true);

5
drivers/staging/greybus/audio_apbridgea.h
View file

@ -75,6 +75,9 @@
#define AUDIO_APBRIDGEA_PCM_RATE_176400 BIT(11)
#define AUDIO_APBRIDGEA_PCM_RATE_192000 BIT(12)
#define AUDIO_APBRIDGEA_DIRECTION_TX BIT(0)
#define AUDIO_APBRIDGEA_DIRECTION_RX BIT(1)
/* The I2S port is passed in the 'index' parameter of the USB request */
/* The CPort is passed in the 'value' parameter of the USB request */
@ -94,11 +97,13 @@ struct audio_apbridgea_set_config_request {
struct audio_apbridgea_register_cport_request {
struct audio_apbridgea_hdr hdr;
__le16 cport;
__u8 direction;
} __packed;
struct audio_apbridgea_unregister_cport_request {
struct audio_apbridgea_hdr hdr;
__le16 cport;
__u8 direction;
} __packed;
struct audio_apbridgea_set_tx_data_size_request {

9
drivers/staging/greybus/audio_codec.c
View file

@ -60,7 +60,8 @@ static int gbcodec_startup(struct snd_pcm_substream *substream,
i2s_port = 0; /* fixed for now */
cportid = gb_dai->connection->hd_cport_id;
ret = gb_audio_apbridgea_register_cport(gb_dai->connection, i2s_port,
cportid);
cportid,
AUDIO_APBRIDGEA_DIRECTION_TX);
dev_dbg(dai->dev, "Register %s:%d DAI, ret:%d\n", dai->name, cportid,
ret);
@ -117,7 +118,8 @@ static void gbcodec_shutdown(struct snd_pcm_substream *substream,
/* un register cport */
i2s_port = 0; /* fixed for now */
ret = gb_audio_apbridgea_unregister_cport(gb_dai->connection, i2s_port,
gb_dai->connection->hd_cport_id);
gb_dai->connection->hd_cport_id,
AUDIO_APBRIDGEA_DIRECTION_TX);
dev_dbg(dai->dev, "Unregister %s:%d DAI, ret:%d\n", dai->name,
gb_dai->connection->hd_cport_id, ret);
@ -495,7 +497,8 @@ static void gb_audio_cleanup(struct gbaudio_codec_info *gb)
ret);
cportid = connection->hd_cport_id;
ret = gb_audio_apbridgea_unregister_cport(connection, 0,
cportid);
cportid,
AUDIO_APBRIDGEA_DIRECTION_TX);
if (ret)
dev_info(dev, "%d:Failed during unregister cport\n",
ret);

6
drivers/staging/greybus/audio_codec.h
View file

@ -198,9 +198,11 @@ extern int gb_audio_apbridgea_set_config(struct gb_connection *connection,
__u16 i2s_port, __u32 format,
__u32 rate, __u32 mclk_freq);
extern int gb_audio_apbridgea_register_cport(struct gb_connection *connection,
__u16 i2s_port, __u16 cportid);
__u16 i2s_port, __u16 cportid,
__u8 direction);
extern int gb_audio_apbridgea_unregister_cport(struct gb_connection *connection,
__u16 i2s_port, __u16 cportid);
__u16 i2s_port, __u16 cportid,
__u8 direction);
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,